Consumer medicine information

Hydroxycarbamide Medsurge

Hydroxycarbamide (hydroxyurea)

BRAND INFORMATION

Brand name

Hydroxycarbamide Medsurge

Active ingredient

Hydroxycarbamide (hydroxyurea)

Schedule

S4

 

Consumer medicine information (CMI) leaflet

Please read this leaflet carefully before you start using Hydroxycarbamide Medsurge.

What is in this leaflet

This leaflet answers some common questions about Hydroxycarbamide Medsurge. It does not contain all the available information.

It does not take the place of talking to your doctor or pharmacist.

All medicines have risks and benefits. Your doctor has weighed the risks of you taking hydroxycarbamide (hydroxyurea) against the benefits they expect it will 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 Hydroxycarbamide (hydroxyurea) is used for

Hydroxycarbamide (hydroxyurea) is used to treat various types of cancers such as melanoma, leukemia and cancer of the ovary.

Hydroxycarbamide Medsurge contains hydroxycarbamide (hydroxyurea), an anti-cancer medicine. It interferes with the replication of cells and causes cell death, particularly in cancer cells.

Hydroxycarbamide (hydroxyurea) may be used alone or in combination with other treatments for cancer. Your doctor will inform you if this is necessary.

Your doctor may have prescribed hydroxycarbamide (hydroxyurea) for another reason.

Ask your doctor if you have any questions about why hydroxycarbamide (hydroxyurea) was prescribed for you.

This medicine is available only with a doctor's prescription.

Hydroxycarbamide (hydroxyurea) is not recommended for use in children as its safety and effectiveness in patients under 18 years of age has not been established.

Before you take hydroxycarbamide (hydroxyurea)

When you must not take it

Do not take hydroxycarbamide (hydroxyurea) if you have an allergy to:

  • hydroxycarbamide (hydroxyurea)
  • any of the ingredients listed at the end of this leaflet.

Do not take hydroxycarbamide (hydroxyurea) if you have marked depression of white blood cells (bone marrow depression) or red blood cells (severe anaemia). Your doctor will be able to advise whether hydroxycarbamide (hydroxyurea) is appropriate in this situation.

Do not take hydroxycarbamide (hydroxyurea) if you are pregnant or intend to become pregnant. Hydroxycarbamide (hydroxyurea) may cause harm to the unborn baby if it is given to a man or woman before conception, or to a pregnant woman. You should use some kind of birth control while you are having hydroxycarbamide (hydroxyurea) and for at least 12 months after you stop using it. Hydroxycarbamide (hydroxyurea) may cause birth defects if either the male or female is using it at the time of conception.

Do not take Hydroxycarbamide Medsurge after the expiry date printed on the pack. If you take this medicine after the expiry date has passed, it may not work as well.

Do not take Hydroxycarbamide Medsurge if the packaging shows signs of tampering.

Before you start to take it

Tell your doctor if you have allergies to any other medicines, foods, preservatives or dyes.

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

  • liver problems
  • kidney problems
  • blood problems or anaemia
  • lowered immunity due to treatment with other medicines used to treat cancer (including radiation therapy)
  • your immune system is not working properly (you get a lot of infections requiring treatment with antibiotics)

Tell your doctor if you have an infection or high temperature. Your doctor may decide to delay your treatment until the infection has gone.

Do not have hydroxycarbamide (hydroxyurea) with any medicine that lowers your immune system, unless you have discussed this with your doctor.

Tell your doctor if you are pregnant or intend to become pregnant.

Tell your doctor if you are breastfeeding or plan to breastfeed. Hydroxycarbamide (hydroxyurea) passes into breast milk. Therefore there is a possibility that the breast-fed baby may be affected.

Tell your doctor if you are a sexually active man. Hydroxycarbamide (hydroxyurea) may cause birth defects if either the male or female is using it at the time of conception. Men who take hydroxycarbamide (hydroxyurea) are advised to use a condom to avoid pregnancy in their partner.

If you have not told your doctor about any of the above, tell them before you start hydroxycarbamide (hydroxyurea).

If you are not sure whether you should have hydroxycarbamide (hydroxyurea), talk to your doctor.

If you have not told your doctor about any of the above, tell them before you start having hydroxycarbamide (hydroxyurea).

Taking other medicines

Tell your doctor or pharmacist if you are taking any other medicines, including vaccinations, or any that you get without a prescription from your pharmacy, supermarket or health food shop.

Some medicines and hydroxycarbamide (hydroxyurea) may interfere with each other. These include:

  • Vaccinations. Hydroxycarbamide (hydroxyurea) may suppress the body's normal defense mechanisms and result in a more severe than normal reaction with the virus
  • Some other medicines that are used to treat other forms of cancer
  • Medicines used to treat gout
  • Medicines used to treat HIV infection including Videx® (didanosine) and Zerit® (stavudine)

These medicines may be affected by hydroxycarbamide (hydroxyurea), or affect how well it works. You may need different amounts of your medicine, or you may need to have different medicines. Your doctor will advise you.

