Consumer medicine information

Lorazepam Viatris

Lorazepam

BRAND INFORMATION

Brand name

Lorazepam Viatris

Active ingredient

Lorazepam

Schedule

S4

 

Consumer medicine information (CMI) leaflet

Please read this leaflet carefully before you start using Lorazepam Viatris.

What is in this leaflet

This leaflet answers some common questions about LORAZEPAM VIATRIS.

It does not contain all of the available information. It does not take the place of talking to your doctor or pharmacist.

All medicines have benefits and risks. Your doctor has weighed the risks of you taking LORAZEPAM VIATRIS against the benefits they expect it will have for you.

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

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

What LORAZEPAM VIATRIS is used for

LORAZEPAM VIATRIS tablets contain the active ingredient lorazepam, which belongs to a group of medicines called benzodiazepines. They are thought to work by their action on brain chemicals.

LORAZEPAM VIATRIS is used to relieve anxiety. However anxiety or tension associated with the normal stress of everyday life usually does not require treatment with medicines.

It is also used before surgery to help relax you.

In general, benzodiazepines such as LORAZEPAM VIATRIS should be taken for short periods only (for example 2-4 weeks). Continuous long term use is not recommended unless advised by your doctor. The use of benzodiazepines may lead to dependence on the medicine.

Ask your doctor if you have any questions about why LORAZEPAM VIATRIS has been prescribed for you. Your doctor may have prescribed it for another purpose.

LORAZEPAM VIATRIS is available only with a doctor's prescription.

Before you use LORAZEPAM VIATRIS

When you must not take it

Do not take LORAZEPAM VIATRIS if:

  • you are allergic to lorazepam, any of the ingredients at the end of this leaflet or any other medicine from the benzodiazepine group of medicines
  • you have severe and chronic lung disease
  • you have sleep apnoea, a condition where you have breathing problems when you sleep
  • you are depressed with or without anxiety problems

Lorazepam can increase thoughts of death or suicide.

Do not take LORAZEPAM VIATRIS if the expiry date (Exp.) printed on the pack has passed.

Do not take LORAZEPAM VIATRIS if the packaging is torn or shows signs of tampering.

Do not give this medicine to children unless advised by the child’s doctor. The safety and effectiveness of LORAZEPAM VIATRIS in children under 16 years has not been established.

Before you start to take it

Tell your doctor or pharmacist if you have allergies to:

  • any other medicines,
  • any other substances, such as foods, preservatives or dyes.

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

Do not take LORAZEPAM VIATRIS if you are pregnant or planning to become pregnant unless you and your doctor have discussed the risks and benefits involved.

LORAZEPAM-VIATRIS may affect the development of newborn babies and cause breathing difficulty, muscle stiffness, a drop in body temperature or yellowing of the skin.

Babies born to mothers who take LORAZEPAM-VIATRIS throughout their pregnancy may be at risk of withdrawal symptoms. The baby may require ventilation at birth

Tell your doctor if you become pregnant or are breast-feeding.

Do not take LORAZEPAM VIATRIS if you are breast feeding or planning to breast feed unless you and your doctor have discussed the risks and benefits involved.

Tell your doctor if you have any other medical conditions including:

  • liver, kidney or lung disease
  • blood disorders
  • fits or convulsions
  • severe muscle weakness known as myasthenia gravis
  • low blood pressure
  • glaucoma (high pressure in the eye)
  • depression, psychosis or schizophrenia.

Tell your doctor if you drink alcohol regularly. Alcohol may increase the effects of LORAZEPAM VIATRIS.

If you have not told your doctor or pharmacist about any of the above, tell them before you are given LORAZEPAM VIATRIS.

Taking other medicines

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

Some medicines may interfere with LORAZEPAM VIATRIS, or may affect how well it works.

These include:

  • other sleeping tablets, sedatives or tranquillisers
  • medicines for depression
  • medicines for allergies for example antihistamines or cold tablets
  • pain relievers
  • muscle relaxants
  • medicines to control fits.

These medicines may increase the effects of LORAZEPAM VIATRIS. You may need to take different amounts of your medicine or you may need to take different medicines. Your doctor will advise you.

If you are not sure whether you are taking any of these medicines, check with your doctor or pharmacist. Your doctor and pharmacist have more information on medicines to be careful with or avoid while taking LORAZEPAM VIATRIS.

How to take LORAZEPAM VIATRIS

How much to take

The dose of LORAZEPAM VIATRIS may be different for each person. Your doctor will decide the right dose for you.

For anxiety, the usual daily dose is 2 to 3 mg administered in divided doses. However the daily dose can range from 1 to 10 mg.

For sleeping problems (insomnia) due to anxiety, a dose of 1 to 2 mg taken at bedtime is usually prescribed.

If you are taking LORAZEPAM VIATRIS before surgery the usual dose is 2 to 4 mg the night before surgery. Another dose of 2 to 4 mg may also be given 1 to 2 hours before surgery.

Elderly people may need a lower dose.

Follow all directions given to you by your doctor and pharmacist carefully.

How to take it

Swallow the tablets with a glass of water.

It may be taken with or without food.

When to take it

Your doctor will tell you how many times during the day you need to take LORAZEPAM VIATRIS.

How long to take LORAZEPAM VIATRIS for

Do not take LORAZEPAM VIATRIS for longer than your doctor says. LORAZEPAM VIATRIS is usually used for short periods only (for example 2-4 weeks). Continuous long term use is not recommended unless advised by your doctor. The use of benzodiazepines may lead to dependence on the medicine.

Continue taking LORAZEPAM VIATRIS as long as your doctor recommends it.

If you forget to take LORAZEPAM VIATRIS

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 it as you would normally.

Do not take a double dose to make up for the forgotten dose.

If you have missed more than two doses in a row, speak to your doctor or pharmacist.

If you are unsure about whether to take your next dose, speak to your doctor or pharmacist.

If you are taking LORAZEPAM VIATRIS for insomnia due to anxiety and forget to take LORAZEPAM VIATRIS before you go to bed, do not take any LORAZEPAM VIATRIS if you wake up late in the night or early morning. Taking LORAZEPAM VIATRIS late at night or early in the morning may make it hard for you to wake in the morning. If you have any questions about this, ask your doctor or pharmacist.

If you take too much LORAZEPAM VIATRIS (overdose)

Immediately telephone your doctor, or the Poisons Information Centre (telephone 13 11 26), or go to Accident and Emergency at the nearest hospital, if you think you or anyone else may have taken too much LORAZEPAM VIATRIS. Do this even if there are no signs of discomfort or poisoning. You may need urgent medical attention.

If you take too much LORAZEPAM VIATRIS you may feel drowsy, confused, tired, dizzy, have difficulty breathing, feel weak or become unconscious.

While you are using LORAZEPAM VIATRIS

Things you must do

Take LORAZEPAM VIATRIS exactly as your doctor has prescribed.

Tell any other doctors, dentists and pharmacists who treat you that you are taking this medicine.

If you become pregnant while you are taking LORAZEPAM VIATRIS, tell your doctor immediately.

Tell your doctor or pharmacist as soon as possible if you do not feel well while you are taking LORAZEPAM VIATRIS.

If you are being treated for anxiety, be sure to discuss with your doctor any problems you may have and how you feel, especially if your anxiety attacks are getting worse or more frequent. This will help your doctor to determine the best treatment for you.

Visit your doctor regularly. Your doctor needs to check your progress and see whether you need to keep taking LORAZEPAM VIATRIS.

Always discuss with your doctor any problems or difficulties you have during or after taking LORAZEPAM VIATRIS.

Tell your doctor if, for any reason, you have not taken your medicine exactly as prescribed. Otherwise your doctor may think that it was not effective and change your treatment unnecessarily.

Keep enough LORAZEPAM VIATRIS to last weekends and holidays.

