Tryptophan Side Effects

Medically reviewed by Drugs.com. Last updated on Jun 27, 2024.

Applies to tryptophan: oral capsule, oral tablet.

It is important that your doctor check your progress at regular visits, to allow dosage adjustments and help reduce any side effects.

This medicine may cause some people to become drowsy, dizzy, or less alert than they are normally. Make sure you know how you react to this medicine before you drive, use machines, or do anything else that could be dangerous if you are dizzy or are not alert.

This medicine may cause dryness of the mouth. Using sugarless candy or gum, ice, or a saliva substitute may be helpful. Check with your physician or dentist if dry mouth continues for more than 2 weeks.

Avoid excessive exposure to ultraviolet light to reduce the chance of cataract formation.

Serious side effects of tryptophan

Along with its needed effects, tryptophan may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Symptoms of overdose

Get emergency help immediately if any of the following symptoms of overdose occur while taking tryptophan:

• Agitation
• confusion
• diarrhea
• fever
• overactive reflexes
• poor coordination
• restlessness
• shivering
• sweating
• talking or acting with excitement you cannot control
• trembling or shaking
• twitching
• vomiting

Other side effects of tryptophan

Some side effects of tryptophan may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

• Dizziness
• drowsiness
• dry mouth
• headache
• loss of appetite
• nausea

See also:

Further information

Tryptophan side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer