What to Expect When Starting Lorazepam
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Introduction
Lorazepam (Ativan) is a benzodiazepine used to treat anxiety disorders, status epilepticus, and as a pre-procedural sedative. It works by enhancing GABA activity in the brain, producing calming and anticonvulsant effects within 15-30 minutes of an oral dose. Because of its potential for physical dependence, lorazepam is typically prescribed for short-term use or on an as-needed basis.
Week-by-week timeline
Initial Effects
Effects begin within 15-30 minutes of an oral dose and last 6-8 hours. Expect significant sedation, anxiety relief, and muscle relaxation. Coordination and memory may be impaired. Avoid driving or operating machinery.
Adjusting to Therapy
If prescribed regularly, sedation may become less pronounced as tolerance develops. Anxiety relief remains consistent. Avoid alcohol completely during treatment.
Assessing Effectiveness
Your doctor evaluates symptom control. If used for anxiety disorder, a transition to longer-term therapies such as SSRIs or therapy is often planned. Short-term use is preferred to minimize dependence risk.
Tapering Plan if Discontinuing
If lorazepam was prescribed short-term, your doctor will create a gradual tapering plan to avoid withdrawal. Never stop abruptly as this can trigger seizures and severe rebound anxiety.
When to call your doctor
Contact your healthcare provider if you experience:
- Difficulty breathing or inability to wake up (call 911 immediately)
- Severe allergic reaction: hives, facial swelling, difficulty breathing
- New or worsening depression or suicidal thoughts
- Signs of dependence: needing higher doses, inability to function without the medication
- Severe confusion, extreme memory loss, or unusual behavior changes
- Falls or injuries due to sedation or impaired coordination
Tips for getting started
Take lorazepam exactly as prescribed — never exceed the dose or frequency. Do not drink alcohol (dangerous respiratory depression risk). Avoid driving or heavy machinery, especially when starting. Tell all providers about lorazepam use, especially if opioids are prescribed. Never share this medication. If prescribed as needed, take only when anxiety is unmanageable.
Frequently asked questions
More about Lorazepam
References
- [Regulatory] FDA Prescribing Information for Ativan (lorazepam) https://www.accessdata.fda.gov/drugsatfda_docs/label/2016/017794s044lbl.pdf Accessed 2026-03-01.
- [Regulatory] NIH MedlinePlus: Lorazepam https://medlineplus.gov/druginfo/meds/a682053.html Accessed 2026-03-01.
- [Clinical] DEA Benzodiazepines Drug Fact Sheet https://www.dea.gov/factsheets/benzodiazepines Accessed 2026-03-01.
Written and fact-checked by PrescriptionDrugs.org Editorial Team
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