Your doctor and pharmacist have more information on medicines to be careful with or avoid while taking hydroxycarbamide (hydroxyurea).

How to take hydroxycarbamide (hydroxyurea)

How much to take

Your doctor will decide what dose you will receive. Your dose of hydroxycarbamide (hydroxyurea) capsules is worked out based on your body weight and height and on the type of cancer you have. The dose worked out for you may be different to the dose for another patient.

Hydroxycarbamide (hydroxyurea) may be given alone or together with other anti-cancer treatments or drugs.

Ask your doctor if you want to know more about the dose of hydroxycarbamide (hydroxyurea) you receive.

How to take it

Hydroxycarbamide (hydroxyurea) capsules may be given to you at the hospital or surgery, or you may take them yourself at home.

Swallow the capsules whole with a glass of water. Or if you have problems with swallowing the capsules, you can empty the capsule contents into a glass of water, stir and drink it straight away. Some of the materials present in the capsule may float to the surface of the water.

When to take it

Hydroxycarbamide Medsurge is taken as a single dose and can be taken each day, or once every three days. Your doctor will decide how you should take the capsules and will explain this to you.

Take hydroxycarbamide (hydroxyurea) at about the same time each day that you are to take it.

Hydroxycarbamide (hydroxyurea) may or may not be given at the same time as other anti-cancer treatments or agents.

How long to take it

Continue taking your medicine for as long as your doctor tells you.

Several courses of hydroxycarbamide (hydroxyurea) therapy may be needed depending on your response to treatment.

Additional treatment may not be repeated until your blood cell numbers return to acceptable levels and any side effects have been controlled.

Do not stop taking hydroxycarbamide (hydroxyurea) unless your doctor tells you to - even if you feel better.

If you forget to take it

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

Otherwise, take it as soon as you remember, and then go back to taking your medicine as you would normally.

Do not take a double dose to make up for the dose that you missed. This may increase the chance of you getting an unwanted side effect.

If you are not sure what to do, ask your doctor or pharmacist.

If you have trouble remembering to take your medicines, ask your pharmacist for some hints.

If you have too much (overdose)

If you are in hospital hydroxycarbamide (hydroxyurea) will be given to you by the hospital staff, so it is most unlikely that too many capsules would be given. However, if an overdose should be given, your doctor will give you the appropriate treatment.

If you are taking hydroxycarbamide (hydroxyurea) at home - Immediately telephone your doctor or pharmacist or the Poisons Information Centre (telephone 13 11 26) for advice or go to Accident or Emergency at your nearest hospital, if you think that you or someone else may have taken too many hydroxycarbamide (hydroxyurea) capsules. Do this even if there are no signs of discomfort or poisoning. You may need urgent medical attention.

Symptoms of overdose may include acute skin inflammation, soreness, discolouration of the skin, fluid retention associated with the hands & feet followed by scaling of the skin in these areas, soreness & inflammation of the mouth.

While you are taking hydroxycarbamide (hydroxyurea)

Things you must do

Be sure to keep all your doctor's appointments so your progress can be checked. Your doctor may want to check your blood pressure and do some blood and other tests from time to time to check on your progress and detect any unwanted side effects.

Keep follow up appointments with your doctor in order to get the best effect from your treatments.

If you forget an appointment, contact your doctor immediately.

Tell any other doctors, dentists and pharmacists who are treating you that you are taking hydroxycarbamide (hydroxyurea).

If you are about to be started on any new medicine, tell your doctor, dentist or pharmacist that you are taking hydroxycarbamide (hydroxyurea).

If you plan to have surgery that needs a general anaesthetic, tell your doctor or dentist that you are taking hydroxycarbamide (hydroxyurea).

If you become pregnant while having hydroxycarbamide (hydroxyurea), tell your doctor.

Avoid exposing your skin to sunlight. Use appropriate clothing, a hat, and sunscreen if you must go in the sun. Check your skin regularly for any changes. If you notice any changes, tell your doctor.

You must maintain an adequate fluid intake.

Hydroxycarbamide (hydroxyurea) can lower the number of white blood cells and platelets in your blood. This means that you have an increased chance of getting an infection or bleeding. The following precautions should be taken to reduce your risk if infection or bleeding:

  • Avoid people who have infections. Check with your doctor immediately if you think you may be getting an infection, or if you get a fever, chills, cough, hoarse throat, lower back or side pain or find it painful or difficult to urinate.
  • Be careful when using a toothbrush, toothpick or dental floss. Your doctor, dentist, nurse or pharmacist may recommend other ways to clean your teeth and gums. Check with your doctor before having any dental work.
  • Be careful not to cut yourself when you are using sharp objects such as a razor or nail cutters.
  • Avoid contact sports or other situations where you may bruise or get injured.

