Benzos
Benzodiazepines, also known as benzos, downers, nerve pills, and tranks, work by enhancing your brain’s response to a neurotransmitter called gamma-aminobutyric acid (GABA), which reduces the excitability of nerve signals in your brain and slows it down, leading to the relaxation of certain physiological and emotional responses.
Benzodiazepines are a class of drugs known as central nervous system depressants, used to treat a variety of mood disorders and other health conditions including seizures, insomnia, and alcohol withdrawal. While they’re effective in treating these conditions for a short time, benzodiazepines may cause frustrating side effects like drowsiness, loss of libido, and lack of coordination. Long-term use can lead to adverse behavioral symptoms and drug dependence.
Benzodiazepines, also known as benzos, downers, nerve pills, and tranks, work by enhancing your brain’s response to a neurotransmitter called gamma-aminobutyric acid (GABA).1 This reduces the excitability of nerve signals in your brain and slows it down, leading to the relaxation of certain physiological and emotional responses. This results in a calming, tranquilizing feeling.
Benzodiazepines have properties that make them useful in treating a number of health conditions. They can act as a muscle relaxant and anticonvulsant and also have sedative (relaxing), hypnotic (sleep-inducing), and anxiolytic (anti-anxiety) effects.
Alcohol withdrawal symptoms, particularly agitation and anxiety, may sometimes be relieved with a short-term course of benzodiazepines, although the response can vary from person to person. Because of the risk of drug dependence, benzodiazepines are usually prescribed for no more than a couple of weeks.
Certain types of epileptic seizures can sometimes be effectively controlled with Klonopin, Valium, or Ativan. Klonopin offers stronger anticonvulsant action while Valium works faster. Valium has the longest duration of action, while Klonopin and Ativan are considered intermediate-duration benzodiazepines.
Generalized anxiety disorder (GAD) and other anxiety disorders can be treated with benzodiazepines, although they are less effective in achieving long-term control. They shouldn’t be used for more than two to four weeks due to the risk of dependence.
Insomnia can be alleviated over the short term with benzodiazepines but may result in rebound insomnia if overused. Long-term use should be strictly avoided.
Panic disorder may be effectively treated with benzodiazepines as they can alleviate anxiety symptoms much faster than antidepressants. This may be an important factor for those who experience severe or debilitating panic attacks.
Other uses include the inducement of calm before surgery or a medical procedure and the treatment of muscle spasms, irritable bowel syndrome (IBS), and abnormal sleep patterns.
Types of Benzodiazepines
Benzos come in different formulations. Some are short-acting, some are long-acting, and they vary in potency.
The most commonly prescribed benzodiazepines and the conditions they’re typically prescribed to treat include:3
Xanax (alprazolam) treats anxiety disorders and panic disorder, and sometimes agoraphobia (fear of open spaces), depression, and premenstrual syndrome.4
Klonopin (clonazepam) treats panic attacks and seizures.5
Valium (diazepam) is used to treat anxiety, seizures, muscle spasms, and alcohol withdrawal, as well as IBS and panic attacks.6
Ativan (lorazepam) is primarily prescribed for anxiety, but may also be used for seizures, IBS, insomnia, alcohol withdrawal, and to help nausea and vomiting in people receiving cancer treatments.7
Halcion (triazolam) is used as a short-term treatment for insomnia.8
Other benzodiazepines and the conditions they’re typically prescribed to treat include:
Restoril (temazepam), estazolam, and flurazepam are short-term treatments for insomnia.91011
Versed (midazolam) is typically used in children before medical procedures or surgery.12
Librium (chlordiazepoxide) treats anxiety and alcohol withdrawal, as well as IBS.13
Tranxene (clorazepate) is used for anxiety and alcohol withdrawal, and it may be prescribed along with other medications to control seizures.14
Serax (oxazepam) treats anxiety, alcohol withdrawal, and IBS.15
Common Benzodiazepine Side Effects
Most of the side effects of benzodiazepines are related to the depressant effect the drug has on your central nervous system.
Common side effects depend on the medication you’re using but, in general, they include:31
Constipation
Confusion
Depression
Diarrhea
Drowsiness
Dry mouth
Erectile dysfunction16
Fatigue
Headache
Impaired motor skills and coordination
Irritability
Loss of appetite or increased appetite
Low libido
Muscle weakness
Short-term memory loss and impaired cognition
Long-Term Side Effects
Long-term use of benzodiazepines may trigger a worsening of side effects and, in some cases, paradoxical side effects, meaning that you may experience an opposite response to the drug than you previously had. Some of these side effects can adversely affect your mood and behavior, causing an altered perception of yourself, your environment, or your relationships.
