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heartburn, stomach pain, belching and gas, nausea, vomiting, diarrhea, and loss of appetite. It can also cause headache, lightheadedness, drowsiness, dry mouth, visual blurring, muscle weakness, and sexual problems.
There are concerns that L-tryptophan or impurities in L-tryptophan might cause swelling (inflammation) of the joints, skin, lungs, heart, and liver and other side effects, including death.
Do not take L-tryptophan if:
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.