Things you must not do

Do not drive or operate machinery until you know how LORAZEPAM VIATRIS affects you.

This medicine may cause drowsiness or dizziness in some people and therefore may affect alertness.

Make sure you know how you react to LORAZEPAM VIATRIS before you drive a car, operate machinery, or do anything else that could be dangerous if you are drowsy, dizzy or not alert.

Even if you take LORAZEPAM VIATRIS at night, you may still be drowsy or dizzy the next day.

Do not take LORAZEPAM VIATRIS for a longer time than your doctor has prescribed. LORAZEPAM VIATRIS should be taken for short periods only (for example 2 to 4 weeks), unless advised otherwise by your doctor.

Do not change your dose without first checking with your doctor.

Do not stop taking LORAZEPAM VIATRIS or lower the dose, without first checking with your doctor.

Stopping this medicine suddenly may cause some unwanted withdrawal effects. This is more common in patients that have taken high doses over longer periods of time.

Withdrawal symptoms may include insomnia, anxiety, unusual mood, fast heartbeat, panic attacks, dizziness, lack of normal movement, light sensitivity, increased sound and touch sensitivity, abnormal body sensations (e.g. feels of motion, metallic taste), confusion, hallucinations, vomiting, sweating and loss of short-term memory.

Your doctor will slowly reduce your dose before you can stop taking it completely.This will minimise these unwanted withdrawal symptoms.

Do not suddenly stop taking LORAZEPAM VIATRIS if you suffer from epilepsy. Stopping this medicine suddenly may make your epilepsy worse.

Do not use this medicine to treat any other complaints unless your doctor says to.

Do not give LORAZEPAM VIATRIS to anyone else, even if their symptoms seem similar to yours.

Things to be careful of

Be careful when drinking alcohol while you are taking this medicine. If you drink alcohol, symptoms such as dizziness and drowsiness may be worse.

Your doctor may suggest that you avoid alcohol or reduce the amount of alcohol you drink while you are taking LORAZEPAM VIATRIS.

Be careful if you are elderly, unwell or taking other medicines. Some people may experience side effects such as drowsiness, confusion, dizziness and unsteadiness, which may increase the risk of a fall.

Side effects

Tell your doctor or pharmacist as soon as possible if you do not feel well while you are taking LORAZEPAM VIATRIS.

LORAZEPAM VIATRIS helps most people with anxiety but it may have unwanted side effects in some people.

All medicines may 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.

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

If side effects do happen, they are more likely to happen when you first start taking LORAZEPAM VIATRIS. These side effects may go away during treatment as your body adjusts to the dose.

However, tell your doctor if you notice any of the following and they worry you:

  • drowsiness
  • dizziness
  • sleepiness
  • clumsiness or unsteadiness
  • weakness
  • loss of memory.

These are the more common side effects of LORAZEPAM VIATRIS.

Other less common or rare side effects include:

  • skin rashes
  • feeling sick or vomiting
  • outbursts of anger and increased excitement
  • confusion or depression
  • headache
  • sleep disturbances
  • blurred vision
  • low blood pressure
  • dry mouth
  • excessive salivation
  • changes in appetite
  • nausea.

Tell your doctor if you notice anything else that is making you feel unwell when you are taking, or soon after you have finished taking, LORAZEPAM VIATRIS. Other side effects not listed above may occur in some people.

Ask your doctor or pharmacist if there is anything you don’t understand.

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

After taking LORAZEPAM VIATRIS

If you have any queries about any aspect of your medicine, or any questions regarding the information in this leaflet, discuss them with your doctor or pharmacist.

Storage

Keep your tablets in the pack until it is time to take them. If you take the tablets out of the pack they may not keep well.

Keep your tablets in a cool dry place where the temperature stays below 25°C.

Do not store LORAZEPAM VIATRIS or any other medicine in the bathroom or near a sink.

Do not leave LORAZEPAM VIATRIS in the car or on window sills. 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.

Disposal

If your doctor tells you to stop taking LORAZEPAM VIATRIS, or your tablets have passed its expiry date, ask your pharmacist what to do with any that are left over.

