Consumer medicine information

Azarga Eye Drops

Brinzolamide; Timolol

BRAND INFORMATION

Brand name

Azarga

Active ingredient

Brinzolamide; Timolol

Schedule

S4

 

Consumer medicine information (CMI) leaflet

Please read this leaflet carefully before you start using Azarga Eye Drops.

What Is In This Leaflet

Please read this leaflet carefully before you use any AZARGA Eye drops. This leaflet answers some common questions about AZARGA. It does not contain all of the available information. It does not take the place of talking to your doctor or pharmacist.

The information in this leaflet was last updated on the date listed on the final page. More recent information on the medicine may be available.

You should ensure that you speak to your pharmacist or doctor to obtain the most up to date information on the medicine.

You can also download the most up to date leaflet in Australia from www.novartis.com.au and in New Zealand from www.medsafe.govt.nz. The updates may contain important information about the medicine and its use of which you should be aware.

All medicines have risks and benefits. Your doctor has weighed the expected benefits of you using AZARGA against the risks this medicine could have for you.

If you have any concerns about taking this medicine, ask your doctor or pharmacist.

Keep this leaflet with the medicine. You may need to read it again.

What AZARGA is used for

AZARGA is used to lower pressure in the eye and to treat glaucoma. Glaucoma is a condition in which the pressure of fluid in the eye may be high. However, some people with glaucoma may have normal eye pressure.

Glaucoma is usually caused by a build-up of the fluid which flows through the eye. This build up occurs because the fluid drains out of your eye more slowly than it is being pumped in. Since new fluid continues to enter the eye, joining the fluid already there, the pressure continues to rise. This raised pressure may damage the back of the eye resulting in gradual loss of sight. Damage can progress so slowly that the person is not aware of this gradual loss of sight. Sometimes even normal eye pressure is associated with damage to the back of the eye.

There are usually no symptoms of glaucoma. The only way of knowing that you have glaucoma is to have your eye pressure, optic nerve and visual field checked by an eye specialist. If glaucoma is not treated, it can lead to serious problems, including total blindness. In fact, untreated glaucoma is one of the most common causes of blindness.

AZARGA combines two ingredients, brinzolamide and timolol. Brinzolamide is a carbonic anhydrase inhibitor and timolol is a beta-blocker. Both brinzolamide and timolol work by reducing the production of fluid within the eye. Although AZARGA helps control your glaucoma, it does not cure it.

For more information about glaucoma, contact Glaucoma Australia on 1800 500 880 or Glaucoma New Zealand on 09 373 8779.

Your doctor may have prescribed AZARGA for another reason. Ask your doctor if you have any questions about why AZARGA has been prescribed for you.

There is no evidence that AZARGA is addictive.

Use in Children

There is not enough information to recommend the use of this medicine in children under the age of 18 years.

Before you use AZARGA

When you must not use it

Do not use AZARGA if you have an allergy to:

  • Brinzolamide
  • Timolol or other beta blockers which are used to treat high blood pressure, heart problems, angina, migraine, anxiety and glaucoma
  • Sulphonamides or sulpha-containing medicines
  • Any of the other ingredients in AZARGA listed at the end of this leaflet.

If you think you may be allergic, ask your doctor or healthcare provider for advice.

Some of the symptoms of an allergic reaction may include:

  • shortness of breath
  • wheezing or difficulty breathing
  • swelling of the face, lips, tongue or other parts of the body
  • rash, itching or hives on the skin.

Do not use AZARGA if:

  • the safety seal around the closure and neck area is broken
  • the bottle/packaging is torn or shows signs of tampering
  • the expiry date on the bottle/carton has passed.

If it has expired or is damaged, return it to your pharmacist for disposal. If you use this medicine after the expiry date has passed, it may not work.

Tell your doctor if you have or have had any medical conditions, particularly the following:

  • respiratory problems such as asthma, chronic obstructive lung disease (emphysema), bronchitis or other types of breathing problems
  • bronchial hyper-reactivity seen in chronic asthma and obstructive lung disease
  • heart and circulation conditions, such as a very slow heart rate, an irregular heartbeat, heart failure, chest pain or low blood pressure
  • a condition called hyperchloraemic acidosis (too much acidity in your blood)
  • severe kidney impairment
  • severe allergic rhinitis or hayfever.

If you are not sure whether you should start using AZARGA, talk to your doctor.

Before you start to use it

Tell your doctor if you have had an allergy to any other medicines or any other substances, such as foods, preservatives or dyes.

Tell your doctor if:

You are pregnant or plan to become pregnant. Your doctor will discuss the possible risks and benefits of using AZARGA during pregnancy.

You are breast-feeding or intend to breast-feed. Your doctor will discuss the possible risks and benefits of using AZARGA when you are breast feeding.

You have or have had any medical conditions such as:

  • problems with your kidneys
  • diabetes mellitus as timolol may mask signs and symptoms of low blood sugar
  • Raynaud's disease
  • severe heart disease
  • Prinzmetal angina, blood circulation problems or low blood pressure
  • impaired corneas which can occur in diabetes mellitus
  • problems with your corneas such as low endothelial cell counts or corneal dystrophies
  • narrow angle glaucoma
  • thyrotoxicosis, a condition where there is too much thyroid in the body as timolol may mask signs and symptoms of thyroid disease
  • muscle weakness consistent with certain myasthenic symptoms.

If you are unsure if you have any of these conditions ask your doctor.

If you have not told your doctor about any of the above, tell them before you use AZARGA.

Do not put AZARGA Eye Drops into your eye(s) while you are wearing contact lenses. Do not put the eye drops into your eye(s) while you are wearing soft contact lenses. The preservative in AZARGA (benzalkonium chloride) may be deposited in soft contact lenses.

You can put your soft contact lenses back into your eyes 15 minutes after you have used AZARGA.

Using other medicines

Tell your doctor if you are taking or using any other medicines, including other eye drops or ointments, and any other medicines that you buy without a prescription from your pharmacy, supermarket or health food shop.

