Anti-anxiety medications help reduce the symptoms of anxiety, such as panic attacks or extreme fear and worry. The most common anti-anxiety medications are called benzodiazepines.
Benzodiazepines are a group of medications that can help reduce anxiety and make it easier to sleep. They are also used as a muscle relaxant, to induce sedation for surgery and other medical procedures, and in the treatment of seizures and alcohol withdrawal. Benzodiazepines are also called minor tranquillizers, sedatives or hypnotics. They are the most widely prescribed psychoactive drugs in the world.
The calming effects of benzodiazepines can often be achieved without drugs.
Various kinds of exercise, such as walking, running, yoga or tai chi can help, as can reducing the stress in your life and taking time for relaxing activities such as meditation, reading a book or having a warm bath. Talking with a trusted friend, family member or therapist and working out the problems that are troubling you can also help. Whenever possible, these approaches should be tried first, before benzodiazepines. However, when non-drug approaches are not possible or do not help, benzodiazepines can provide relief.
When used appropriately, benzodiazepines are safe and effective drugs. They do, however, have potential for abuse and can be addictive. For this reason, they are usually only recommended for short-term or occasional use.
A certain amount of anxiety or insomnia is a normal reaction to what is happening in your life. You may worry or feel stressed, and sometimes these feelings can keep you up at night. Most often, these feelings pass and are not a problem. However, these feelings can become a problem when they continue over a longer term, cause severe distress, make you feel physically ill and affect your behaviour. This kind of anxiety may be triggered by a challenging life event. It can also be a symptom of a mental health problem.
The ability to fall asleep and to sleep through the night can be affected by many types of health problems. These include physical conditions that cause pain or trouble breathing, as well as mental health problems. When sleep is disrupted, health can be further affected.
While each situation is unique and different treatment approaches may be called for, benzodiazepines can help to provide relief.
Benzodiazepines enhance the activity of the neurotransmitter GABA—a chemical in the brain that helps you to feel calm. Their effect also produces drowsiness, making it easier to fall asleep and sleep through the night.
The side-effects of benzodiazepines are generally mild and may not be noticed when these drugs are used at low doses.
Common side-effects include:
At higher doses, side-effects can include:
Other possible effects, which are extremely rare, include agitation, hallucinations and nightmares. Reducing the dose can help to reduce side-effects.
Benzodiazepines can make it harder to learn and remember new information and to do certain physical and mental tasks. These abilities return to normal once the effect of the drug wears off.
When used to help you get to sleep, benzodiazepines can have some “hangover” effects, such as morning and daytime drowsiness.
Many types of benzodiazepines are available in Canada. All benzodiazepines work the same way; however, the intensity and duration of their effects vary.
Benzodiazepines most commonly used to treat anxiety disorders are clonazepam (Rivotril)*, alprazolam (Xanax) and lorazepam (Ativan). Also used are bromazepam (Lectopam), oxazepam (Serax), chlordiazepoxide (once marketed as Librium), clorazepate (Tranxene) and diazepam (Valium).
Benzodiazepines used for the treatment of insomnia include lorazepam (Ativan), nitrazepam (Mogadon), oxazepam (Serax), temazepam (Restoril), triazolam (Halcion) and flurazepam (Dalmane).
Another drug used for insomnia is zopiclone (Imovane). This drug is similar to benzodiazepines and has similar side-effects. Zopiclone may have less abuse potential than some benzodiazepines; however, people can still become addicted to this drug.
Benzodiazepines are available in the form of tablets or capsules, which are taken by mouth. Some are also available as a sublingual tablet, which is dissolved under the tongue, or as a solution for injection.
* Medications are referred to in two ways: by their generic name and by their brand or trade names. Brand names available in Canada appear here in brackets. For example, alprazolam (Xanax) and lorazepam (Ativan).
For most people, benzodiazepines are helpful only as a temporary measure, to be used only in the following ways:
Some people may continue to use benzodiazepines for longer, even months or years. Some do so because they continue to find these drugs helpful and have agreed with their prescribing physician that the benefits of continuing to use them outweigh the risks. There are also those who continue to use benzodiazepines over a longer term because the prescribing doctor has not re-examined their continued use. In this instance, ask another doctor to review your prescription.
When used on occasion or daily for a few weeks, benzodiazepines have a low risk of addiction. This risk increases, however, when benzodiazepines are taken regularly for more than a few weeks, especially when they are taken in higher than normal doses. People with a history of substance abuse should avoid or minimize use of benzodiazepines as they are at higher risk of becoming addicted.
Signs of addiction include strong cravings for the effects of the drug, taking more of the drug than intended and continuing to use the drug despite the problems it may cause. Addiction may develop with or without physical dependence.
Physical dependence: When benzodiazepines are taken regularly over a long period of time, the body adapts to the presence of the drug. This is known as physical dependence. Physical dependence, on its own, is not the same as addiction. Signs of physical dependence include tolerance and withdrawal.
Tolerance: People are said to have developed tolerance to a drug when the same dose, taken over time, no longer has the desired effect. With benzodiazepines, it is known that:
Some people who develop tolerance may take higher and higher doses to feel the same intensity of effect as when they started taking the drug. These people may find it difficult to stop using benzodiazepines.