Product description

What it looks like

LORAZEPAM VIATRIS 1 mg: white, round, flat, beveled, scored tablets, with the inscription “1.0” on one side.

LORAZEPAM VIATRIS 2.5 mg: white, round, flat, beveled, scored tablets.

Each blister pack contains: 1 mg & 2.5mg – 50 tablets

Ingredients

The active ingredient in LORAZEPAM VIATRIS is lorazepam.

The tablet also contains the following inactive ingredients:

  • maize starch
  • microcrystalline cellulose
  • sodium starch glycollate (Type A)
  • lactose monohydrate
  • povidone
  • crospovidone
  • magnesium stearate
  • polacrillin potassium.

The tablets do not contain gluten, sucrose, tartrazine or any other azo dyes.

Sponsor

Southern Cross Pharma Pty Ltd
Suite 2, Level 2
19-23 Prospect Street
Box Hill, Vic, 3128

Distributor

LORAZEPAM VIATRIS is distributed in Australia by:

Alphapharm Pty Ltd trading as Viatris
Level 1, 30 The Bond
30-34 Hickson Road
Millers Point NSW 2000
www.viatris.com.au
Phone: 1800 274 276

Australian registration numbers:

LORAZEPAM VIATRIS 1 mg
AUST R 304312

LORAZEPAM VIATRIS 2.5 mg
AUST R 304313

Date of preparation:
October 2024.

Published by MIMS November 2024

BRAND INFORMATION

Brand name

Lorazepam Viatris

Active ingredient

Lorazepam

Schedule

S4

 

Notes

Distributed by Alphapharm Pty Ltd

1 Name of Medicine

Lorazepam.

2 Qualitative and Quantitative Composition

Lorazepam Viatris immediate release tablets contain the active ingredient lorazepam.
Each Lorazepam Viatris 1 mg tablet contains 1 mg of lorazepam.
Each Lorazepam Viatris 2.5 mg tablet contains 2.5 mg of lorazepam.
Lorazepam is a white or almost white crystalline powder.
Lorazepam Viatris contains lactose, for the full list of excipients, see Section 6.1 List of Excipients.

3 Pharmaceutical Form

Lorazepam Viatris 1 mg immediate release tablets are white, round, flat, beveled and scored with the inscription "1.0" on one side.
Lorazepam Viatris 2.5 mg immediate release tablets are white, round, flat, beveled and scored tablets.

4 Clinical Particulars

4.1 Therapeutic Indications

Management of anxiety disorders or for the short-term relief of the symptoms of anxiety or anxiety associated with depressive symptoms.
Anxiety or tension associated with the stress of everyday life usually does not require treatment with an anxiolytic. The physician should periodically reassess the usefulness of the drug for the individual patient.
Pre-surgical medication taken the night before surgery and/or 1-2 hours prior to the surgical procedure.

4.2 Dose and Method of Administration

Lorazepam Viatris is administered orally. For optimal results, dose, frequency of administration and duration of therapy should be individualised according to patient response. Dosage should be individualised for maximum beneficial effect. In patients previously treated with anxiolytic agents, higher initial dosages of Lorazepam Viatris may be indicated.
The average daily dosage for treatment of anxiety is 2-3 mg administered in divided doses, however, this may range between 1 and 10 mg.
For insomnia due to anxiety or transient situational stress, a single daily dose of 1-2 mg may be given, usually at bedtime.
For patients with anxiety and/or insomnia, the duration of treatment should not exceed 4 weeks, including tapering off process (see Section 4.4 Special Warnings and Precautions for Use, Duration of treatment).
For elderly or debilitated patients, an initial dosage of 1 or 2 mg/day in divided doses is recommended, to be adjusted as needed and tolerated.
The need for continued therapy with Lorazepam Viatris in patients who have been taking medication for several weeks should be evaluated, periodically.
For pre-surgical medication, a dosage of 2-4 mg of Lorazepam Viatris is recommended the night before surgery and/or 1-2 hours prior to the surgical procedure.
Lorazepam Viatris is not recommended for children.