Some medicines and AZARGA may interfere with each other or add to the effects of AZARGA. These include:

  • medicines for high blood pressure or heart conditions, including a group of medicines called beta-blockers and calcium channel blockers
  • digoxin, a medicine used to treat heart failure
  • medicines such as quinidine or amiodarone used to treat slow or irregular heart beat
  • clonidine, a medicine used to treat high blood pressure and migraines
  • other medicines or eye drops for glaucoma
  • medicines used to treat diabetes
  • carbonic anhydrase inhibitors such as acetazolamide or medicines that are nonsteroidal anti-inflammatory drugs (NSAIDs) or salicylates
  • medicines such as cimetidine used to treat stomach or bowel ulcers
  • medicines such as ketoconazole, itraconazole, clotrimazole and ritonavir
  • parasympathomimetics.

These medicines may be affected by AZARGA, or may affect how well it works. You may need different amounts of your medicines, or you may need to take different medicines.

If you are unsure if you are taking or using any of these medicines ask your doctor or pharmacist.

Your doctor or pharmacist has more information on medicines to be careful with or avoid while using AZARGA.

How to use AZARGA

Carefully follow all directions given to you by your doctor and pharmacist. They may differ from the information contained in this leaflet.

If you are being changed from one medicine to another, follow your doctor’s instructions carefully as to when to stop the medicine and when to start the new eye drops.

If you do not understand the instructions on the carton, ask your doctor or pharmacist for help.

How much to use

Use AZARGA only when prescribed by your doctor.

The usual dose of AZARGA is ONE DROP in the affected eye(s) TWICE DAILY. Usually, this means ONE DROP in the affected eye(s) first thing in the morning, and ONE DROP in the evening.

Your doctor will tell you how many drops you need to use each day.

These dosing instructions will be printed on the label your pharmacist adds.

How to use it

It is important to use AZARGA exactly as your doctor or pharmacist has told you. If you use the drops less often than prescribed, they may not work as well and the eye problem may not improve. Using the drops more often than prescribed may not improve the eye problem any faster and may cause increased side effects.

If you are wearing soft contact lenses, remove them before putting the drops in your eye.

Follow these steps to use the eye drops:

  1. Wash your hands thoroughly with soap and water.
  2. Immediately before using a bottle for the first time, break the safety seal around the neck area and throw the loose plastic ring away.
  3. Shake the bottle.
  4. Remove the cap from the bottle.
  5. Hold the bottle upside down in one hand between your thumb and middle finger (see Diagram 1).

  1. While tilting your head back, gently pull down the lower eyelid of your eye to form a pouch/pocket.
  2. Place the tip of the bottle close to your eye. Do not let it touch your eye. Do not squeeze the bottle.
  3. Release ONE DROP into the pouch/pocket formed between your eye and eyelid by gently tapping or pressing the base of the bottle with your forefinger (see Diagrams 2 and 3).

  1. Close your eye. Do not blink or rub your eye.
  2. While your eye is closed, place your index finger against the inside corner of your eye and press against your nose for about two minutes. This will help to stop the medicine from draining through the tear duct to the nose and throat, from where it can be absorbed into other parts of your body. This will also reduce the unpleasant taste sensation that some people experience when using these drops.
  3. If necessary, repeat the above steps for the other eye.
  4. Your eyelids can only hold less than one drop at a time, so it is normal for a small amount of the eye drop to spill onto your cheek. You should wipe away any spillage with a tissue.
  5. Replace the cap on the bottle, closing it tightly.
  6. Wash your hands again with soap and water to remove any residue.

You may feel a slight burning sensation in the eye shortly after using the eye drops. If this persists, or is very uncomfortable, contact your doctor or pharmacist.

Be careful not to touch the dropper tip against your eye, eyelid or anything else. This will help prevent the drops becoming dirty or contaminated.

If you have trouble knowing whether you have placed your drops correctly, you may want to store them in the fridge. Some people find it easier to feel the drops in the eye if they are cold.

After using AZARGA, wait at least 5 minutes before putting any other eye drops in your eye(s).

Wait 15 minutes before replacing your contact lenses.

When to use it

Use AZARGA every day, at about the same times each day, unless your doctor tells you otherwise. Using your eye drops at the same times each day will have the best effect on your eye pressure. It will also help you remember when to use the eye drops.

How long to use it

AZARGA helps control your condition but does not cure it. AZARGA must be used every day. Continue using AZARGA for as long as your doctor prescribes.

If you are unsure about when or how to stop using AZARGA, you should talk to your doctor or pharmacist.

If you forget to use it

If it is almost time for your next dose, skip the dose you missed and use your next dose when you are meant to.

Otherwise, use the drops as soon as you remember, and then go back to using them as you would normally.

Do not use double the amount to make up for the dose that you missed. Using multiple doses may cause unwanted side effects.

If you are not sure whether to skip the dose, talk to your doctor or pharmacist.

If you have trouble remembering to use your eye drops, ask your pharmacist for some hints.

If you use too much (overdose)

If you accidentally put several drops in your eye(s), immediately rinse your eye(s) with warm water.

If you think that you or anyone else may have swallowed any or all of the contents of a bottle of AZARGA, immediately telephone your doctor or the Poisons Information Centre on 13 1126 in Australia or the National Poisons Centre on 0800 POISON or 0800 764 766 in New Zealand for advice, or go to Accident and Emergency at your nearest hospital. Do this even if there are no signs of discomfort or poisoning.

While you are using AZARGA

Things you must do

Keep all your doctor’s appointments so that your progress can be checked.

If you notice signs of serious reactions or hypersensitivity including severe skin reaction such as skin rash, red skin, blistering of the lips, eyes or mouth, skin peeling and fever (signs of Stevens-Johnson syndrome or toxic epidermal necrolysis) discontinue the use of this product and seek medical attention immediately.

Your eye specialist will check your eye pressure to make sure AZARGA is working.

If you are about to start taking any new medicine, tell your doctor and pharmacist that you are using AZARGA.

