We're very sorry you're experiencing this when taking our sleep aid. ZzzQuil Nighttime Sleep Aid contains diphenhydramine HCl, which has been used for many years. Clinical studies were conducted on diphenhydramine HCl and submitted to the FDA that show its safety and efficacy to relieve occasional sleeplessness, when used as directed. we recommend that you stop use and consult your medical provider for advice. We take your well-being very seriously, and would like to collect further details from you to further assist with this. Please give us a call Monday through Friday, 9:00am - 6:00pm EST, at 1-877-881-5813.