Skip to main content

5-HTP Side Effects

Generic name: 5-hydroxytryptophan

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

Applies to 5-hydroxytryptophan: oral capsule, oral tablet, oral tablet disintegrating, oral tablet extended release.

Follow all directions on the product label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.

Get emergency medical help if you have signs of an allergic reaction: hives, difficult breathing, swelling of your face, lips, tongue, or throat.

Seek medical attention right away if you have symptoms of serotonin syndrome, such as: agitation, hallucinations, fever, sweating, shivering, fast heart rate, muscle stiffness, twitching, loss of coordination, nausea, vomiting, or diarrhea.

Stop using 5-hydroxytryptophan (the active ingredient contained in 5-HTP) and call your healthcare provider at once if you have:

Common side effects may include:

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

More about 5-HTP (5-hydroxytryptophan)

Patient resources

Professional resources

Related treatment guides

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.