Tell all the doctors, dentists and pharmacists who are treating you that you are using AZARGA.

Tell your doctor if, for any reason, you have not used AZARGA exactly as prescribed. Otherwise your doctor may think that the eye drops were not effective and change the treatment unnecessarily.

If you become pregnant or decide to breastfeed while using AZARGA, tell your doctor immediately.

Things you must not do

Do not use AZARGA to treat other complaints unless your doctor tells you to.

Do not give AZARGA to anyone else, even if they have the same condition as you.

Do not stop using AZARGA without first talking to your doctor. If you stop using your eye drops, your eye pressures may rise again and damage to your eye may occur.

Things to be careful of

Be careful driving, operating machinery or performing tasks requiring mental alertness and/or physical coordination until you know how AZARGA affects you and your vision. As with any eye medicine, temporary blurred vision or other visual disturbances may affect the ability to drive or use machinery in some people. If blurred vision occurs when you use your drops, wait until your vision is clear before driving or operating machinery.

Side effects

Tell your doctor or pharmacist as soon as possible if you do not feel well while you are using AZARGA.

AZARGA helps most people with high eye pressure and glaucoma, but it may have unwanted side effects in a few people.

All medicines can have side effects. Sometimes they are serious, most of the time they are not. You may need medical treatment if you get some of the side effects.

Do not be alarmed by the following list of possible side effects. You may not experience any of them.

Ask your doctor or pharmacist to answer any questions you may have.

Tell your doctor if you notice any of the following effects in the eye(s) and the eye area, and they worry you:

  • blurred vision
  • eye pain
  • eye irritation
  • feeling of having something in the eye.

These are the more common side effects of your medicine. They are usually mild and short-lived.

Additional side effects that are noticed more rarely include:

  • corneal erosion (pain, feeling of having something in the eye, sensitivity to bright light, excessive tears)
  • eye surface inflammation with surface damage
  • dry eye
  • eye discharge
  • itchy eye
  • redness of the eye and/or eyelids
  • allergic conjunctivitis (eye allergy)
  • corneal disorder
  • inflammation inside the eye
  • eyelid margin crusting
  • tired eyes
  • inflammation of the eyelids
  • problems seeing clearly.

Occasionally some people notice unwanted effects in the rest of their body as a result of using AZARGA. These effects may include:

  • bad taste in the mouth
  • dry mouth
  • lung disease
  • throat irritation and soreness
  • cough
  • asthma
  • increased or decreased blood pressure
  • decreased heart rate
  • changes to heart rhythm
  • chest pain
  • fatigue
  • dizziness
  • headache
  • difficulty sleeping
  • abdominal pain or discomfort
  • diarrhoea
  • nausea
  • skin inflammation, redness or itching
  • tingling or prickling sensation of the skin
  • decreased white blood cells
  • runny nose
  • nose bleed
  • ringing or buzzing in the ears
  • hair disorder
  • muscular pain
  • depression
  • feeling or hearing things that are not there (hallucination)
  • blood in the urine.

Some of the above possible side effects (for example change in blood pressure) can only be found when your doctor does tests to check your progress.

If any of the following happen, stop using AZARGA and tell your doctor immediately or go to Accident and Emergency at your nearest hospital:

  • skin rash, red skin, skin peeling, blistering of the lips, eyes or mouth, fever or any combination of these (Stevens-Johnson syndrome / toxic epidermal necrolysis
  • swelling of the face, hands or feet
  • wheezing, difficulty in breathing
  • shortness of breath
  • severe and sudden onset of pinkish, itchy swellings on the skin, also called hives or nettle rash

These hypersensitivity reactions can be very serious side effects. You may need urgent medical attention or hospitalisation. These side effects are very rare.

Other side effects not listed above may also occur in some people.

After using AZARGA

Storage

Store AZARGA in a cool dry place where the temperature stays below 25°C. It is not necessary to store AZARGA in the refrigerator, but it is acceptable if you prefer to instil cold drops. Do not freeze.

Do not store AZARGA or any other medicine in the car, in the bathroom or in other warm, damp places. Heat and dampness can destroy some medicines.

Keep it where children cannot reach it. A locked cupboard at least one-and-a-half metres above the ground is a good place to store medicines.

Do not leave the top off the bottle for any length of time, to avoid contaminating the eye drops.

Disposal

Write the date on the bottle when you open the eye drops and throw out any remaining solution after four weeks. Eye drops contain a preservative which helps prevent germs growing in the solution for the first four weeks after opening the bottle. After this time there is a greater risk that the drops may become contaminated and cause an eye infection. A new bottle should then be used.

If your doctor tells you to stop using AZARGA or they have passed their expiry date, ask your pharmacist what to do with any remaining solution.

Product description

What it looks like

AZARGA is a liquid (white to off-white uniform suspension) supplied in a pack containing 5 mL in an 8 mL dropper bottle with screw cap.

Tamper evidence is provided with a safety seal around the neck area of the bottle.

Ingredients

Active ingredient(s):

  • brinzolamide 10 mg in 1 mL
  • timolol maleate 5 mg in 1 mL

Inactive ingredients:

  • mannitol
  • carbomer 974P
  • sodium chloride
  • tyloxapol
  • disodium edetate
  • sodium hydroxide and/or hydrochloric acid are added to adjust pH
  • purified water
  • benzalkonium chloride as a preservative.

Allergens:

May contain traces of benzoates, sulfites and hydroxybenzoates.

Supplier

This product is supplied in Australia by:

Novartis Pharmaceuticals Australia Pty Limited
ABN 18 004 244 160
54 Waterloo Road
Macquarie Park NSW 2113
Telephone: 1-800-671-203
Web site: www.novartis.com.au

This product is supplied in New Zealand by:

Novartis New Zealand Limited
PO Box 99102
Newmarket
Auckland 1149
New Zealand
Free Phone: 0800 354 335.

Australian registration number

AUST R 156500.

Date of preparation

This leaflet was prepared in November 2023.

® Registered trademark

© Novartis Pharmaceuticals Australia Pty Limited 2023.

