What Is Oxazepam? Uses, Dosage, and What You Need to Know in 2026

Oxazepam is a prescription medication in the benzodiazepine class. If you've been prescribed it or are considering it, this guide covers everything you need to know: what it treats, what it looks like, how to take it safely, and what to watch out for.

What Is Oxazepam?

Oxazepam is a short-to-intermediate acting benzodiazepine — a class of drugs that work on the central nervous system to produce calming, anti-anxiety, and sedative effects. It was approved by the FDA in 1964 and was marketed for decades under the brand name Serax. The brand name has since been discontinued; only generic Oxazepam is currently available in the United States.

Oxazepam belongs to a subgroup of benzodiazepines that are metabolized without using the liver's CYP450 enzyme system. This makes it especially valuable for elderly patients and those with liver disease, who might otherwise accumulate dangerous levels of other benzodiazepines.

What Is Oxazepam Used For?

The FDA has approved Oxazepam for:

• Anxiety disorders: Including generalized anxiety disorder and situational anxiety
• Anxiety associated with depression: Short-term use to manage anxiety symptoms in patients with major depressive disorder
• Alcohol withdrawal syndrome: Management of acute symptoms including tremors, agitation, and prevention of seizures

Off-label, Oxazepam is sometimes used for insomnia (specifically for difficulty staying asleep, not difficulty falling asleep) and tension/agitation in elderly patients.

What Does Oxazepam Look Like?

Generic Oxazepam is available in two forms:

• Capsules: Available in 10 mg, 15 mg, and 30 mg strengths
• Tablets: Available in 15 mg

There is no liquid or injectable form of Oxazepam approved in the US.

What Is the Usual Dose of Oxazepam?

Doses vary by condition and individual patient factors. General dosing ranges are:

• Anxiety: 10–30 mg taken 3 or 4 times daily
• Alcohol withdrawal: 15–30 mg taken 3 or 4 times daily
• Elderly patients: Often initiated at 10 mg three times daily, with cautious titration

Oxazepam takes approximately 30-60 minutes to begin working, with peak effects around 2-3 hours. Its half-life is roughly 8-12 hours, meaning you'll typically take it multiple times a day to maintain consistent blood levels.

How Should I Take Oxazepam?

• Take exactly as prescribed — do not take more or more often than directed
• Can be taken with or without food
• Do not drink alcohol while taking Oxazepam — the combination can cause dangerous respiratory depression
• Avoid driving or operating machinery until you know how Oxazepam affects your alertness
• Store in a secure location — as a Schedule IV controlled substance, it should be kept away from others who might misuse it
• Never stop Oxazepam suddenly — always taper under your doctor's guidance to avoid withdrawal.

How Long Is Oxazepam Prescribed For?

Oxazepam is intended for short-term use. Clinical studies have not established its effectiveness for long-term use beyond 4 months. Your prescriber will reassess whether you still need it at follow-up appointments. Long-term benzodiazepine use carries increased risks of dependence, cognitive effects, and tolerance.

Is Oxazepam Addictive?

Like all benzodiazepines, Oxazepam carries a risk of physical dependence, tolerance, and misuse. This is why it's classified as a Schedule IV controlled substance. When taken as prescribed for the shortest necessary period, risks are minimized. However, your body can become physically dependent even with therapeutic use, which is why it should never be stopped abruptly.

To understand exactly how Oxazepam produces its effects, read our article How Does Oxazepam Work?. And if your pharmacy is out of stock, medfinder.com can help you find it near you.