Drug interactions
Diazepam + Methamphetamine
Severity: Minor
Diazepam and Methamphetamine: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Methamphetamine is a stimulant and diazepam a sedative, so their effects may partly oppose one another. Stimulant effects can mask sedation without removing diazepam's impairment of judgment and coordination, and cardiovascular stimulation continues. No consistent pharmacokinetic interaction is established.
What this interaction means in plain words
Diazepam and Methamphetamine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Diazepam belongs to Musculoskeletal; Methamphetamine belongs to Central Nervous System.
Why it happens
Opposing pharmacodynamic effects on CNS arousal; no established pharmacokinetic mechanism.
What to do
No dose adjustment is needed. Counsel patients not to judge their fitness to drive by perceived alertness.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Diazepam
Other interactions of Methamphetamine
- Isocarboxazid + Methamphetamine Contraindicated
- Linezolid + Methamphetamine Contraindicated
- Methamphetamine + Phenelzine Contraindicated
- Methamphetamine + Procarbazine Contraindicated
- Methamphetamine + Rasagiline Contraindicated
- Methamphetamine + Safinamide Contraindicated
Frequently asked questions
Can I take Diazepam with Methamphetamine?
MediHelp rates the interaction as minor. Diazepam and Methamphetamine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Methamphetamine is a stimulant and diazepam a sedative, so their effects may partly oppose one another. Stimulant effects can mask sedation without removing diazepam's impairment of judgment and coordination, and cardiovascular stimulation continues. No consistent pharmacokinetic interaction is established.
How serious is the interaction between Diazepam and Methamphetamine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No dose adjustment is needed. Counsel patients not to judge their fitness to drive by perceived alertness.
What other medicines interact with Diazepam?
MediHelp also lists interactions of Diazepam with, for example, Calcium / magnesium / potassium / sodium oxybates, Alfentanil, Alprazolam. The full list is on the Diazepam page.
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