Internal document code

(aza271123c) based on PI (aza271123i)

Published by MIMS January 2024

BRAND INFORMATION

Brand name

Azarga

Active ingredient

Brinzolamide; Timolol

Schedule

S4

 

1 Name of Medicine

Brinzolamide and timolol maleate.

2 Qualitative and Quantitative Composition

The eye drops suspension contains 10 mg/1 mL (1%) brinzolamide and 5 mg/1 mL (0.5%) timolol (as timolol maleate) and also 0.1 mg/1 mL benzalkonium chloride as a preservative. The pH of the eye drops suspension is approximately 7.2.

Excipient with known effect.

Benzoates, sulfites and hydroxybenzoates.
For the full list of excipients, see Section 6.1 List of Excipients.

3 Pharmaceutical Form

Eye drops.
Azarga is a white to off-white uniform suspension.

4 Clinical Particulars

4.1 Therapeutic Indications

Decrease of intraocular pressure (IOP) in patients with open-angle glaucoma or ocular hypertension for whom monotherapy with either component provides insufficient IOP reduction.

4.2 Dose and Method of Administration

The recommended dosage is one drop of Azarga in the conjunctival sac of the affected eye(s) twice daily. Patient should be instructed to shake the bottle well before use.
Nasolacrimal occlusion and closing the eyelid for two minutes, after instillation are recommended. This may reduce the systemic absorption of eye drops, decrease in systemic adverse reactions and an increase in local activity.
If more than one topical ophthalmic medicine is being used, the medicines must be administered at least 5 minutes apart.
If a dose is missed, treatment should be continued with the next dose as planned. The dose should not exceed one drop in the affected eye(s) twice daily.
When substituting another ophthalmic antiglaucoma agent with Azarga, the other agent should be discontinued and Azarga should be started the following day.
To avoid contamination, the dropper tip should not touch any surface. The dropper tip should also not come into contact with the eye as this may cause injury to the eye. Patient should be instructed to keep the bottle tightly closed when not in use.
Patients must be instructed to remove soft contact lenses prior to application of Azarga and to wait fifteen minutes after instillation of the dose before reinsertion.
After cap is removed, if tamper evident snap collar is loose, this should be removed before using the product.

4.3 Contraindications

A history of hypersensitivity to brinzolamide and other sulphonamides, timolol, or any other component of the medication.
The following conditions may also contraindicate the use of Azarga:
reactive airway disease including bronchial asthma, a history of bronchial asthma, or severe chronic obstructive pulmonary disease;
hypersensitivity to other beta-blockers;
sinus bradycardia, second or third degree atrioventricular block, overt cardiac failure, cardiogenic shock, sino-atrial block, sick sinus syndrome;
severe allergic rhinitis and bronchial hyperreactivity;
hyperchloraemic acidosis;
severe renal impairment (see Section 4.4 Special Warnings and Precautions for Use, Use in hepatic impairment, Use in renal impairment).
Azarga is not recommended for use in children below 18 years due to a lack of data on safety and efficacy.

4.4 Special Warnings and Precautions for Use

For topical use only - not for injection or oral ingestion.
Azarga should be discontinued at the first appearance of a skin rash or any other sign of hypersensitivity.

Systemic effects.

Like other topically applied ophthalmic agents, brinzolamide and timolol are absorbed systemically. Systemic absorption can be minimised by nasolacrimal occlusion or closing the eyelids for two minutes (see Section 4.2 Dose and Method of Administration). This may result in a decrease in systemic side effects and an increase in local activity.
Brinzolamide. Azarga contains brinzolamide, a sulphonamide. The same types of undesirable effects that are attributable to sulphonamides may occur with topical administration. Hypersensitivity reactions reported with sulphonamide derivatives, including Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN), can occur in patients receiving Azarga as it is absorbed systemically. At the time of prescription, patients should be advised of the signs and symptoms and monitored closely for skin reactions. If signs of serious reactions or hypersensitivity occur, discontinue use of this medicine immediately.
Acid-base disturbances have been reported with oral carbonic anhydrase inhibitors. Azarga should be used with caution in patients with risk of renal impairment because of the possible risk of metabolic acidosis.
There is potential for an additive effect on the known systemic effects of carbonic anhydrase inhibition in patients receiving an oral carbonic anhydrase inhibitor and Azarga. The concomitant administration of Azarga and oral carbonic anhydrase inhibitors has not been studied and is not recommended.
Timolol.

Cardiovascular safety.

Due to the beta-adrenergic component, timolol, the same types of cardiovascular and pulmonary adverse reactions as seen with systemic beta-adrenergic blocking agents may occur. Cardiac failure should be adequately controlled before beginning therapy with timolol. Patients with a history of severe cardiac disease should be watched for signs of cardiac failure and have their pulse rates checked.
In patients with cardiovascular diseases (e.g. coronary heart disease, Prinzmetal's angina and cardiac failure) and hypotension, therapy with beta-blockers should be critically assessed and the therapy with other active substances should be considered. Patients with cardiovascular diseases should be watched for signs of deterioration of these diseases and of adverse reactions.

Vascular disorders.

Patients with severe peripheral circulatory disturbance/ disorders (i.e. severe forms of Raynaud's disease or Raynaud's syndrome) should be treated with caution.

Respiratory reactions.

Respiratory reactions and cardiac reactions, including death due to bronchospasm in patients with asthma and, rarely, death in association with cardiac failure, have been reported following administration of timolol maleate.

Diabetes mellitus.

Beta-adrenergic blocking agents should be administered with caution in patients subject to spontaneous hypoglycaemia or to patients with labile insulin-dependent diabetes, as beta-adrenergic blocking agents may mask the signs and symptoms of acute hypoglycaemia.

Thyrotoxicosis.

Beta-adrenergic blocking agents may mask the signs of hyperthyroidism.

Muscle weakness.

