Tranxene Side Effects: What to Expect and When to Call Your Doctor

Tranxene (clorazepate dipotassium) is an effective medication for anxiety, seizures, and alcohol withdrawal — but like all benzodiazepines, it comes with a meaningful side effect profile that patients need to understand. This guide covers what to expect, what the FDA boxed warnings mean in practical terms, and when a side effect warrants a call to your doctor.

FDA Boxed Warnings: What You Must Know First

In September 2020, the FDA updated the boxed warning — the most serious type of warning the FDA can require — for all benzodiazepines, including clorazepate. There are three core warnings:

Abuse, misuse, and addiction: Misusing clorazepate can lead to addiction, overdose, and death. Keep it in a secure place and take it exactly as prescribed.

Physical dependence and withdrawal: Regular use creates physical dependence. Stopping Tranxene suddenly after long-term use can cause life-threatening withdrawal symptoms including seizures, hallucinations, and severe anxiety. Never stop without your doctor's guidance.

Opioid interaction: Combining clorazepate with opioid pain medications can cause profound sedation, respiratory depression, coma, and death. Inform every healthcare provider you see that you take Tranxene.

Common Side Effects of Tranxene

The most commonly reported side effect of Tranxene is drowsiness. According to the prescribing information, drowsiness is the most frequently reported side effect, and it's most likely to occur when you first start taking clorazepate or when your dose is increased. Other common side effects include:

Dizziness and lightheadedness

Gastrointestinal complaints (nausea, upset stomach)

Nervousness or irritability

Blurred vision

Dry mouth

Headache

Mental confusion, memory difficulties

Ataxia (unsteady gait) — more common in elderly patients

Fatigue and weakness

Insomnia (usually on initial treatment)

Transient skin rashes

Diplopia (double vision)

Tremor and slurred speech (less common)

Many of these side effects are most prominent when you start clorazepate or increase your dose, and they often improve as your body adjusts. If side effects persist or interfere significantly with daily functioning, contact your prescriber.

Serious Side Effects: When to Seek Immediate Care

Call 911 or go to the nearest emergency room immediately if you experience:

Difficulty breathing or shortness of breath (respiratory depression)

Extreme sedation or inability to be awakened

Signs of severe allergic reaction: hives, facial swelling, throat tightening, difficulty swallowing

Seizures (particularly if stopping the medication abruptly)

Hallucinations (seeing, hearing, or feeling things that aren't there)

Thoughts of suicide or self-harm — call 988 (Suicide & Crisis Lifeline) or 911 immediately

Paradoxical Reactions

A small number of patients — particularly children, the elderly, or those with a history of aggressive behavior — experience what are called paradoxical reactions to benzodiazepines. Instead of calming effects, they experience increased anxiety, agitation, irritability, hallucinations, or even worsening of seizures. If you notice these effects, contact your prescriber promptly rather than continuing or increasing the medication.

Special Considerations for Elderly Patients

Elderly patients are more sensitive to all benzodiazepine effects, including clorazepate. The Beers Criteria — a clinical guideline for potentially inappropriate medications in older adults — flags all benzodiazepines as medications to be used with caution in patients 65 and older due to the risk of falls, fractures, excessive sedation, and cognitive impairment. Older patients on clorazepate should be on the lowest effective dose and monitored regularly.

Side Effects vs. Withdrawal Symptoms

It's important to distinguish between side effects that occur during active use and withdrawal symptoms that occur when stopping or reducing the dose. Withdrawal symptoms from clorazepate can include anxiety, tremors, sweating, nausea, insomnia, and in severe cases, seizures and psychosis. Always taper gradually under medical supervision rather than stopping abruptly. For information on drug interactions that can worsen side effects, see our guide on Tranxene drug interactions.