4.3 Contraindications

Patients with a known hypersensitivity to benzodiazepines.
Patients with chronic obstructive airways disease with incipient respiratory failure.
Patients with sleep apnoea.
Lorazepam should not be used as monotherapy in patients with depression, or symptoms of anxiety associated with depression, due to a risk of suicide (see Section 4.4 Special Warnings and Precautions for Use).

4.4 Special Warnings and Precautions for Use

As with all patients taking CNS-depressant medications, patients receiving lorazepam should be warned not to operate dangerous machinery or motor vehicles until it is known that they do not become drowsy or dizzy from lorazepam therapy. Abilities may be impaired on the day following use.
Following the prolonged use of lorazepam at therapeutic doses withdrawal from the medication should be gradual. An individualised withdrawal timetable needs to be planned for each patient in whom dependence is known or suspected. Periods from four weeks to four months have been suggested. As with other benzodiazepines, when treatment is suddenly withdrawn, a temporary increase of sleep disturbance can occur after use of lorazepam (see Dependence).

Duration of treatment.

In general, benzodiazepines should be prescribed for short periods only (e.g. 2-4 weeks).
For patients with anxiety and/or insomnia the duration of treatment should not exceed 4 weeks (including tapering off process).
Continuous long-term use of lorazepam is not recommended.

Tolerance.

There is evidence that tolerance develops to the sedative effects of benzodiazepines. Tolerance as defined by a need to increase the dose in order to achieve the same therapeutic effect seldom occurs in patients receiving recommended doses under medical supervision. Tolerance to sedation may occur with benzodiazepines especially those with drug seeking behaviour.
After as little as one week of therapy withdrawal symptoms can appear following the cessation of recommended doses (e.g. rebound insomnia following cessation of a hypnotic benzodiazepine).
Although hypotension has occurred only rarely, lorazepam should be administered with caution to patients in whom a drop in blood pressure might lead to cardiac or cerebral complications. This is particularly important in elderly patients.
Transient amnesia or memory impairment has been reported in association with the use of benzodiazepines.
Lorazepam could increase the muscle weakness in myasthenia gravis and should be used with caution in this condition.
Caution should be used in the treatment of patients with acute narrow-angle glaucoma (because of atropine-like side effects).

Use in renal or hepatic impairment.

Patients with impaired renal or hepatic function should use benzodiazepine medication with caution and dosage reduction may be advisable. In rare instances some patients taking benzodiazepines have developed blood dyscrasias, and some have had elevations of liver enzymes. As with other benzodiazepines, periodic blood counts and liver function tests are recommended.

Depression, psychosis and schizophrenia.

Lorazepam is not recommended as primary therapy in patients with depression and psychosis. In such conditions, psychiatric assessment and supervision are necessary if benzodiazepines are indicated. Benzodiazepines may increase depression in some patients, and may contribute to deterioration in severely disturbed schizophrenics with confusion and withdrawal. Suicidal tendencies may be present or uncovered and protective measures may be required. Therefore, benzodiazepines should be used with caution and the prescription size should be limited, in patients with signs and symptoms of a depressive disorder or suicidal tendencies.

CNS and/or paradoxical reactions.

As with other benzodiazepines and CNS active drugs, three idiosyncratic symptom clusters, which may overlap, have been described.

Amnestic symptoms.

Anterograde amnesia with appropriate or inappropriate behaviour;

Confusional states.

Disorientation, derealisation, depersonalization and/or clouding of consciousness; and

Agitational states.

Sleep disturbances, restlessness, irritability, aggression and excitation.
Lorazepam should be discontinued if confusion or agitation occurs.
Paradoxical reactions such as acute rage, stimulation or excitement may occur. Should such reactions occur, lorazepam should be discontinued.

Geriatric or debilitated patients.

Such patients may be particularly susceptible to the sedative effects of benzodiazepines and associated giddiness, ataxia and confusion which may increase the possibility of a fall.

