Drug interactions
Morphine + Same
Severity: Minor
Morphine and Same: 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
S-adenosylmethionine (SAMe) has serotonergic activity, and combining it with opioids that have some serotonergic effect could theoretically contribute to serotonin toxicity. Morphine has only weak serotonergic activity, so the risk is low.
What this interaction means in plain words
Morphine and Same have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Theoretical additive serotonergic effects; not well established.
What to do
No routine change is needed; counsel patients to report agitation, tremor, sweating or fever.
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 Morphine
- Alvimopan + Morphine Contraindicated
- Isocarboxazid + Morphine Contraindicated
- Morphine + Olanzapine / samidorphan Contraindicated
- Morphine + Phenelzine Contraindicated
- Morphine + Tranylcypromine Contraindicated
- Alfentanil + Morphine Major
Frequently asked questions
Can I take Morphine with Same?
MediHelp rates the interaction as minor. Morphine and Same have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. S-adenosylmethionine (SAMe) has serotonergic activity, and combining it with opioids that have some serotonergic effect could theoretically contribute to serotonin toxicity. Morphine has only weak serotonergic activity, so the risk is low.
How serious is the interaction between Morphine and Same?
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 routine change is needed; counsel patients to report agitation, tremor, sweating or fever.
What other medicines interact with Morphine?
MediHelp also lists interactions of Morphine with, for example, Alvimopan, Isocarboxazid, Olanzapine / samidorphan. The full list is on the Morphine page.
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