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5-HTP Side Effects

Generic Name: 5-hydroxytryptophan

Note: This document contains side effect information about 5-hydroxytryptophan. Some of the dosage forms listed on this page may not apply to the brand name 5-HTP.

Applies to 5-hydroxytryptophan: oral capsule

Get emergency medical help if you have any of these signs of an allergic reaction while taking 5-hydroxytryptophan (the active ingredient contained in 5-HTP) hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Although not all side effects are known, 5-hydroxytryptophan is thought to be possibly safe when taken for a short period of time.

Stop using 5-hydroxytryptophan and call your doctor at once if you have:

  • severe tingling or numbness;

  • skin rash, bruising, fever; or

  • muscle pain or weakness.

Common side effects may include:

  • drowsiness;

  • nausea, vomiting, stomach pain, heartburn;

  • diarrhea; or

  • loss of interest in sex.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.

More about 5-HTP (5-hydroxytryptophan)

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