Impaired respiratory function.

Caution in the use of lorazepam is recommended in patients with respiratory depression. In patients with chronic obstructive pulmonary disease, benzodiazepines can cause increased arterial carbon dioxide tension and decreased arterial oxygen tension.

Epilepsy.

Abrupt withdrawal of benzodiazepines in patients with convulsive disorders may be associated with a temporary increase in the frequency and/or severity of seizures.

Use in the elderly.

Lower doses should be used in elderly patients (see Section 4.2 Dose and Method of Administration).

Abuse.

Caution must be exercised in administering lorazepam to individuals known to be addiction prone or those whose history suggests they may increase the dosage on their own initiative. It is desirable to limit repeat prescription without adequate medical supervision.

Dependence.

The use of benzodiazepines may lead to dependence as defined by the presence of a withdrawal syndrome on discontinuation of the drug. Withdrawal symptoms similar in character to those noted with barbiturates and alcohol have occurred following abrupt discontinuation of benzodiazepines. These symptoms can range from insomnia, anxiety, dysphoria, palpitations, panic attacks, vertigo, myoclonus akinesia, hypersensitivity to light, sound and touch, abnormal body sensations (e.g. feelings of motion, metallic taste), depersonalisation, derealisation, delusional beliefs, hyperreflexia and loss of short term memory, to a major syndrome which may include convulsions, tremor, abdominal and muscle cramps, confusional states, delirium, hallucinations, hyperthermia, psychosis, vomiting and sweating. Such manifestations of withdrawal, especially the more serious ones, are more common in those patients who have received excessive doses over a prolonged period. However, withdrawal symptoms have also been reported following abrupt discontinuation of benzodiazepines taken continuously at therapeutic levels. Accordingly, Lorazepam should be terminated by tapering the dose to minimise occurrence of withdrawal symptoms. Patients should be advised to consult with their physician before either increasing the dose or abruptly discontinuing the medication.
Rebound phenomena have been described in the context of benzodiazepine use. Rebound insomnia and anxiety mean an increase in the severity of these symptoms beyond pre-treatment levels following cessation of benzodiazepines. Rebound phenomena in general possibly reflect re-emergence of pre-existing symptoms combined with withdrawal symptoms described earlier. Some patients prescribed benzodiazepines with very short half-lives (in the order of 2 to 4 hours) may experience relatively mild rebound symptoms in between their regular doses. Withdrawal/rebound symptoms may follow high doses taken for relatively short periods.

Concomitant use with alcohol/CNS depressants.

The concomitant use of lorazepam with alcohol or/and CNS depressants should be avoided. Such concomitant use has the potential to increase the clinical effects of lorazepam which may include severe sedation, clinically relevant respiratory and/or cardio-vascular depression (see Section 4.5 Interactions with Other Medicines and Other Forms of Interactions).

Paediatric use.

The safety and effectiveness of lorazepam has not been established in children less than 16 years of age.

Paediatric neurotoxicity.

Some published studies in children have observed cognitive deficits after repeated or prolonged exposures to anaesthetic agents early in life. These studies have substantial limitations, and it is not clear if the observed effects are due to the anaesthetic/analgesic/sedation drug administration or other factors such as the surgery or underlying illness.
Published animal studies of some anaesthetic/analgesic/sedation drugs have reported adverse effects on brain development in early life and late pregnancy. The clinical significance of these nonclinical finding is yet to be determined.
Depending on the drug and patient characteristics, as well as dosage, the elimination phase may be prolonged relative to the period of administration resulting in longer exposure to the drug.

Effects on laboratory tests.

No interference with laboratory tests have been identified or reported with the use of lorazepam.

