5-HTP and SAMe: Can You Take Them Together?

Use caution — significant interaction

5-HTP and SAMe can interact. Additive serotonergic load, and with it a risk of serotonin syndrome: agitation, shivering, tremor, twitching muscles, sweating, a fast heartbeat and, at the severe end, fever and rigidity. This specific pair has not been studied; the risk is inferred from what each does alone and from how the same table already grades each against prescription serotonergics. Do not stack them. If both are being considered for mood, pick one and give it a fair trial. Seek urgent medical help for agitation, shivering, twitching, a racing heart, sweating or fever. Anyone already on an antidepressant should not be taking either without their prescriber.

What the evidence says

majorconflict· limited evidence

5-HTP is the immediate precursor of serotonin and raises its synthesis directly. SAMe raises monoamine turnover and acts at 5-HT1A receptors — the mechanism behind its antidepressant effect. Both push the same system.

What to do: Do not stack them. If both are being considered for mood, pick one and give it a fair trial. Seek urgent medical help for agitation, shivering, twitching, a racing heart, sweating or fever. Anyone already on an antidepressant should not be taking either without their prescriber.

5-HTP

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SAMe

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Related interactions

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Frequently asked questions

Can you take 5-HTP and SAMe together?: 5-HTP and SAMe can interact. Additive serotonergic load, and with it a risk of serotonin syndrome: agitation, shivering, tremor, twitching muscles, sweating, a fast heartbeat and, at the severe end, fever and rigidity. This specific pair has not been studied; the risk is inferred from what each does alone and from how the same table already grades each against prescription serotonergics. Do not stack them. If both are being considered for mood, pick one and give it a fair trial. Seek urgent medical help for agitation, shivering, twitching, a racing heart, sweating or fever. Anyone already on an antidepressant should not be taking either without their prescriber.
Do 5-HTP and SAMe interact?: Additive serotonergic load, and with it a risk of serotonin syndrome: agitation, shivering, tremor, twitching muscles, sweating, a fast heartbeat and, at the severe end, fever and rigidity. This specific pair has not been studied; the risk is inferred from what each does alone and from how the same table already grades each against prescription serotonergics. 5-HTP is the immediate precursor of serotonin and raises its synthesis directly. SAMe raises monoamine turnover and acts at 5-HT1A receptors — the mechanism behind its antidepressant effect. Both push the same system.
Should you separate 5-HTP and SAMe?: Do not stack them. If both are being considered for mood, pick one and give it a fair trial. Seek urgent medical help for agitation, shivering, twitching, a racing heart, sweating or fever. Anyone already on an antidepressant should not be taking either without their prescriber.

This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.

What the evidence says

majorconflict· limited evidence

Frequently asked questions

Can you take 5-HTP and SAMe together?

Do 5-HTP and SAMe interact?

Additive serotonergic load, and with it a risk of serotonin syndrome: agitation, shivering, tremor, twitching muscles, sweating, a fast heartbeat and, at the severe end, fever and rigidity. This specific pair has not been studied; the risk is inferred from what each does alone and from how the same table already grades each against prescription serotonergics. 5-HTP is the immediate precursor of serotonin and raises its synthesis directly. SAMe raises monoamine turnover and acts at 5-HT1A receptors — the mechanism behind its antidepressant effect. Both push the same system.

Should you separate 5-HTP and SAMe?

Do not stack them. If both are being considered for mood, pick one and give it a fair trial. Seek urgent medical help for agitation, shivering, twitching, a racing heart, sweating or fever. Anyone already on an antidepressant should not be taking either without their prescriber.