Benzodiazepine
Lorazepam drug interactions: a practical overview
Drug interactions are the single biggest cause of preventable medication problems. Lorazepam (Lorazepam) interacts to varying degrees with several classes of medication and with a smaller list of foods. This page summarises the practically important ones at 0.5mg, 1mg, 2mg, framed for a real-world prescription review rather than an exhaustive PDF list.
High-priority interactions for Lorazepam
For Lorazepam, the most clinically relevant interactions are typically with strong CYP3A4 inhibitors and inducers, with cardiovascular medications (notably nitrates for several Benzodiazepine agents), with central nervous system depressants, and with medications affecting blood pressure or heart rate. Lorazepam binds the benzodiazepine site of the GABA-A receptor and allosterically enhances the action of the inhibitory neurotransmitter GABA.
Working with the pharmacist
A pharmacist review of all current medications is the practical safeguard against unintended interactions with Lorazepam. According to the prescribing information for Lorazepam, the full medication list — prescription, OTC, supplements and recreational substances — should be reviewed before starting and at every dose change at 0.5mg, 1mg, 2mg.
Frequently asked questions
What's the most important Lorazepam interaction to know? ▾
For most Benzodiazepine medications, the highest-priority interaction is with nitrate medications used for chest pain — this combination is often a hard contraindication. After that, strong CYP3A4 inhibitors (some antifungals, macrolides) are the next concern at routine 0.5mg, 1mg, 2mg doses.
Do I need to tell the pharmacist about supplements? ▾
Yes. Supplements and herbal products can interact with Lorazepam in ways that prescription drug-drug interaction databases miss. The pharmacist needs the complete picture — including supplements like St John's Wort, grapefruit-containing products and high-dose vitamins — to flag risks at 0.5mg, 1mg, 2mg.
Products containing Lorazepam
More on Lorazepam
- With alcoholLorazepam and alcohol — is it safe to drink?
- With foodShould Lorazepam be taken with food?
- Side effectsLorazepam side effects: common, rare and warning signs
- Dosage guideLorazepam dosage guide: how much to take and when
- OnsetHow fast does Lorazepam start working?
- DurationHow long does Lorazepam last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.