Beta-adrenergic blocking agents have been reported to potentiate muscle weakness consistent with certain myasthenic symptoms (e.g. diplopia, ptosis and generalized weakness).
Beta-adrenergic blocking agents may also cause worsening of Prinzmetal angina, severe peripheral and central circulatory disorders and hypotension.

Anaphylactic reactions.

While taking beta-adrenergic blocking agents, patients with a history of atopy or a history of severe anaphylactic reaction to a variety of allergens may be more reactive to repeated challenge with such allergens and unresponsive to the usual doses of adrenaline (epinephrine) used to treat anaphylactic reactions.

Choroidal detachment.

Choroidal detachment has been reported with administration of aqueous suppressant therapy (e.g. timolol, acetazolamide) after filtration procedures.

Surgical anaesthesia.

Beta-blocking ophthalmological preparations may block systemic beta-agonist effects, e.g. of adrenaline (epinephrine). The anaesthesiologist should be informed when the patient is receiving timolol.

Ocular effects.

Azarga has not been studied in patients with narrow-angle glaucoma and its use is not recommended in these patients.
There is limited experience with Azarga in the treatment of patients with pseudoexfoliative glaucoma or pigmentary glaucoma. Caution should be utilized in treating these patients and close monitoring of IOP is recommended.
The possible role of brinzolamide on corneal endothelial function has not been investigated in patients with compromised corneas (particularly in patients with low endothelial cell count). Specifically, patients wearing contact lenses have not been studied and careful monitoring of these patients when using brinzolamide is recommended, since carbonic anhydrase inhibitors may affect corneal hydration and wearing contact lenses might increase the risk for the cornea. The use of carbonic anhydrase inhibitors can also lead to corneal decompensation and oedema. Careful monitoring of patients with compromised corneas, such as patients with diabetes mellitus or corneal dystrophies, is recommended.

Use with contact lenses.

Azarga contains benzalkonium chloride which may cause eye irritation and is known to discolour soft contact lenses. Contact with soft contact lenses is to be avoided. Patients must be instructed to remove contact lenses prior to the application of Azarga and wait 15 minutes after instillation of the dose before reinsertion.

Use in hepatic impairment.

No studies have been conducted with Azarga in patients with hepatic impairment. No dosage adjustment is necessary in patients with hepatic impairment.

Use in renal impairment.

No studies have been conducted with Azarga in patients with renal impairment. No dosage adjustment is necessary in patients with mild to moderate renal impairment.
Azarga has not been studied in patients with severe renal impairment (creatinine clearance < 30 mL/min) or in patients with hyperchloraemic acidosis. Since brinzolamide and its main metabolite are excreted predominantly by the kidney, Azarga is therefore contraindicated in patients with severe renal impairment.

Use in the elderly.

There are no modifications to the recommended dosing regimen for elderly patients.

Paediatric use.

Azarga is not recommended for use in children below 18 years due to a lack of data on safety and efficacy.

Effects on laboratory tests.

No data available.

4.5 Interactions with Other Medicines and Other Forms of Interactions

No drug interaction studies have been performed with Azarga.

Brinzolamide.

Azarga contains brinzolamide, a carbonic anhydrase inhibitor and, although administered topically, it's absorbed systemically. Acid-base disturbances have been reported with oral carbonic anhydrase inhibitors. The potential for interactions (e.g. nonsteroidal anti-inflammatory drugs (NSAIDs) and salicylates) must be considered in patients receiving Azarga.
There is a potential for an additive effect on the known systemic effects of carbonic anhydrase inhibition in patients treated with an oral carbonic anhydrase inhibitor and brinzolamide eye drops. The concomitant administration of eye drops containing brinzolamide and oral carbonic anhydrase inhibitors is not recommended.
The cytochrome P450 isozymes responsible for metabolism of brinzolamide include CYP3A4 (main), CYP2A6, CYP2B6, CYP2C8 and CYP2C9. It is expected that inhibitors of CYP3A4 such as ketoconazole, itraconazole, clotrimazole and ritonavir will inhibit the metabolism of brinzolamide by CYP3A4. Caution is advised if CYP3A4 inhibitors are given concomitantly. However, accumulation of brinzolamide is unlikely as renal elimination is the major route. Brinzolamide is not an inhibitor of cytochrome P450 isozymes.

Timolol.

There is a potential for additive effects resulting in hypotension and/or marked bradycardia when eye drops with timolol are administered concomitantly with oral calcium channel blockers or beta-adrenergic blocking agents, antiarrhythmics (including amiodarone), digitalis glycosides or parasympathomimetics. The use of two local beta-adrenergic blocking agents or two local carbonic anhydrase inhibitors is not recommended.
The hypertensive reaction to sudden withdrawal of clonidine can be potentiated when taking beta-adrenergic blocking agents.
Potential systemic beta-blockade (e.g. decreased heart rate) has been reported during combined treatment with CYP2D6 inhibitors (e.g. quinidine, cimetidine) and timolol.
Beta-adrenergic blocking agents may increase the hypoglycaemic effect of antidiabetic agents. Beta-adrenergic blocking agents can mask the signs and symptoms of hypoglycaemia.
Beta blockers can decrease the response to adrenaline (epinephrine) used to treat anaphylactic reactions. Special caution should be exercised in patients with a history of atopy or anaphylaxis (see Section 4.4 Special Warnings and Precautions for Use, Anaphylactic reactions).
Mydriasis resulting from concomitant use of ophthalmic beta-blockers and adrenaline (epinephrine) has been reported occasionally.

4.6 Fertility, Pregnancy and Lactation

Effects on fertility.

There are no human data on the effects of Azarga on male or female fertility. Studies in rats, in which animals were treated orally with brinzolamide up to 18 mg/kg/day or with timolol up to 100 mg/kg/day, showed no adverse effects on male or female fertility.
(Category C)
No studies have been conducted with Azarga in pregnant women, and no animal studies have been conducted with the combined components to evaluate effects on reproduction. Studies in animals with brinzolamide have shown reproductive toxicity following systemic administration. Azarga should only be used during pregnancy if the potential benefit justifies the potential risk to the foetus. However, if Azarga is administered until delivery, the neonate should be carefully monitored during the first days of life.