Withdrawal: Withdrawal symptoms of benzodiazepines may be similar to the reasons why the drugs were prescribed in the first place. The severity of withdrawal symptoms depends on the type of benzodiazepine used, the amount used and length of time it is used, and on whether the drug is stopped abruptly. Symptoms can include headache, insomnia, anxiety, tension, sweating, difficulty concentrating, tremor, sensory disturbances, fatigue, stomach upset and loss of appetite. Severe withdrawal symptoms from regular use of benzodiazepines in high doses may include agitation, paranoia, delirium and seizures. Withdrawal symptoms generally begin within a few days after treatment is stopped, and they may continue for two to four weeks or longer.
Take only as directed by your doctor; do not increase your dose.
Once you have slept well for two or three nights in a row, try to get to sleep without taking the medication.
If you have been taking benzodiazepines regularly for a few weeks or more, check with your doctor before reducing or stopping your medication.
Most often, benzodiazepines are prescribed to help people get through stressful situations or to provide relief while waiting for other treatment to take effect. When used in this way, on occasion or daily for a few weeks, most people can stop taking them without difficulty or withdrawal effects.
Stopping use can, however, be hard for some people, even when the use is short term. Problems are most likely to occur when:
People who wish to stop using benzodiazepines after using them regularly over a longer term will need to cut back their use gradually over an extended period of time. This approach reduces withdrawal effects and helps ensure success in stopping. Because the ideal process for cutting down varies depending on the benzodiazepine you are taking, the dose and the length of time you have been taking it, ask your doctor to help you set up a schedule. If the long-term use has been at high doses, stopping use requires medical supervision.
These drugs may interact with other medications. If your doctor or dentist prescribes any medication, inform him or her about the drug you are taking. Check with your pharmacist before using any over-the-counter medication, including herbal products, cold or allergy tablets, or cough syrups.
When taken on their own, the risk of overdose with benzodiazepines is low; however, combining these drugs with other sedatives, such as alcohol, or with medications containing codeine or other opioid drugs, can result in overdose and possible death. Symptoms of overdose include slurred speech, confusion, severe drowsiness, weakness and staggering, slow heartbeat, breathing problems and unconsciousness.
Benzodiazepines can be dangerous when combined with alcohol. Benzodiazepines increase the effects of alcohol, making you more sleepy, dizzy or lightheaded. One danger of this is the increased risk of stumbling, falling and related injuries. Another is the increased risk of overdose. Both alcohol and benzodiazepines slow down the central nervous system, which controls breathing. In overdose, breathing can stop.
Drinking too many caffeinated beverages (i.e., more than four cups of coffee or six cups of tea daily) may counteract the anxiety-reducing effects of benzodiazepines.
If you are taking benzodiazepines to help reduce the distress of a mental health problem, chances are that you want to feel less anxious and get a good night’s sleep. Street drugs, such as marijuana or cocaine, have effects that can worsen symptoms of anxiety and interfere with sleep—making you feel worse, rather than better.
Taking benzodiazepines to enhance the effect of other sedative drugs, such as opioids, is dangerous and increases the risk of overdose and injury.
Benzodiazepines can affect your ability to drive a vehicle and increase the risk of a crash, especially if taken in combination with alcohol or other sedative drugs. The risk is highest when you first start taking benzodiazepines, before you are used to their effect. Avoid driving or operating other machinery if you feel drowsy or slowed down.
There is no clear evidence that benzodiazepines have any effect on sex drive or function.
The risk of birth defects from taking benzodiazepines while pregnant is not known, though it is thought to be very small. If benzodiazepines are used regularly close to the delivery date, the baby may be born drowsy or may have withdrawal symptoms such as restlessness and feeding problems.
Small quantities of benzodiazepines can be passed through breast milk from the mother to the baby. This may cause drowsiness in the baby.
If you are pregnant or breastfeeding, or thinking about becoming pregnant, talk to your doctor about the risks and benefits of continuing or stopping benzodiazepines. If your doctor recommends that you stop taking benzodiazepines, he or she will help you to slowly reduce your dose over time, to avoid withdrawal symptoms.
Benzodiazepines are not recommended for use by children and teens, except to bring sedation prior to surgery or for brief medical procedures. Extra caution should be used when considering giving benzodiazepines to children as these drugs may cause children to become irritable rather than calm.
Sensitivity to the effects of benzodiazepines increases with age. When older adults take these drugs, they may become confused and have reduced muscle co-ordination, putting them at greater risk of falls, hip fractures and motor vehicle crashes.
If an older person has been taking benzodiazepines regularly for a very long time, the process required to stop taking them may be long and difficult. In some cases, a doctor may decide to leave the older person on the medication, with regular assessment of daytime side-effects.
Copyright © 2009, 2012 Centre for Addiction and Mental Health
Your donation will fund the groundbreaking mental health research that is helping people on the path to recovery.
Keep your finger on our pulse – latest CAMH news, discoveries and ways to get involved delivered to your inbox.
Please select a newsletter
Please complete the following:
We look forward to keeping you informed, inspired and involved in all things CAMH.
Together, we have fueled progress, but there is still work to do.