4.5 Interactions with Other Medicines and Other Forms of Interactions

The benzodiazepines, including lorazepam, produce additive CNS depressant effects when co-administered with other medications which themselves produce CNS depression, e.g. barbiturates, alcohol, sedatives, tricyclic antidepressants, non-selective MAO inhibitors, phenothiazines and other antipsychotics, skeletal muscle relaxants, antihistamines or narcotic analgesics and anaesthetics.
The cytochrome P450 system has not been shown to be involved in the disposition of lorazepam and, unlike many benzodiazepines, pharmacokinetic interactions involving the P450 system have not been observed with lorazepam.
The anticholinergic effects of other drugs including atropine and similar drugs, antihistamines and antidepressants may be potentiated.
Interactions have been reported between some benzodiazepines and anticonvulsants, with changes in the serum concentration of the benzodiazepine or anticonvulsant. It is recommended that patients be observed for altered responses when benzodiazepines and anticonvulsants are prescribed together, and that serum level monitoring of the anticonvulsant be performed more frequently.
Minor EEG changes, usually low voltage fast activity, of no known clinical significance, have been reported with benzodiazepine administration.

4.6 Fertility, Pregnancy and Lactation

Effects on fertility.

A pre-implantation study in rats was performed with oral lorazepam at a 20 mg/kg dose which showed no impairment of fertility.
(Category C)
Benzodiazepines cross the placenta and may cause hypotonia, reduced respiratory function and hypothermia in the newborn infant. Continuous treatment during pregnancy and administration of high doses in connection with delivery should be avoided. Withdrawal symptoms in newborn infants have been reported with this class of drugs.
The use of benzodiazepines during the first trimester of pregnancy should almost always be avoided. If the drug is prescribed to a woman of child-bearing potential, she should be warned to contact her physician regarding discontinuation of the drug if she intends to become or suspects that she is pregnant.
Neonates appear to conjugate lorazepam slowly, the glucuronide being detectable in the urine for more than seven days. Glucuronidation of lorazepam may competitively inhibit the conjugation of bilirubin, leading to hyperbilirubinaemia in the new born.

Non-teratogenic effects.

The use of benzodiazepines during the late phase of pregnancy or at delivery may require ventilation of the infant at birth.
Published animal studies of some anaesthetic/analgesic/sedation drugs have reported adverse effects on brain development in early life and late pregnancy.
Published studies in pregnant and juvenile animals demonstrate that the use of anaesthetic/analgesic and sedation drugs that block NMDA receptors and/or potentiate GABA activity during the period of rapid brain growth or synaptogenesis may result in neuronal and oligodendrocyte cell loss in the developing brain and alterations in synaptic morphology and neurogenesis when used for longer than 3 hours. These studies included anaesthetic agents from a variety of drug classes.
Caution should be exercised when lorazepam is given to breast feeding women. Lorazepam is excreted in human breast milk and may cause drowsiness and feeding difficulties in the infant.

4.7 Effects on Ability to Drive and Use Machines

As with all patients taking CNS-depressant medications, patients receiving lorazepam should be warned not to operate dangerous machinery or motor vehicles until it is known that they do not become drowsy or dizzy from lorazepam therapy. Abilities may be impaired on the day following use.

4.8 Adverse Effects (Undesirable Effects)

More common reactions.

The more common adverse reactions, if they occur, are usually observed at the beginning of therapy and generally decreases in severity or disappears on continued medication or upon decreasing the dose.

Nervous system.

Anterograde amnesia, dizziness, sedation.

Musculo-skeletal.

Unsteadiness, weakness.

Less common reactions.

Autonomic manifestations.

Dry mouth, hypersalivation.

Dermatological.

Rash.

Gastrointestinal.

Nausea, vomiting.

Miscellaneous.

Change in appetite.

Nervous system.

Disorientation, headache, sleep disturbances.

Ocular.

Eye-function disturbances.

Psychiatric.

Agitation, depression.
Paradoxical reactions such as stimulation, excitement or rage rarely occur (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

Overdosage of benzodiazepines is usually manifested by degrees of central nervous system depression ranging from drowsiness to coma. In mild cases, symptoms include drowsiness, mental confusion and lethargy. In more serious cases, symptoms may include ataxia, hypotonia, hypotension, respiratory depression, coma, and very rarely proves fatal.

