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Terms Of Use


Brand Name(s) : Librium
Side Effects


Chlordiazepoxide should be used with caution by:

It should not be used by:

  • People with allergies to chlordiazepoxide, other diazepines, or any of the other ingredients
  • People with lung conditions such as acute pulmonary insufficiency
  • People with respiratorydepression (hypoventilation)
  • People with psychiatric conditions
  • People with personality disorders
  • Children under 18 years of age.

Also see list of precautions and interactions


Do not store above 30°C.


What is it used for?

  • Chlordiazepoxide is used to treat severe anxiety in the short term, muscle spasms and sudden alcohol withdrawal.
  • It is a type of medicine called benzodiazepine, also known as a diazepine.
  • It is used to relieve the symptoms of severe anxiety or personality/behavioural disorders.
  • In general this drug is used for the short-term treatment of severe anxiety, which may occur alone or in association with insomnia (sleeplessness) or personality/behavioural disorders.

Listed below are the typical uses of chlordiazepoxide.

  • Short-term (24 weeks) treatment of anxiety that is severe, disabling or subjecting the individual to unacceptable distress, occurring alone or in association with insomnia.
  • Personality/behavioural disorders.
  • Muscle spasms
  • To relieve symptoms of sudden alcohol withdrawal.


How often do I take it?

  • Take the medicine before or with your meals and swallow the capsule(s) with a glass of water.
  • Use this medication for the duration of prescription in order to get the most benefit from it.
  • Remember to use it at the same time each day - unless specifically told otherwise by your doctor.
  • It may take up to 10 to 15 days before the full benefit of this drug takes effect.
  • Certain medical conditions may require different dosage instructions as directed by your doctor.

What dose?

  • Dosage is based on your age, gender, medical condition, response to therapy, and use of certain interacting medicines.

Do I need to avoid anything?

  • Chlordiazepoxide may make you sleepy or affect your concentration. If affected, do not drive or operate machinery.
  • Consult your doctor or pharmacist for more details.

When can I stop?

  • It is important to follow directions from your doctor or pharmacist about stopping this medicine.
  • After a period of usage it is advisable to reduce the dosage gradually.
  • Please consult your doctor for further details.


If any of these persist or you consider them severe then inform your doctor or pharmacist.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

A serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction include: rash, itching/swelling (especially of the face/tongue/throat), dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

The Yellow Card Scheme allows you to report suspected side effects from any type of medicine (which includes vaccines, herbals and over the counter medicines) that you are taking. It is run by the medicines safety watchdog called the Medicines and Healthcare products Regulatory agency (MHRA). Please report any suspected side effect on the Yellow Card Scheme website.


Before taking chlordiazepoxide, tell your doctor or pharmacist if you are allergic to it, to other diazepines, or if you have any other allergies.

This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have:

  • Allergies to chlordiazepoxide, other diazepines, or any of the other ingredients
  • lung conditions such as acute pulmonary insufficiency
  • respiratory depression (hypoventilation)
  • psychiatric conditions
  • personality disorder.

Before using this medication, tell your doctor or pharmacist your medical history, especially any of the following:

  • Lung disease,
  • liver disease,
  • kidney disease,
  • depression or recent bereavement,
  • alcohol or drug abuse,
  • mental illness,
  • if you are pregnant or breastfeeding.

Before having surgery, tell your doctor or dentist that you are taking this medication.

Does alcohol intake affect this drug?

  • Alcohol will increase the sedative effects of chlordiazepoxide and should therefore be avoided whilst taking this medicine.

The elderly: chlordiazepoxide should be used with caution in the elderly as it may make the patient more susceptible to side-effects and confusion.

Pregnancy and breastfeeding - please ensure you read the detailed information below


Chlordiazepoxide is not safe to take if you are pregnant or might become pregnant.

If your doctor has decided that you should receive this medicine during late pregnancy or during labour, your baby might have an irregular heart rate, low body temperature, floppiness and breathing and feeding difficulties. Additionally, if you take this medicine during the latter part of your pregnancy your unborn baby may be at risk of developing dependency to the drug and after birth may be at some risk of developing withdrawal symptoms.

It is sensible to limit use of medication during pregnancy whenever possible. However, your doctor may decide that the benefits outweigh the risks in individual circumstances and after a careful assessment of your specific health situation.

If you have any doubts or concerns you are advised to discuss the medicine with your doctor or pharmacist.


Chlordiazepoxide is not safe to take if you are breastfeeding.

If you have any doubts or concerns you are advised to discuss the medicine with your doctor or pharmacist.


Your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with them first.

This drug should not be used with the following medications because very serious, possibly fatal interactions may occur: none known.

Before using this medication, tell your doctor or pharmacist of all prescription and non-prescription/herbal products you may use, especially of:

  • neuroleptics
  • tranquillisers
  • antidepressants
  • hypnotics
  • analgesics (pain killers)
  • anaesthetics
  • anti-epileptic drugs (particularly hydantoins or barbiturates or combinations including them)
  • cimetidine
  • rifampicin

This information does not contain all possible interactions. Therefore, before using chlordiazepoxide, tell your doctor or pharmacist of all the products you use.


If you think you, or someone you care for, might have accidentally taken more than the recommended dose of chlordiazepoxide or intentional overdose is suspected, contact your local hospital, GP or if in England call 111. In Scotland call NHS 24. In Wales, call NHS Direct Wales. In the case of medical emergencies, always dial 999.


If you miss a dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.

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Source: Selected from data included with permission and copyrighted by Boots UK Limited or TicTac Communications Ltd. This copyrighted material is sourced from a licensed data provider and is not for distribution, except as may be authorised by the applicable terms of use.
CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgement of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse events, nor should it be construed to indicate that use of a particular medicine is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any medicine, changing any diet, or discontinuing any course of treatment.

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