Supplement-Induced Tremors

Introduction to Risks

The risk of tremors increases significantly when tryptophan is combined with other serotonergic medications, potentially leading to serotonin syndrome, which can progress to seizures, respiratory failure, and death, according to the American College of Medical Toxicology 1
Symptoms of serotonin syndrome include mental status changes, neuromuscular hyperactivity (including tremors), and autonomic hyperactivity, and typically develop rapidly, within 24-48 hours after starting or increasing the dose of a serotonergic agent 1

The Society for Perioperative Assessment and Quality Improvement (SPAQI) recommends holding L-tryptophan supplements for 24 hours before surgery due to potential serotonergic effects, and also advises against L-tryptophan use with other drugs that inhibit serotonin reuptake to minimize the risk of serotonin syndrome 3
Starting with low doses and titrating slowly is recommended to minimize the risk of adverse effects, including tremors, by the American Academy of Clinical Toxicology 2

Discontinuation of the supplement is the first step in managing any supplement-induced tremor, and if tremors occur while taking these supplements, especially if accompanied by other symptoms like agitation, confusion, or increased heart rate, immediate medical attention should be sought, as advised by the American College of Emergency Physicians 2
Monitor for early signs of adverse effects, particularly when starting supplementation or increasing dosage, to prevent serotonin syndrome, which is a potentially life-threatening condition 2

Those taking antidepressants (particularly SSRIs, SNRIs, or MAOIs) should avoid tryptophan supplementation due to increased risk of serotonin syndrome, as recommended by the National Institute of Mental Health 2, 1
People with a history of serotonin syndrome should avoid tryptophan supplements entirely to prevent recurrence of this potentially life-threatening condition, according to the American College of Medical Toxicology 2