Things you must not do

Do not give hydroxycarbamide (hydroxyurea) to anyone else, even if they have the same condition as you.

Do not take hydroxycarbamide (hydroxyurea) to treat any other complaints unless your doctor tells you to.

Do not stop taking hydroxycarbamide (hydroxyurea), or lower the dose, without checking with your doctor.

If you empty the contents of the capsules into water for swallowing, do not allow the powder to come into contact with your skin. Also avoid inhaling the contents when opening the capsules. If the powder is accidentally spilled, you should wipe up the powder using a damp paper towel and the paper towel should be disposed of immediately. You should also dispose of the empty capsules immediately after taking your required dosage.

Things to be careful of

Be careful driving or operating machinery until you know how hydroxycarbamide (hydroxyurea) affects you. As with other medicines used to treat cancer, hydroxycarbamide (hydroxyurea) may cause dizziness, light-headedness or tiredness in some people. Make sure you know how you react to hydroxycarbamide (hydroxyurea) before you drive a car, operate machinery, or do anything else that could be dangerous if you are dizzy or light-headed. If this occurs do not drive.

Side effects

Tell your doctor or nurse as soon as possible if you do not feel well while you are taking hydroxycarbamide (hydroxyurea).

Like other medicines that treat cancer, hydroxycarbamide (hydroxyurea) may have unwanted side effects, some of which may be serious. You may need medical treatment if you get some of the side effects.

Ask your doctor to answer any questions you may have.

Tell your doctor or nurse if you notice any of the following and they worry you:

These are the more common side effects of hydroxycarbamide (hydroxyurea).

  • High fever (greater than 39°C) that requires hospitalisation
  • nausea, vomiting
  • diarrhoea or constipation
  • loss of appetite
  • dizziness
  • feeling tired or sleepy
  • fever; high temperature, chills
  • stomach pain or discomfort
  • discolouration or ulcers on the skin
  • decay of the skin or nails
  • nail discolouration

Tell your doctor or nurse as soon as possible if you notice any of the following:

These are very rare side effects, which might possible occur. You may need medical attention.

  • sore mouth
  • frequent infections such as fever, severe chills
  • tiredness, headaches, being short of breath, dizziness
  • convulsions
  • pain in lungs or difficulty breathing coughing, this could be a sign of serious lung disease
  • Systemic lupus erythematosus, which may joint pain and/or swelling, especially in the hands or feet, skin rashes, made worse by being in the sun, sores in the mouth or nose, anaemia (low number of red blood cells).

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

These are very serious side effects. You may need urgent medical attention or hospitalisation.

  • sudden life-threatening allergic reactions; sudden signs of allergy such as rash, itching or hives on the skin, swelling of the face, tongue or other parts of the body, shortness of breath, wheezing or trouble breathing

If you are receiving radiation treatment with hydroxycarbamide (hydroxyurea), or are taking other medications as well as hydroxycarbamide (hydroxyurea), the side effects listed above may occur more frequently or be more severe.

Other side effects not listed above may occur in some patients. Tell your doctor or nurse if you notice anything that is making you feel unwell.

The benefits and side effects of hydroxycarbamide (hydroxyurea) may take some time to occur. Therefore even after you have finished your hydroxycarbamide (hydroxyurea) treatment you should tell your doctor immediately if you notice any of the side effects listed above.

After taking hydroxycarbamide (hydroxyurea)

Storage

Hydroxycarbamide (hydroxyurea) capsules should be stored below 25°C in a cool dry place. The container must be tightly closed.

Do not store Hydroxycarbamide Medsurge or any other medicine in the bathroom or near a sink.

Do not leave it in the car on hot days. 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. Pay particular attention to this when you are opening the capsules to dissolve the contents in water.

Disposal

If your doctor tells you to stop taking Hydroxycarbamide Medsurge, or you find that the expiry date has passed, return any that you have not taken to your treating clinic/ hospital, doctor or pharmacist, so they can be disposed of safely.

Product description

What it looks like

Hydroxycarbamide Medsurge capsules have an opaque pink body and an opaque light green cap containing a white to off-white powder. They are supplied in blister (PVC/Aclar film, sealed with aluminium foil) in pack of 30, 100.

Not all presentations may be marketed.

Ingredients

Active ingredients:
Each capsule contains 500mg of hydroxycarbamide (hydroxyurea).

Inactive ingredients:
Each capsule also contains citric acid, lactose monohydrate, magnesium stearate, disodium phosphate, gelatin, titanium dioxide, sodium lauryl sulfate & capsule colourants (erythrosine, indigo carmine and quinoline yellow).

Sponsor

Australian Sponsor

Medicianz Healthcare Pty Limited
Unit 2, 6-7 Gilda Court
MULGRAVE
VICTORIA 3170

Marketed and distributed by
Medsurge Healthcare Pty Ltd
Tel: 1300 788 261
www.medsurge.com.au

Registration Number

AUST R 313761

This leaflet was prepared in June 2020.

Published by MIMS October 2021

BRAND INFORMATION

Brand name

Hydroxycarbamide Medsurge

Active ingredient

Hydroxycarbamide (hydroxyurea)

Schedule

S4

 

Notes

Distributed by Medsurge Healthcare Pty Ltd

1 Name of Medicine

Hydroxycarbamide (hydroxyurea).

2 Qualitative and Quantitative Composition

Hydroxycarbamide (hydroxyurea) is an antineoplastic agent, available for oral use as capsules containing 500 mg per capsule.

Excipients with known effect.

Lactose monohydrate.
For the full list of excipients, see Section 6.1 List of Excipients.

3 Pharmaceutical Form

Hard capsules containing 500 mg hydroxycarbamide (hydroxyurea); size 0 hard gelatin capsules with an opaque pink body and an opaque light green cap containing a white to off white homogeneous powder.

4 Clinical Particulars

4.1 Therapeutic Indications

Significant tumour response to hydroxycarbamide (hydroxyurea) has been demonstrated in chronic myelocytic leukaemia (pretreatment phase and palliative care) and recurrent, metastatic, or inoperable carcinoma of the ovary.

4.2 Dose and Method of Administration

Because of the rarity in children of chronic myelocytic leukaemia, carcinoma of the ovary, and carcinomas of the head and neck, dosage regimens have not been established.
All dosage should be based on the patient's actual or ideal weight, whichever is less.

Note.

If the patient prefers, or is unable to swallow capsules, the contents of the capsules may be emptied into a glass of water and taken immediately. Some inert material used as a vehicle in the capsule may not dissolve, and may float to the surface.
Elderly patients may require a lower dose regimen.
Patients who take the drug by emptying the contents of the capsule into water should be reminded that this is a potent medication that must be handled with care. Patients must be cautioned not to allow the powder to come in contact with the skin and mucous membranes, including avoidance of inhaling the powder when opening the capsules. People who are not taking hydroxycarbamide (hydroxyurea) capsule(s) should not be exposed to it. To decrease the risk of exposure, wear disposable gloves when handling hydroxycarbamide (hydroxyurea) capsule(s), or blister packs containing hydroxycarbamide (hydroxyurea) capsule(s). Anyone handling hydroxycarbamide (hydroxyurea) capsule(s) should wash their hands before and after contact with the blister packs or capsules. If the powder is spilled, it should be immediately wiped up with a damp towel and disposed of in a closed container, such as a plastic bag, as should the empty capsules. The medication, particularly the open capsules, should be kept away from children and pets.
Concurrent use of hydroxycarbamide (hydroxyurea) with other myelosuppressive agents may require adjustments of dosages.

Solid tumours.

Intermittent therapy.

80 mg/kg administered orally as a single dose every third day.

Continuous therapy.

20 to 30 mg/kg administered orally as a single dose daily.
The intermittent dosage schedule offers the advantage of reduced toxicity since patients on this dosage regimen have rarely required complete discontinuance of therapy because of toxicity.

Concomitant therapy with irradiation (carcinoma of the head and neck).

80 mg/kg administered orally as a single dose every third day.
Administration of hydroxycarbamide (hydroxyurea) should be begun at least seven days before initiation of irradiation and continued during radiotherapy as well as indefinitely afterwards provided that the patient may be kept under adequate observation and evidences no unusual or severe reactions.
Irradiation should be given at the maximum dose considered appropriate for the particular therapeutic situation, adjustment of irradiation dosage is not usually necessary when hydroxycarbamide (hydroxyurea) is used concomitantly.

Resistant chronic myelocytic leukaemia.

Continuous therapy.

Until the intermittent therapy regimen has been evaluated, continuous therapy (20 to 30 mg/kg administered orally as a single dose daily) is recommended.
An adequate trial period for determining the antineoplastic effectiveness of hydroxycarbamide (hydroxyurea) is six weeks of therapy. When there is regression in tumour size or arrest in tumour growth, therapy should be continued indefinitely. Therapy should be interrupted if the white blood cell count drops below 2500/mm3, or the platelet count below 100,000/mm3. In these cases, the counts should be rechecked after three days, and therapy resumed when the counts rise significantly toward normal values. Since the haematopoietic rebound is prompt, it is usually necessary to omit only a few doses. If prompt rebound has not occurred during combination hydroxycarbamide (hydroxyurea) capsule(s) and irradiation therapy, irradiation may also be interrupted. However, the need for postponement of irradiation has been rare; radiotherapy has usually been continued using the recommended dosage and technique.
Anaemia, if it occurs, should be corrected with whole blood replacement, without interrupting hydroxycarbamide (hydroxyurea) therapy. Because haematopoiesis may be compromised by extensive irradiation or by other antineoplastic agents, it is recommended that hydroxycarbamide (hydroxyurea) be administered cautiously to patients who have recently received extensive radiation therapy or chemotherapy with other cytotoxic drugs.
Pain or discomfort from inflammation of the mucous membranes at the irradiated site (mucositis) is usually controlled by measures such as topical anaesthetics and orally administered analgesics. If the reaction is severe, hydroxycarbamide (hydroxyurea) therapy may be temporarily interrupted; if it is extremely severe, irradiation therapy may, in addition, be temporarily postponed. However, it has rarely been necessary to terminate these therapies.
Severe gastric distress, such as nausea, vomiting, and anorexia, resulting from combined therapy may usually be controlled by temporary interruption of hydroxycarbamide (hydroxyurea) administration; rarely has the additional interruption of irradiation been necessary.

