Learn about the potential side effects of Simply Sleep (diphenhydramine). Includes common and rare side effects information for consumers and healthcare professionals. Benadryl doesn’t affect your liver like alcohol does. But both drugs work on your central nervous system (CNS), which is made up of your brain and spinal cord. For people who take an antihistamine such as Benadryl for a cold or allergies, drowsiness is often a welcome side effect. But a Baylor College of Medicine sleep expert cautions against turning to this type of medication as a sleep aid. Many dogs are given Benadryl to help them fend off allergic reactions. But can you give a cat Benadryl? Veterinarians weigh in on whether Benadryl is safe for cats. New Benadryl Coupon For Canada Save $4.00 off any one Benadryl product This coupon is available in Print format only. Print coupon for Benadryl Here Coupon is currently not available This Benadryl coupon expiry date is unknown. Available for Simply Sleep® is the sleep aid that is non-habit forming, when used as directed, with nothing more than what helps you sleep when pain isn’t keeping you up. Medscape - Hypersensitivity reactions, insomnia, antihistamine-specific dosing for Benadryl, Nytol (diphenhydramine), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and cost information. Easy-to-read patient leaflet for Simply Sleep. Includes indications, proper use, special instructions, precautions, and possible side effects. on any ONE (1) BENADRYL ® Topical product (excludes trial and travel sizes) Giving Benadryl to your dog: should you do it? Is it helpful and harmless? Or is Benadryl for dogs dangerous and a bad idea? Used properly, in the right situations, Benadryl can be a lifesaver—preventing headaches and alleviating discomfort for your dog.