Understanding Diphenhydramine: Uses, Side Effects, and Interactions

Diphenhydramine is an antihistamine medication that is commonly found in over-the-counter (OTC) sleep aids and allergy medications. It works by blocking the action of histamine, a chemical messenger in the body that is responsible for many of the symptoms associated with allergies and colds.

One of the most well-known brand names for diphenhydramine is Benadryl, although it is also available under other brand names and as a generic medication. Diphenhydramine is often used to treat symptoms such as sneezing, runny nose, itchy eyes, and hives. It can also be used to relieve motion sickness and to help people fall asleep.

However, it's important to note that diphenhydramine can cause drowsiness and impair cognitive function, and it should only be taken as directed by a healthcare professional or according to the instructions on the packaging. Taking more than the recommended dose can increase the risk of side effects, including dizziness, confusion, and difficulty urinating.

It's also worth noting that diphenhydramine can interact with other medications, such as antidepressants, sedatives, and certain antibiotics, so it's important to inform your healthcare provider of any medications you are currently taking before using diphenhydramine. Additionally, diphenhydramine should not be used in children under the age of two without the guidance of a healthcare professional, as it can cause serious side effects in young children.