Renal insufficiency.

There are no data that support specific guidance for dosage adjustment in patients with impaired renal function. Since renal excretion is a pathway of elimination, consideration should be given to decreasing the dosage in this population. Close monitoring of haematologic parameters is advised.

Hepatic insufficiency.

There are no data that support specific guidance for dosage adjustment in patients with impaired hepatic function. Close monitoring of haematologic parameters is advised.

4.3 Contraindications

Hydroxycarbamide (hydroxyurea) is contraindicated in patients with marked bone marrow depression, i.e. leucopoenia (< 2500 WBC/mm3), thrombocytopenia (< 100,000/mm3), or severe anaemia.
A previous hypersensitivity to hydroxycarbamide (hydroxyurea) or any other component of its formulation.

4.4 Special Warnings and Precautions for Use

Concurrent use of hydroxycarbamide (hydroxyurea) and other myelosuppressive agents or radiation therapy may increase the likelihood of bone marrow depression as other adverse events.
Treatment with hydroxycarbamide (hydroxyurea) should not be initiated if bone marrow function is markedly depressed (see Section 4.3 Contraindications). Bone marrow suppression may occur, and leucopoenia is generally its first and most common manifestation. Thrombocytopenia and anaemia occur less often, and are seldom seen without a preceding leucopoenia. However, the recovery from myelosuppression is rapid when therapy is interrupted. It should be borne in mind that bone marrow depression is more likely in patients who have previously received radiotherapy or cytotoxic cancer chemotherapeutic agents; hydroxycarbamide (hydroxyurea) should be used cautiously in such patients.
Patients who have received irradiation therapy in the past may have an exacerbation of post irradiation erythema.
Cases of haemolytic anaemia in patients treated with hydroxycarbamide for myeloproliferative diseases have been reported (see Section 4.8 Adverse Effects (Undesirable Effects)). Patients who develop persistent anaemia should have laboratory tests evaluated for haemolysis. In the setting of confirmed diagnosis of haemolytic anaemia, hydroxycarbamide (hydroxyurea) should be discontinued.
Fatal and nonfatal pancreatitis have occurred in HIV-infected patients during therapy with hydroxycarbamide (hydroxyurea) and didanosine, with or without stavudine. Hepatotoxicity and hepatic failure resulting in death have been reported during post-marketing surveillance in HIV-infected patients treated with hydroxycarbamide (hydroxyurea) and other antiretroviral agents. Fatal hepatic events were reported most often in patients treated with the combination of hydroxycarbamide (hydroxyurea), didanosine, and stavudine. This combination should be avoided. Peripheral neuropathy, which was severe in some cases, has been reported in HIV-infected patients receiving hydroxycarbamide (hydroxyurea) in combination with antiretroviral agents, including didanosine, with or without stavudine.
Interstitial lung disease including pulmonary fibrosis, lung infiltration, pneumonitis, and alveolitis/allergic alveolitis have been reported in patients treated for myeloproliferative neoplasm and may be associated with fatal outcome. Patients developing pyrexia, cough, dyspnea, or other respiratory symptoms should be closely monitored, investigated and treated. Promptly discontinue hydroxycarbamide (hydroxyurea) and treat with corticosteroids to resolve the pulmonary events (see Section 4.8 Adverse Effects (Undesirable Effects)).
Severe anaemia must be corrected with whole blood replacement before initiating therapy with hydroxycarbamide (hydroxyurea).
Erythrocytic abnormalities: megaloblastic erythropoiesis, which is self-limiting, is often seen early in the course of hydroxycarbamide (hydroxyurea) therapy. The morphologic change resembles pernicious anaemia, but it is not related to vitamin B12 or folic acid deficiency. The macrocytosis may mask the incidental development of folic acid deficiency; regular determinations of serum folic acid are recommended. Hydroxycarbamide (hydroxyurea) may also delay plasma iron clearance and reduce the rate of iron utilisation by erythrocytes, but it does not appear to alter the erythrocyte survival time.
Elderly patients may be more sensitive to the effects of hydroxycarbamide (hydroxyurea), and may require a lower dosage regimen.
In patients receiving long-term therapy with hydroxycarbamide (hydroxyurea) for myeloproliferative disorders, such as polycythemia vera and thrombocythemia, secondary leukemia has been reported. It is unknown whether this leukemogenic effect is secondary to hydroxycarbamide (hydroxyurea) or associated with the patients' underlying disease.
Therapy with hydroxycarbamide (hydroxyurea) requires close supervision. The complete status of the blood, including bone marrow examination, if indicated, as well as kidney function and liver function should be determined prior to, and repeatedly during, treatment. The determination of the haemoglobin level, total leucocyte counts, and platelet counts should be performed at least once a week throughout the course of hydroxycarbamide (hydroxyurea) therapy.
If the white blood cell count decreases to less than 2500/mm3, or the platelet count to less than 100,000/mm3, therapy should be interrupted until the values rise significantly toward normal levels. Anaemia, if it occurs, should be managed with whole blood replacement, without interrupting hydroxycarbamide (hydroxyurea) therapy.
Since hydroxycarbamide (hydroxyurea) may cause drowsiness and other neurologic effects alertness may be impaired in driving or in operating machinery.
Patients should be advised to maintain adequate fluid intake. Patients should consult with their physician or pharmacist regarding missed doses.
Hydroxycarbamide (hydroxyurea) is not indicated for the treatment of HIV-infection; however, if HIV-infected patients are treated with hydroxycarbamide (hydroxyurea), and in particular, in combination with didanosine and/or stavudine, close monitoring for signs and symptoms of pancreatitis and hepatotoxicity is recommended. Patients who develop signs and symptoms of pancreatitis or hepatotoxicity should permanently discontinue therapy with hydroxycarbamide (hydroxyurea) (see Section 4.4 Special Warnings and Precautions for Use; Section 4.8 Adverse Effects (Undesirable Effects)).
Cutaneous vasculitic toxicities including vasculitic ulcerations and gangrene have occurred in patients with myeloproliferative disorders during therapy with hydroxycarbamide (hydroxyurea). These vasculitic toxicities were reported most often in patients with a history of or currently receiving interferon therapy. Due to potentially severe clinical outcomes for the cutaneous vasculitic ulcers reported in patients with myeloproliferative disease, hydroxycarbamide (hydroxyurea) should be discontinued if cutaneous vasculitic ulcerations develop and alternative cytoreductive agents should be initiated as indicated.

