Drug interactions
Dextromethorphan + Same
Severity: Moderate
Dextromethorphan and Same: 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
SAMe may increase serotonergic activity, and with dextromethorphan could raise the risk of serotonin syndrome. Evidence is limited to theoretical concern and isolated reports with other serotonergic drugs.
What this interaction means in plain words
Dextromethorphan and Same 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
Possible additive serotonergic effect; the mechanism is not firmly established.
What to do
Monitor for signs of serotonin toxicity and avoid high doses of both.
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 Dextromethorphan
- Dextromethorphan + Isocarboxazid Contraindicated
- Dextromethorphan + Linezolid Contraindicated
- Dextromethorphan + Phenelzine Contraindicated
- Dextromethorphan + Rasagiline Contraindicated
- Dextromethorphan + Safinamide Contraindicated
- Dextromethorphan + Selegiline Contraindicated
Frequently asked questions
Can I take Dextromethorphan with Same?
MediHelp rates the interaction as moderate. Dextromethorphan and Same 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. SAMe may increase serotonergic activity, and with dextromethorphan could raise the risk of serotonin syndrome. Evidence is limited to theoretical concern and isolated reports with other serotonergic drugs.
How serious is the interaction between Dextromethorphan and Same?
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 for signs of serotonin toxicity and avoid high doses of both.
What other medicines interact with Dextromethorphan?
MediHelp also lists interactions of Dextromethorphan with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Dextromethorphan page.
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