Clorazepate Side Effects: What's Normal and What's Not

Clorazepate (brand name Tranxene) is a benzodiazepine prescribed for anxiety disorders, partial seizures, and acute alcohol withdrawal. Like all benzodiazepines, it comes with side effects—some are mild and temporary, while others require immediate medical attention.

This guide breaks down what to expect, what to watch for, and when to contact your doctor.

What Is Clorazepate?

Clorazepate Dipotassium is a long-acting benzodiazepine that works by enhancing the calming neurotransmitter GABA in your brain. It's available as a generic and in brand form (Tranxene T-Tab) in 3.75 mg, 7.5 mg, and 15 mg tablets. Because it's converted in your stomach to its active form (nordiazepam), which has a half-life of about 2 days, its effects last longer than many other benzodiazepines.

For a deeper look at what Clorazepate is and how it's used, check out our full guide.

Common Side Effects

Most people experience some side effects when starting Clorazepate, especially during the first week or two. These are usually mild and often improve as your body adjusts:

• Drowsiness — The most frequently reported side effect. It's most noticeable when you first start the medication or when your dose is increased.
• Dizziness — You may feel lightheaded, especially when standing up quickly.
• Blurred vision — Temporary visual changes can occur.
• Dry mouth — A common benzodiazepine effect. Staying hydrated and using sugar-free gum can help.
• Upset stomach — Nausea or stomach discomfort may occur, especially on an empty stomach.
• Fatigue — Feeling unusually tired or sluggish is common early on.
• Confusion — Mild difficulty concentrating or thinking clearly, particularly at higher doses.
• Headache — Usually mild and responds to over-the-counter pain relief.

These side effects don't mean the medication isn't working or that you need to stop. However, if any of them are severe or don't improve after a couple of weeks, talk to your doctor about adjusting your dose.

Serious Side Effects

Some side effects are more concerning and may require immediate medical attention. Contact your doctor right away—or call 911—if you experience:

• Respiratory depression — Slow, shallow, or difficult breathing. This risk is highest when Clorazepate is taken with opioids, alcohol, or other CNS depressants. The FDA has issued a boxed warning about this.
• Severe drowsiness or sedation — If you can't stay awake or are difficult to rouse, this goes beyond normal drowsiness.
• Paradoxical reactions — Some people experience the opposite of what you'd expect: increased agitation, hostility, aggression, or anxiety. This is more common in children and older adults.
• Seizures — Ironically, seizures can occur if Clorazepate is stopped abruptly. Never stop taking Clorazepate suddenly without medical supervision.
• Suicidal thoughts or behavior — Like all anticonvulsants and some anxiolytics, Clorazepate carries a risk of suicidal ideation. Seek help immediately if you notice changes in mood or thoughts of self-harm.
• Signs of dependence or withdrawal — Increased anxiety, insomnia, tremors, sweating, and irritability can signal physical dependence. The FDA boxed warning emphasizes that all benzodiazepines carry risks of dependence and potentially life-threatening withdrawal.
• Allergic reactions — Hives, swelling of the face or throat, or difficulty breathing require emergency care.

Side Effects in Specific Populations

Older Adults

Elderly patients are more sensitive to Clorazepate. The active metabolite nordiazepam has a long half-life (~2 days), which means it can accumulate and increase the risk of falls, excessive sedation, and confusion. Lower starting doses are recommended.

Pregnant and Breastfeeding Women

Clorazepate may cause fetal harm and should be avoided during the first trimester of pregnancy. Use late in pregnancy can lead to neonatal withdrawal symptoms. Clorazepate is not recommended during breastfeeding.

Children and Adolescents

Clorazepate is not approved for anxiety in patients under 18 or for seizures in children under 9. Paradoxical reactions (agitation, hyperactivity) may be more common in younger patients.

Liver or Kidney Problems

Because nordiazepam is processed by the liver and has a long half-life, patients with hepatic or renal impairment should use Clorazepate with extra caution and may need dose adjustments.

How to Manage Side Effects

There are practical steps you can take to minimize side effects while getting the benefit of Clorazepate:

• Start low, go slow — Your doctor will likely start you at a low dose and increase gradually. This reduces the intensity of initial side effects.
• Take it at bedtime — If drowsiness is your main issue, ask your doctor about taking your dose at night. The 15 mg single bedtime dose is an option for some patients.
• Avoid alcohol completely — Alcohol combined with Clorazepate can cause dangerous respiratory depression. There is no safe amount.
• Be careful with other medications — Check for drug interactions before taking anything new, including over-the-counter medications and supplements.
• Don't drive until you know how it affects you — Drowsiness and dizziness can impair your ability to drive safely.
• Never stop abruptly — If you and your doctor decide to discontinue Clorazepate, you'll need to taper the dose gradually to avoid withdrawal symptoms or rebound seizures.
• Keep follow-up appointments — Regular check-ins let your doctor monitor for side effects and adjust your treatment as needed.

Final Thoughts

Most Clorazepate side effects are manageable, especially during the first few weeks as your body adjusts. Drowsiness, dizziness, and dry mouth are the most common and often improve with time or dose adjustments.

The serious risks—respiratory depression with opioids, dependence, and withdrawal seizures—are real but preventable with proper medical supervision. If you experience any concerning symptoms, don't wait to contact your doctor.

Looking for Clorazepate at the best price? Check out our guide on how to save money on Clorazepate, or use Medfinder to locate a pharmacy near you that has it in stock.