Interference with continuous glucose monitoring systems.

Hydroxycarbamide (hydroxyurea) may falsely elevate sensor glucose results from certain continuous glucose monitoring (CGM) systems and may lead to hypoglycaemia if sensor glucose results are relied upon to dose insulin.
If a patient using a CGM is to be prescribed hydroxycarbamide (hydroxyurea), consult with the CGM prescriber about alternative glucose monitoring methods.

Use in hepatic impairment.

No information available.

Use in renal impairment.

Hydroxycarbamide (hydroxyurea) should be used with caution in patients with marked renal dysfunction.

Use in the elderly.

Elderly patients may be more sensitive to the effects of hydroxycarbamide (hydroxyurea), and may require a lower dosage regimen.

Paediatric use.

Safety and efficacy have not been established in children.

Effects on laboratory tests.

Studies have shown that there is an analytical interference of hydroxycarbamide (hydroxyurea) with the enzymes (urease, uricase, and lactic dehydrogenase) used in the determination of urea, uric acid and lactic acid, rendering falsely elevated results of these in patients treated with hydroxycarbamide (hydroxyurea). (See Section 4.5 Interactions with Other Medicines and Other Forms of Interactions.)

4.5 Interactions with Other Medicines and Other Forms of Interactions

Concurrent use of hydroxycarbamide (hydroxyurea) and other myelosuppressive agents or radiation therapy may increase the likelihood of bone marrow depression or other adverse events (see Section 4.4 Special Warnings and Precautions for Use).

Vaccinations.

Concomitant use of hydroxycarbamide (hydroxyurea) capsule(s) with a live virus vaccine may potentiate the replication of the vaccine virus and/or may increase the adverse reaction of the vaccine virus because normal defense mechanisms may be suppressed by hydroxycarbamide (hydroxyurea) capsule(s). Vaccination with a live vaccine in a patient taking hydroxycarbamide (hydroxyurea) capsule(s) may result in severe infection. Patient's antibody response to vaccines may be decreased. The use of live vaccines should be avoided and individual specialist advice sought.

Other interactions.

Studies have shown that there is an analytical interference of hydroxycarbamide (hydroxyurea) with the enzymes (urease, uricase, and lactic dehydrogenase) used in the determination of urea, uric acid and lactic acid, rendering falsely elevated results of these in patients treated with hydroxycarbamide (hydroxyurea). Since hydroxycarbamide (hydroxyurea) may raise the serum uric acid level, dosage adjustment of uricosuric medication may be necessary.
There is increased risk of fatal systemic vaccine disease with the concomitant use of live vaccines. Live vaccines are not recommended in immunosuppressed patients.