Treatment.

In the management of overdosage with any medication, it should be borne in mind that multiple agents may have been taken.
Following overdosage with oral benzodiazepines, vomiting should be induced (within one hour) if the patient is conscious or gastric lavage undertaken with the airways protected if the patient is comatose. If there is no advantage in emptying the stomach, activated charcoal should be given to reduce absorption. Hypotension and respiratory depression should be managed according to general principles.
Haemoperfusion and haemodialysis are not useful in benzodiazepine intoxication. The benzodiazepine antagonist flumazenil may be used in hospitalised patients for the reversal of acute benzodiazepine effects. Please consult the flumazenil product information prior to usage.
For information on the management of overdose, contact the Poisons Information Centre on 131126 (Australia).

5 Pharmacological Properties

5.1 Pharmacodynamic Properties

Mechanism of action.

The exact mechanism of action of benzodiazepines has not yet been elucidated; however, benzodiazepines appear to work through several mechanisms. Benzodiazepines presumably exert their effects by binding to specific receptors at several sites within the central nervous system either by potentiating the effects of synaptic or pre-synaptic inhibition mediated by gamma-aminobutyric acid or by directly affecting the action potential generating mechanisms.

Clinical trials.

No data available.

5.2 Pharmacokinetic Properties

Absorption.

Lorazepam is readily absorbed when given orally. Peak concentrations in plasma occur approximately 2 hours following administration. The half-life of lorazepam in human plasma is approximately 12-16 hours. At clinically relevant concentrations, lorazepam is approximately 90% bound to plasma proteins.

Distribution.

The plasma levels of lorazepam are proportional to the dose given. There is no evidence of excessive accumulation of lorazepam on administration up to 6 months nor is there any indication of induction of drug-metabolising enzymes under these conditions. Lorazepam is not a substrate for N-dealkylating enzymes of the cytochrome P450 system nor is it hydroxylated to any significant extent.

Metabolism.

Lorazepam is metabolised in the liver, mainly to the inactive glucuronide of lorazepam.

Excretion.

Seventy to seventy-five per cent of the dose is excreted as the glucuronide in the urine. The glucuronides of lorazepam have no demonstrable CNS activities in animals, and there are no active metabolites of lorazepam.
Studies comparing young and elderly subjects have shown that the pharmacokinetics of lorazepam remain unaltered with advancing age. No changes in absorption, distribution, metabolism and excretion were reported in patients with hepatic disease (hepatitis, alcoholic cirrhosis). As with other benzodiazepines, the pharmacokinetics of lorazepam may change in patients with impaired renal function and the medication should be used with caution.

5.3 Preclinical Safety Data

Genotoxicity.

An investigation of the mutagenic activity of lorazepam on Drosophila melanogaster indicated that it was mutationally inactive.

Carcinogenicity.

No evidence of carcinogenic potential emerged in rats or mice during an 18-month study with oral lorazepam.

6 Pharmaceutical Particulars

6.1 List of Excipients

Lorazepam 1 mg and 2.5 mg tablets contain the following inactive ingredients: maize starch, microcrystalline cellulose, sodium starch glycollate Type A, lactose monohydrate, povidone, crospovidone, magnesium stearate, polacrilin potassium.

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. Protect from light and store in original container.

6.5 Nature and Contents of Container

Lorazepam tablets are available in PA/Al/PVC/Al blister packs.
1 mg and 2.5 mg in blister packs of 50 tablets.

6.6 Special Precautions for Disposal

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

6.7 Physicochemical Properties

Chemical structure.


Chemical name: 7-chloro-5-(2-chlorophenyl)-1,3-dihydro-3-hydroxy-2H-1,4-benzodiazepin-2-one.
Molecular formula: C15H10Cl2N2O2.
Molecular weight: 321.2.

CAS number.

846-49-1.

7 Medicine Schedule (Poisons Standard)

S4 (Prescription Only Medicine).

Summary Table of Changes