10 Unknown Side Effects of Melatonin By Amy J. Smith , Health Blogger & Cosmetologist - April 16, 2020 0 Side Effect 6: Mild Tremors A high dose of melatonin is also capable of inducing mild tremors. Tremors are movement disorders i.e. they cause uncontrollable shaking of the body. Prev6 of 10NextUse your ← → (arrow) keys to browse