Brinzolamide.

Developmental toxicity studies with brinzolamide in rabbits at oral doses up to 6 mg/kg/day produced maternal toxicity at 6 mg/kg/day and a significant increase in the number of foetal variations, e.g. accessory skull bones; at 1 and 6 mg/kg/day, the incidence was only slightly higher than seen historically. In rats, statistically significant decreased bodyweights of foetuses from dams receiving oral doses of 18 mg/kg/day during gestation were proportional to the reduced maternal weight gain, with no statistically significant effects on organ or tissue development. No treatment related malformations were seen. Exposure levels are much lower following topical administration of brinzolamide. There are no adequate data from the use of brinzolamide in pregnant women. The potential risk for humans is unknown.

Timolol.

Timolol maleate was not teratogenic in mice, rats and rabbits. Embryo-foetal development studies with timolol maleate in mice and rabbits showed no evidence of embryo-foetal toxicity at oral doses up to 50 mg/kg/day. At higher doses, increases in resorptions and foetal variations (14 ribs and hypoplastic sternebrae) in mice (1000 mg/kg/day) and increased resorption in rabbits (≥ 90 mg/kg/day) were observed. In rats, delayed ossification was seen at oral doses ≥ 50 mg/kg/day, and decreased number of caudal vertebral bodies and arches, and an increase in hypoplastic sternebrae were noted at 500 mg/kg/day. In humans, well-controlled epidemiological studies with systemic use of beta-adrenergic blocking agents did not indicate malformative effects, but show a risk of intrauterine growth retardation. In addition, signs and symptoms of beta-blockade (e.g. bradycardia, hypotension, respiratory distress and hypoglycaemia) have been observed in foetuses or neonates when beta-blockers have been administered until delivery. Data on a limited number of exposed pregnancies indicate no adverse effects of timolol in eye drops on pregnancy or on the health of the foetus/ newborn child but bradycardia and arrhythmia have been reported in one case in the foetus of a woman treated with timolol eye drops. To date, no other relevant epidemiological data are available.
It is not known whether brinzolamide is transferred into human milk following topical ocular administration. Timolol is detectable in human milk following topical ocular administration.
Studies in animals have shown that following oral administration brinzolamide is excreted in breast milk. Following oral administration of 14C-brinzolamide to lactating rats, radioactivity was found in milk at concentrations below those in the blood and plasma. Decreases in pup bodyweights were observed at 15 mg/kg/day in a prenatal and postnatal study in which rats were given brinzolamide by oral gavage at doses up to 15 mg/kg/day.
Because of the potential for serious adverse reactions in breastfed infants from brinzolamide and timolol, a decision should be made whether to discontinue breastfeeding or to discontinue Azarga, taking into account the importance of the drug to the mother.

4.7 Effects on Ability to Drive and Use Machines

The effects of this medicine on a person's ability to drive and use machines were not assessed as part of its registration.
However, as with any eye drops, temporary blurred vision or other visual disturbances may affect the ability to drive or use machines. If blurred vision occurs at instillation, the patient must wait until the vision clears before driving or using machinery. Carbonic anhydrase inhibitors may impair the ability to perform tasks requiring mental alertness and/or physical coordination.

4.8 Adverse Effects (Undesirable Effects)

In two clinical trials of 6 and 12 months duration involving 394 patients treated with Azarga, the most frequently reported adverse reaction was transient blurred vision upon instillation (3.6%), lasting from a few seconds to a few minutes.
The following adverse reactions were assessed to be treatment-related. Within each frequency grouping, undesirable effects are presented in order of decreasing seriousness.

Psychiatric disorders.

Uncommon (≥ 0.1% to < 1%): insomnia.

Nervous system disorders.

Common (≥ 1% to < 10%): dysgeusia.
Dysgeusia (bitter or unusual taste in the mouth following instillation) was a frequently reported systemic undesirable effect associated with the use of Azarga during clinical studies. It is probably caused by passage of the eye drops in the nasopharynx via the nasolacrimal canal. Nasolacrimal occlusion and gently closing the eyelid after instillation may help reduce the incidence of this effect.

Eye disorders.

Common (≥ 1% to < 10%): blurred vision, eye pain, eye irritation, foreign body sensation in eyes.
Uncommon (≥ 0.1% to < 1%): corneal erosion, punctate keratitis, dry eye, eye discharge, eye pruritus, ocular hyperaemia, blepharitis, allergic conjunctivitis, corneal disorder, anterior chamber flare, conjunctival hyperaemia, eyelid margin crusting, asthenopia, abnormal sensation in eye, eyelids pruritus, allergic blepharitis, erythema of eyelid, photophobia, lacrimation increased, sclera hyperaemia.

Vascular disorders.

Uncommon (≥ 0.1% to < 1%): decreased blood pressure.

Respiratory, thoracic and mediastinal disorders.

Uncommon (≥ 0.1% to < 1%): chronic obstructive pulmonary disease, pharyngolaryngeal pain, rhinorrhoea, cough.

Skin and subcutaneous tissue disorders.

Uncommon (≥ 0.1% to < 1%): hair disorder, lichen planus.

Postmarketing experience.

The following adverse reactions are classified according to the following convention: very common (≥ 1/10), common (≥ 1/100 to < 1/10), uncommon (≥ 1/1,000 to < 1/100), rare (≥ 1/10,000 to < 1/1,000), very rare (< 1/10,000). Within each frequency grouping, adverse reactions are presented in order of decreasing seriousness. These adverse reactions were obtained from clinical trials. See Table 1.
Additional adverse reactions identified from post-marketing surveillance include the following.
Frequencies cannot be estimated from the available data. See Table 2.

Reporting suspected adverse effects.

Reporting suspected adverse reactions after registration of the medicinal product is important. It allows continued monitoring of the benefit-risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions at www.tga.gov.au/reporting-problems.

