FAQs
Frequently Asked Questions
Medicinal Ingredients FAQs
What exactly is diphenhydramine HCL?
Diphenhydramine HCL is a common antihistamine. Originally used to treat symptoms of allergies, such as mild rashes, itching, watery eyes, running nose and sneezing, it was soon discovered that Diphenhydramine HCL could help people fall and stay asleep. We’ve formulated our ZzzQuil products around this ingredient to give you the best sleep possible.
Can I use allergy medications in place of ZzzQuil to help fall asleep?
Our Vicks ZzzQuil products have been carefully crafted to give you the best sleep possible. Unlike the Diphenhydramine HCL used to decrease symptoms of allergies, the only purpose of our Diphenhydramine HCL formula is for better sleep. Just like we don’t recommend using ZzzQuil to treat symptoms of allergies, we recommend that you do not use allergy medications for anything other than treating allergies, as it increases the risk of side effects and decreases the chance of successful results.
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