4.6 Fertility, Pregnancy and Lactation

Effects on fertility.

Azoospermia or oligospermia, sometimes reversible, have been observed in men. Male patients should be informed about the possibility of sperm conservation before the start of the therapy.
Hydroxycarbamide (hydroxyurea) may be genotoxic. Men under therapy are advised to use safe contraceptive measures during and at least 1 year after therapy (see Section 4.8 Adverse Effects (Undesirable Effects)).
Female patients of reproductive potential should be counselled to use effective contraception during therapy and for at least 6 months after therapy.
(Category D)
Drugs which affect DNA synthesis, such as hydroxycarbamide (hydroxyurea), may be potential mutagenic agents. The physician should carefully consider this possibility before administering this drug to male or female patients who may contemplate conception.
Hydroxycarbamide (hydroxyurea) has been demonstrated to be a potent teratogenic agent in animals and can cause foetal harm when administered to a pregnant woman. Therefore, hydroxycarbamide (hydroxyurea) should not be used in women who are or may become pregnant unless in the judgement of the physician the potential benefits outweigh the possible hazards. Women of childbearing potential should be advised to avoid becoming pregnant while taking hydroxycarbamide (hydroxyurea).
Hydroxycarbamide (hydroxyurea) is excreted in human milk. Because of the potential for serious adverse reactions in nursing infants from hydroxycarbamide (hydroxyurea), a decision should be made whether to discontinue nursing or to discontinue the drug, 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.

4.8 Adverse Effects (Undesirable Effects)

Adverse reactions have been primarily bone marrow depression (leucopoenia, anaemia, and occasionally thrombocytopenia), haemolytic anaemia and less frequently gastrointestinal symptoms (stomatitis, anorexia, nausea, vomiting, diarrhoea, and constipation), and dermatological reactions such as maculopapular rash, facial erythema, peripheral erythema, hyperpigmentation, erythema, atrophy of skin and nails, nail pigmentation, skin ulceration, dermatomyositis-like skin changes, scaling, cutaneous lupus erythematosus and violet papules have been observed. Skin cancer has also been reported rarely. Dysuria and alopecia occur very rarely.
Large doses may produce moderate drowsiness. Neurological disturbances have occurred extremely rarely and were limited to headache, dizziness, disorientation, hallucinations and convulsions.
Hydroxycarbamide (hydroxyurea) occasionally may cause temporary impairment of renal tubular function accompanied by elevations in serum uric acid, BUN, and creatinine levels. Abnormal BSP retention has been reported.
Fever, chills, malaise, asthenia, azoospermia, oligospermia, cholestasis, hepatitis, tumour lysis syndrome, and elevation of hepatic enzymes have also been reported.
Adverse reactions observed with combined hydroxycarbamide (hydroxyurea) and irradiation therapy are similar to those reported with the use of hydroxycarbamide (hydroxyurea) alone. These effects primarily include bone marrow depression (anaemia and leucopoenia) and gastric irritation. Almost all patients receiving an adequate course of combined hydroxycarbamide (hydroxyurea) and irradiation therapy will demonstrate concurrent leucopoenia. Platelet depression (less than 100,000 cells/mm3) has occurred rarely and only in the presence of marked leucopoenia. Gastric distress has also been reported with irradiation alone and in combination with hydroxycarbamide (hydroxyurea) therapy.

Musculoskeletal and connective tissue disorders.

Systemic lupus erythematosus.

Hypersensitivity.

Drug-induced fever.

High fever (> 39°C) requiring hospitalisation in some cases has been reported concurrently with gastrointestinal, pulmonary, musculoskeletal, hepatobiliary, dermatological or cardiovascular manifestations. Onset typically occurred within 6 weeks of initiation and resolved promptly after discontinuation of hydroxycarbamide (hydroxyurea). Upon re-administration fever reoccurred within 24 hours.
It should be borne in mind that therapeutic doses of irradiation alone produce the same adverse reactions as hydroxycarbamide (hydroxyurea); combined therapy may cause an increase in the incidence and severity of these side effects.
Although inflammation of the mucous membranes at the irradiated site (mucositis) is attributed to irradiation alone, some investigators believe that the more severe cases are due to combination therapy.

Respiratory.

The association of hydroxycarbamide (hydroxyurea) with the development of acute pulmonary reactions consisting of diffuse pulmonary infiltrates fibrosis, fever and dyspnoea has been rarely reported.
Pulmonary oedema, lung infiltration, interstitial lung disease, pneumonitis, alveolitis, allergic alveolitis and cough have also been reported.
Fatal and nonfatal pancreatitis and hepatotoxicity, and severe peripheral neuropathy have been reported in HIV-infected patients who received hydroxycarbamide (hydroxyurea) in combination with anti-retroviral agents, in particular, didanosine plus stavudine. Patients treated with hydroxycarbamide (hydroxyurea) in combination with didanosine, stavudine, and indinavir showed a median decline in CD4 cells of approximately 100/mm3 (see Section 4.4 Special Warnings and Precautions for Use).
Cutaneous vasculitic toxicities including vasculitic ulcerations and gangrene have occurred in patients with myeloproliferative disorders during therapy with hydroxycarbamide (hydroxyurea). These vasculitic toxicities were reported most often in patients with a history of or currently receiving interferon therapy (see Section 4.4 Special Warnings and Precautions for Use).