4.9 Overdose

No case of overdose has been reported. A topical overdose of Azarga may be flushed from the eye(s) with warm tap water. If an overdose with Azarga occurs, treatment should be symptomatic and supportive. In case of accidental ingestion, symptoms of overdose from beta blockade may include bradycardia, hypotension, cardiac failure and bronchospasm.
Due to brinzolamide, electrolyte imbalance, development of an acidotic state, and possibly central nervous system effects may occur. Serum electrolyte levels (particularly potassium) and blood pH levels should be monitored. Studies have shown that timolol does not dialyse readily.
For information on the management of overdose, contact the Poisons Information Centre on 13 11 26 (Australia).

5 Pharmacological Properties

5.1 Pharmacodynamic Properties

Mechanism of action.

Azarga contains two active substances: brinzolamide and timolol maleate. These two components decrease elevated intraocular pressure (IOP) primarily by reducing aqueous humour secretion, but do so by different mechanisms of action. Clinical data demonstrates that the combined effect of these two active substances results in additional IOP reduction compared to either compound alone.
Brinzolamide exhibits a high affinity for and is a potent inhibitor of human carbonic anhydrase II (CA-II). Carbonic anhydrase exists as a number of isoenzymes and is found in many tissues in the body; CA-II is the predominant iso-enzyme in the eye. Inhibition of CA-II in the ciliary processes of the eye decreases aqueous humour secretion, presumably by slowing the formation of bicarbonate ions with subsequent reduction in sodium and fluid transport. Brinzolamide exhibited minimal cardiovascular effects, including no inducement of QTc prolongation and no or minimal effect on blood pressure and heart rate, and had no significant local anaesthetic (membrane stabilising) activity on the cornea.
Timolol is a non-selective beta-adrenergic receptor blocking agent that has no significant intrinsic sympathomimetic, direct myocardial depressant or local anaesthetic (membrane stabilising) activity. The precise mechanism of action of timolol in lowering IOP is not clearly established at this time, although tonography and fluorophotometry studies suggest that its predominant action is related to reduced aqueous humour formation; a slight increase in outflow facility was also observed in some studies.

Clinical trials.

In a twelve-month, double-masked, randomised clinical trial in patients (n = 437) with open angle glaucoma or ocular hypertension who, in the investigator's opinion, could benefit from combination therapy and who had baseline mean IOP of 25 to 27 mmHg, the mean IOP-lowering effect of Azarga was 7 to 9 mmHg and for dorzolamide 20 mg/mL + timolol 5 mg/mL it was 7 to 9 mmHg, when dosed twice daily. The non-inferiority of Azarga as compared to dorzolamide 20 mg/mL + timolol 5 mg/mL in the mean IOP reduction was demonstrated across all on-therapy time-points at all visits. When evaluated at each visit, up to 60% of patients in the Azarga group and up to 59% of patients in the dorzolamide 20 mg/mL group had IOP of less than 18 mmHg.
In a six-month, double-masked, randomised clinical study in patients (n = 523) with open-angle glaucoma or ocular hypertension and baseline mean IOP of 25 to 27 mmHg, the mean IOP-lowering effect of Azarga dosed twice daily was 8 to 9 mmHg, and was up to 3 mmHg greater than that of brinzolamide 10 mg/mL dosed twice daily and up to 2 mmHg greater than that of timolol 5 mg/mL dosed twice daily. A statistically superior reduction (p < 0.05) in mean IOP was observed compared to both brinzolamide and timolol at all on-therapy time-points and visits throughout the study. IOP measurements conducted at 8 am, 10 am, 12 pm, 4 pm and 8 pm confirm that diurnal IOP control is superior (p < 0.05) and clinically relevant for Azarga compared to either brinzolamide 10 mg/mL or timolol 5 mg/mL. The primary efficacy endpoint of mean IOP at 8 am and 10 am post dose for this study can be seen in Table 3.
In a 7-day, double masked, randomised clinical trial (n = 96), the ocular comfort, based on burning and stinging, of Azarga was superior (p = 0.0003) to that of dorzolamide 20 mg/mL + timolol 5 mg/mL. A comparison of the frequency distribution of the severity of ocular discomfort demonstrated a significant difference (p = 0.0001) between the two treatment groups, with Azarga having a lesser percentage of patients experiencing mild, moderate and severe ocular discomfort compared to dorzolamide 20 mg/mL + timolol 5 mg/mL. A significantly higher percentage of patients randomized to Azarga experienced no ocular discomfort after 1 week of dosing (p = 0.0004) compared to patients who received dorzolamide 20 mg/mL + timolol 5 mg/mL.

5.2 Pharmacokinetic Properties

Absorption.

Following topical ocular administration, brinzolamide and timolol are absorbed through the cornea and into the systemic circulation. In a pharmacokinetic study, healthy subjects received oral brinzolamide (1 mg) twice daily for 2 weeks to shorten the time to reach steady-state prior to starting Azarga administration. Following twice daily dosing of Azarga for 13 weeks, the concentrations of brinzolamide in erythrocytes at weeks 4, 10 and 15, averaged 18.8 ± 3.29 microM, 18.1 ± 2.68 microM and 18.4 ± 3.01 microM respectively. Steady-state concentrations of brinzolamide in erythrocytes may not bear a simple relationship to plasma concentrations of the drug, which have been observed to be low and generally below assay quantitation limits (< 10 nanogram/mL) following topical ocular administration in other studies.
At steady state, following administration of Azarga, the mean plasma Cmax and AUC0-12h of timolol were 27% and 28% lower (Cmax: 0.824 ± 0.453 nanogram/mL; AUC0-12h: 4.71 ± 4.29 nanogram.h/mL), respectively in comparison to the administration of timolol 5 mg/mL (Cmax: 1.13 ± 0.494 nanogram/mL; AUC0-12h: 6.58 ± 3.18 nanogram.h/mL). The lower systemic exposure to timolol following Azarga administration is not clinically relevant. Following administration of Azarga, mean Cmax of timolol was reached at 0.79 ± 0.45 hours.

Distribution.

