Drug interactions
Diamorphine + Methamphetamine
Severity: Moderate
Diamorphine and Methamphetamine: moderate 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
Diamorphine (heroin) is an opioid causing sedation and respiratory depression, and methamphetamine is a stimulant. Stimulant effects may hide opioid intoxication, and the combination also strains the cardiovascular system. Overdose risk is notable.
What this interaction means in plain words
Diamorphine and Methamphetamine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Opposing CNS effects with additive cardiovascular strain; the stimulant masks opioid sedation without reversing respiratory depression.
What to do
Monitor respiratory rate, sedation level and cardiovascular status. Counsel on overdose risk and ensure access to naloxone.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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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 Diamorphine with Methamphetamine?
MediHelp rates the interaction as moderate. Diamorphine and Methamphetamine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Diamorphine (heroin) is an opioid causing sedation and respiratory depression, and methamphetamine is a stimulant. Stimulant effects may hide opioid intoxication, and the combination also strains the cardiovascular system. Overdose risk is notable.
How serious is the interaction between Diamorphine and Methamphetamine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor respiratory rate, sedation level and cardiovascular status. Counsel on overdose risk and ensure access to naloxone.
What other medicines interact with Methamphetamine?
MediHelp also lists interactions of Methamphetamine with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Methamphetamine page.
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