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 http://www.tga.gov.au/reporting-problems.

4.9 Overdose

Acute mucocutaneous toxicity has been reported in patients receiving hydroxycarbamide (hydroxyurea) at dosages several times the therapeutic dose. Soreness, violet erythema, oedema on palms and foot soles followed by scaling of hands and feet, severe generalized hyperpigmentation of skin, and stomatitis have also been observed.
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.

The precise mechanism by which hydroxycarbamide (hydroxyurea) produces its cytotoxic effects cannot, at present, be described. However, the reports of various studies in tissue culture, rats and man lend support to the hypothesis that hydroxycarbamide (hydroxyurea) causes an immediate inhibition of DNA synthesis without interfering with the synthesis of ribonucleic acid or of protein. This hypothesis explains why, under certain conditions, hydroxycarbamide (hydroxyurea) may induce teratogenic effects.
Three mechanisms of action have been postulated for the increased effectiveness of concomitant use of hydroxycarbamide (hydroxyurea) therapy with irradiation on squamous cell (epidermoid) carcinomas of the head and neck. In vitro studies utilising Chinese hamster cells suggest that hydroxycarbamide (hydroxyurea) (1) is lethal to normally radioresistant S-stage cells and (2) holds other cells of the cell cycle in the G1 or pre-DNA synthesis stage where they are most susceptible to the effects of irradiation. The third mechanism of action has been theorised on the basis of in vitro studies of HeLa cells; it appears that hydroxycarbamide (hydroxyurea), by inhibition of DNA synthesis, hinders the normal repair process of cells damaged but not killed by irradiation, thereby decreasing their survival rate; RNA and protein synthesis have shown no alteration.

Clinical trials.

No data available.

5.2 Pharmacokinetic Properties

Absorption.

After oral administration in man, hydroxycarbamide (hydroxyurea) is readily absorbed from the gastrointestinal tract.

Distribution.

The drug reaches peak serum concentrations within 2 hours; by 24 hours the concentration in the serum is essentially zero.

Metabolism.

No information available.

Excretion.

Approximately 80% of an oral or intravenous dose of 7 to 30 mg/kg may be recovered in the urine within 12 hours.

5.3 Preclinical Safety Data

Genotoxicity.

Hydroxycarbamide (hydroxyurea) is unequivocally genotoxic and a presumed transspecies carcinogen which implies a carcinogenic risk to humans.

Carcinogenicity.

In patients receiving long-term hydroxycarbamide (hydroxyurea) for myeloproliferative disorders, such as polycythemia vera and thrombocythemia, secondary leukemia has been reported; it is unknown whether this leukemogenic effect is secondary to hydroxycarbamide (hydroxyurea) or the patient's underlying disease. Skin cancer has also been reported in patients receiving long-term hydroxycarbamide (hydroxyurea). Patients should be advised to protect skin from sun exposure, conduct self-inspection of the skin and be screened from secondary malignancies during routine follow-up visits.

6 Pharmaceutical Particulars

6.1 List of Excipients

Lactose monohydrate, citric acid, dibasic sodium phosphate, magnesium stearate. Capsule contains gelatin, titanium dioxide, sodium lauryl sulfate and capsule colourants (Erythrosine, Indigo carmine and, Quinoline yellow).

6.2 Incompatibilities

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

6.3 Shelf Life

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.

6.5 Nature and Contents of Container

Blister: PVC/Aclar film, sealed with aluminium foil in pack 30, 100.
Not all presentations may be marketed.

6.6 Special Precautions for Disposal

In Australia, any unused medicine or waste material should be disposed of by taking to your local pharmacy.

Guidelines for proper handling and disposal of anticancer drugs.

Procedures for proper handling and disposal of anticancer drugs should be considered.
To minimize the risk of dermal exposure, always wear impervious gloves when handling blister packs containing hydroxycarbamide (hydroxyurea) capsules. This includes all handling activities in clinical settings, pharmacies, store rooms, and home healthcare settings, including during unpacking and inspection, transport within a facility and dose preparation and administration.

6.7 Physicochemical Properties

Hydroxycarbamide (hydroxyurea) is an essentially tasteless, white to off-white crystalline powder. It is hygroscopic and freely soluble in water, but practically insoluble in alcohol.

Chemical structure.


CAS number.

127-07-1.

7 Medicine Schedule (Poisons Standard)

Schedule 4 - Prescription Only Medicine.

Summary Table of Changes