Plasma protein binding of brinzolamide is moderate (about 60%). Brinzolamide is sequestered in red blood cells (RBCs) due to its high affinity binding to CA-II and to a lesser extent to CA-I. Its active N-desethyl metabolite also accumulates in RBCs where it binds primarily to CA-I. The affinity of brinzolamide and metabolite to RBCs and tissue carbonic anhydrase results in low plasma concentrations.
Ocular tissue distribution data in rabbits showed that timolol can be measured in aqueous humour up to 48 hours after administration of Azarga. At steady-state, timolol is detected in human plasma for up to 12 hours after administration of Azarga.

Metabolism.

The metabolic pathways for brinzolamide involve N-dealkylation, O-dealkylations and oxidation of its N-propyl side chain. N-desethyl brinzolamide is a major metabolite of brinzolamide formed in humans, which also binds to CA-I in the presence of brinzolamide and accumulates in RBCs. In vitro studies show that the metabolism of brinzolamide mainly involves CYP3A4 as well as at least four other isozymes (CYP2A6, CYP2B6, CYP2C8 and CYP2C9).
Timolol is metabolised by two pathways. One route yields an ethanolamine side chain on the thiadiazole ring and the other gives an ethanolic side chain on the morpholine nitrogen and a second similar side chain with a carbonyl group adjacent to the nitrogen. Timolol metabolism is mediated primarily by CYP2D6.

Excretion.

Brinzolamide is eliminated primarily by renal excretion (approximately 60%). About 20% of the dose has been accounted for in urine as metabolite. Brinzolamide and N-desethyl-brinzolamide are the predominant components found in the urine along with trace levels (< 1%) of the N-desmethoxypropyl and O-desmethyl metabolites.
Timolol and its metabolites are primarily excreted by the kidneys. Approximately 20% of a timolol dose is excreted in the urine unchanged and the remainder excreted in urine as metabolites. The plasma t½ of timolol is 4.8 hours after administration of Azarga.

5.3 Preclinical Safety Data

Genotoxicity.

Brinzolamide did not display mutagenic potential in bacteria (Ames test) or produce chromosomal damage in vivo (mouse micronucleus test). Brinzolamide did induce forward mutations in the mouse lymphoma assay in vitro in the presence, but not in the absence, of metabolic activation. Brinzolamide was negative in a sister chromatid exchange assay in mice. Timolol was not genotoxic in assays for mutagenicity (Ames test) and clastogenicity (mouse micronucleus and cytogenic assays).

Carcinogenicity.

No carcinogenicity studies have been conducted with the combined components of Azarga.

Brinzolamide.

A 2-year bioassay, in with rats were treated with brinzolamide by oral gavage at doses up to 8 mg/kg/day, revealed no evidence of a carcinogenic effect. A similar study conducted in mice, involving oral dosing at 0, 1, 3 or 10 mg/kg/day for 2 years, revealed a statistically significant increase in urinary bladder tumours in females at 10 mg/kg/day, and dose related proliferative changes in the urinary bladder in females at all dose levels and among males at 10 mg/kg/day. The elevated bladder tumour incidence was primarily due to the increased incidence of a tumour and was considered to be unique to mice.

Timolol.

No evidence of carcinogenicity was observed with timolol maleate at oral doses up to 100 mg/kg/day in rats and up to 50 mg/kg/day in mice. However, there was a statistically significant increase in the incidence of adrenal pheochromocytomas in male rats administered 300 mg/kg/day. In female mice, statistically significant increases in the incidence of benign and malignant pulmonary tumours, benign uterine polyps and mammary adenocarcinomas were found at 500 mg/kg/day. The increased occurrence of mammary adenocarcinomas was associated with elevations in serum prolactin, which occurred in female mice administered oral timolol at 500 mg/kg/day, but not at doses of 50 mg/kg/day. An increased incidence of mammary adenocarcinomas in rodents has been associated with administration of several other therapeutic agents that elevate serum prolactin.

6 Pharmaceutical Particulars

6.1 List of Excipients

Mannitol, carbomer 974P, sodium chloride, tyloxapol, disodium edetate, sodium hydroxide and/or hydrochloric acid (for pH adjustment) purified water and benzalkonium chloride.

6.2 Incompatibilities

Incompatibilities were either not assessed or not identified as part of the registration of this medicine.

6.3 Shelf Life

Discard container 4 weeks after opening.
In Australia, information on the shelf life can be found on the public summary of the Australian Register of Therapeutic Goods (ARTG). The expiry date can be found on the packaging.

6.4 Special Precautions for Storage

Store below 25°C. Refrigerate. Do not freeze.

6.5 Nature and Contents of Container

Azarga is presented in an 8 mL round opaque low density polyethylene bottle dispenser containing 5 mL suspension.
Consumer Medicine Information is supplied with this product.

6.6 Special Precautions for Disposal

In Australia, any unused medicine or waste material should be disposed of in accordance with local requirements.

6.7 Physicochemical Properties

Brinzolamide is a white to off-white, crystalline powder which is very slightly soluble in water at neutral pH.
Timolol maleate is a white to off-white, crystalline powder which is soluble in water, alcohol and practically insoluble in ether.

Chemical structure.

The chemical structure of each active ingredient is represented below:

Brinzolamide.


Chemical name: (R)-4-(ethylamino)-3,4-dihydro-2- (3-methoxypropyl)-2H-thieno[3,2-e]- 1,2-thiazine-6-sulfonamide-1,1-dioxide.
Empirical formula: C12H21N3O5S3.
Molecular weight: 383.51.

Timolol maleate.


Chemical name: (S)-1-(tert-butylamino)-3-[(4-morpholino- 1,2,5-thiadiazol-3-yl)oxy]-2 propanol maleate (1:1) (salt).
Empirical formula: C13H24N4O3S.C4H4O4.
Molecular weight: 432.50.

CAS number.

Brinzolamide: 138890-62-7.
Timolol maleate: 26921-17-5.

7 Medicine Schedule (Poisons Standard)

Prescription Only Medicine.

Summary Table of Changes