Long-term side effects may include:
Acute anxiety
Agoraphobia (the fear of open or public spaces)
Anhedonia (the inability to feel pleasure)
Depression
Inability to think cohesively
Loss of libido
Social phobias
Benzodiazepine Dependence and Withdrawal
Benzodiazepines are a Schedule IV medication due to their risk of physical and psychological addiction. As such, they are usually prescribed for no more than two to four weeks. When they’re taken for longer periods, benzodiazepines can lead to tolerance and dependence, meaning that your body will require more of the drug to achieve the same therapeutic effect. This can lead to abuse and/or dependence. Abuse of these drugs is the highest in people who also use heroin or cocaine.17
If you use any of these drugs for too long, you can experience symptoms of withdrawal if you suddenly stop. Don’t ever stop taking a benzodiazepine without talking to your doctor first.
Your dosage will be gradually tapered off to minimize some of the more profound symptoms of withdrawal, including:18
Abdominal cramps
An altered sense of reality
Confusion and disorientation
Depression
Hallucinations
Increased sensitivity to light, pain, and/or sound
Insomnia
Irritability
Muscle cramps
Nausea and vomiting
Nervousness
Paranoia
Profuse sweating
Seizures and convulsions
Tachycardia (rapid heart rate)
Tingling, burning, or “skin-crawling” sensations
Tremor
Interactions
Not only can they cause dependence, but there are also many substances that can interact with benzodiazepines and cause accidental overdose or even death.
Alcohol and opioid pain relievers, both of which also act as central nervous system depressants, can greatly magnify the effect of benzodiazepines. Together, these drugs may slow your respiration and heart function to a point where they may stop altogether.4
Because of this potentially life-threatening result, benzodiazepines should not be taken with alcohol, opioid drugs, or any other benzodiazepine, unless your doctor has decided that the benefits outweigh the risks in your particular situation.
Be sure to tell your doctor about all the medications, vitamins, supplements, and herbal products you’re taking before you start on a benzodiazepine. Some of these can also cause serious interactions. Your doctor may need to change your dose or closely monitor you while taking a benzodiazepine.
Some of the other medications and herbs that can cause interactions with benzos include:31
Antidepressants
Antihistamines4
Anticonvulsants
Certain antifungals
Certain antibiotics
Opioid cough medicine19
Other sedatives
St. John’s Wort
Benzodiazepine Overdose
Potential symptoms of a benzodiazepine overdose include:20
Altered mental status
Coma
Drowsiness
Problems balancing, walking, or swallowing
Slurred speech
Trouble breathing, especially if another substance was taken with benzodiazepines
If you think someone has overdosed on benzodiazepines, call the Poison Control hotline at 1-800-222-1222 or visit their website for help. However, if the person has fallen down, is having seizures, can’t breathe without difficulty, or is unconscious, call 911 to get immediate emergency help.
Precautions
There are circumstances and conditions in which the use of benzodiazepines should be carefully considered or even avoided. Among them include:214
Breastfeeding: Benzodiazepines do cross over into breast milk and can cause symptoms in your baby, so they should be avoided if possible when you’re breastfeeding.
Depression and/or post-traumatic stress disorder (PTSD): If you’ve been diagnosed with depression or PTSD, you need to be aware that using benzos can create an increased risk of self-harm and suicide, as well as drastic mood changes.
Elderly: In anyone aged 65 years or older, benzodiazepines should be used cautiously and in lower doses due to the increased risk of dependence and increased sensitivity to drug side effects like memory loss, impaired coordination, and loss of cognition.
Pregnancy: Benzodiazepines may cause harm to an unborn baby. Let your doctor know if you’re pregnant, plan to become pregnant, or if you get pregnant while taking benzodiazepines.
Respiratory conditions: If you have an underlying respiratory disorder, you shouldn’t use benzos as they may impair your breathing, sometimes critically. Examples of respiratory conditions include bronchitis, sleep apnea, myasthenia gravis, and chronic obstructive pulmonary disorder (COPD).
If you are having suicidal thoughts, contact the National Suicide Prevention Lifeline at 988 for support and assistance from a trained counselor. If you or a loved one are in immediate danger, call 911.
For more mental health resources, see our National Helpline Database.
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