Chlordiazepoxide - a benzodiazepine

Chlordiazepoxide works by affecting the way certain substances in your brain (called neurotransmitters) pass messages to your brain cells. It has a calming effect on various functions of your brain.The calming effect is helpful in people with anxiety, so chlordiazepoxide is sometimes prescribed to ease anxiety. If you have been prescribed it for this reason, you will be prescribed it for a very short period of time.

Chlordiazepoxide also has a muscle-relaxing effect. It is used to help relieve the symptoms of alcohol withdrawal. When you are alcohol-dependent, your body becomes used to lots of alcohol. This means that your body starts to develop withdrawal symptoms 3-8 hours after your last drink, as the effect of the alcohol wears off. So, even if you want to stop drinking, it is often difficult because of the withdrawal symptoms. Detoxification, or 'detox', involves taking a short course of a medicine which helps to prevent withdrawal symptoms when you stop drinking alcohol. The most commonly used medicine for this is chlordiazepoxide.

Some medicines are not suitable for people with certain conditions, and sometimes a medicine can only be used if extra care is taken. For these reasons, before you start taking chlordiazepoxide it is important that your doctor knows:

• If you are pregnant or breast-feeding.
• If you have any breathing problems - for example, if you have a problem where you stop breathing for short periods at night (a condition called sleep apnoea).
• If you have any problems with the way your liver works, or if you have any problems with the way your kidneys work.
• If you have a mental health problem. This includes conditions such as psychosis, depression, obsessive conditions, phobias and personality disorders.
• If you have ever had a drug or alcohol addiction and you are not being prescribed chlordiazepoxide for this reason.
• If you have a condition causing muscle weakness, such as myasthenia gravis.
• If you have ever had an allergic reaction to a medicine.
• If you are taking any other medicines. This includes any medicines which are available to buy without a prescription, as well as herbal and complementary medicines.

• Before you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about chlordiazepoxide, and it will also provide you with a full list of the side-effects which you could experience from taking it.
• Your doctor will tell you what dose of chlordiazepoxide to take, and how often to take it. The directions will also be printed on the label of the pack to remind you about what was said to you. Take your doses exactly as your doctor tells you to. As a guide:
  • If you are taking chlordiazepoxide for anxiety, you will probably be prescribed one tablet/capsule to take three times a day.
  • If you are taking it to prevent alcohol withdrawal symptoms, it is usual to take four doses a day. You will be prescribed a high dose on the first day you stop drinking, then your dose will gradually reduce over the next 5-10 days.
• You can take chlordiazepoxide either with or without food.
• If you forget to take a dose, take it when you remember. If when you remember, it is almost time to take your next dose, leave out the missed dose and take your next dose when it is due. Do not take two doses together to make up for a forgotten dose.

Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains the most common ones associated with chlordiazepoxide. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.

If you experience any other symptoms which you think may be due to the medicine, please speak with your doctor or pharmacist for further advice.

• Keep all medicines out of the reach and sight of children.
• Store in a cool, dry place, away from direct heat and light.