Yes, temazepam is a benzodiazepine. Sold under the brand name Restoril, it is prescribed primarily for short-term treatment of insomnia. In the United States, it is classified as a Schedule IV controlled substance, placing it in the same legal category as other well-known benzodiazepines like diazepam (Valium), alprazolam (Xanax), and lorazepam (Ativan).
How Temazepam Works in the Brain
Like all benzodiazepines, temazepam enhances the activity of GABA, the brain’s main calming chemical signal. Specifically, it attaches to GABA receptors and makes them more responsive, increasing the flow of chloride ions into nerve cells. This reduces nerve cell excitability, which is why the drug produces drowsiness, muscle relaxation, and anxiety relief.
Temazepam has a particular affinity for a specific subtype of GABA receptor (the α1 subunit) that is closely linked to sleep regulation. That selectivity is part of why it’s used as a sleep aid rather than primarily for anxiety or seizures, though it does have mild anticonvulsant and anti-anxiety properties as well.
Typical Dosing and Onset
The standard adult dose is 15 mg taken at bedtime, though some people use 7.5 mg or 30 mg depending on their response. Older adults typically start at 7.5 mg because they are more susceptible to side effects like excessive drowsiness, confusion, and unsteadiness. Age-related changes in kidney and liver function can also slow the body’s ability to clear the drug.
After swallowing a capsule, temazepam reaches measurable levels in the blood within 10 to 20 minutes. Peak blood levels occur roughly 1.5 hours after dosing. Most people feel the sedative effects within 30 minutes to an hour, which is why it’s meant to be taken right at bedtime rather than earlier in the evening.
Common Side Effects
In clinical trials involving over 1,000 patients, the most frequently reported side effects were drowsiness (9.1%), headache (8.5%), fatigue (4.8%), nervousness (4.6%), lethargy (4.5%), and dizziness (4.5%). About 2.5% of people reported a “hangover” feeling the next morning, and roughly 3% experienced nausea.
Less common but still notable effects included dry mouth, confusion, blurred vision, and nightmares, each occurring in about 1 to 2% of users. In rare cases (fewer than 1 in 200 people), temazepam caused amnesia, hallucinations, or paradoxical reactions where people became more restless and agitated instead of calmer.
How It Compares to Other Benzodiazepines
Benzodiazepines differ mainly in how quickly they act, how long they last, and what they’re prescribed for. Temazepam is considered an intermediate-acting benzodiazepine, meaning it works long enough to help you stay asleep through most of the night but clears your system faster than long-acting options like diazepam. That intermediate duration is what makes it useful for insomnia specifically.
By contrast, alprazolam and lorazepam are prescribed mainly for anxiety, while clonazepam is often used for seizure disorders and panic attacks. Temazepam occupies a narrower role: it is a sleep-focused benzodiazepine. Its effects are generally milder than some other drugs in the class, with typical doses of 10 to 20 mg producing sedation comparable to 5 to 10 mg of diazepam.
Dependence and Safety Risks
All benzodiazepines carry a risk of physical dependence, and temazepam is no exception. The risk increases with higher doses and longer use, which is why it’s generally intended for short-term treatment (typically 7 to 10 days). Stopping abruptly after regular use can cause withdrawal symptoms including rebound insomnia, anxiety, and irritability. Tapering the dose gradually under medical guidance reduces this risk.
Combining temazepam with alcohol, opioids, or other sedating substances significantly increases the risk of dangerous respiratory depression. The FDA’s prescribing label also lists pregnancy as a contraindication, meaning the drug should not be used by women who are or may become pregnant. People who experience angioedema (severe swelling of the face, throat, or tongue) after taking temazepam should not take it again.
Its Controlled Substance Status
The DEA classifies temazepam as Schedule IV, meaning it has a recognized medical use but carries some potential for misuse and dependence. This is the same schedule assigned to nearly all prescription benzodiazepines. In practical terms, Schedule IV status means prescriptions may have refill limits, and pharmacies track dispensing more closely than they would for uncontrolled medications.