TUMS+ Heartburn + Sleep Support Chewable Tablets o¿er fast relief of occasional heartburn. Includes 5 mg of Melatonin for sleep support. 600 mg of elemental calcium per serving (2 chews) is equivalent to 1500 calcium carbonate. Sleep support: Includes 5mg of Melatonin to provide relief from occasional sleeplessness when you have occasional heartburn. Helps you fall asleep faster: Compared to those not taking melatonin.These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.