Benadryl is an over-the-counter medication primarily used to relieve symptoms of allergies, hay fever, and the common cold. Its active ingredient, diphenhydramine, is an antihistamine that helps reduce sneezing, runny nose, and itching. It can also be used to alleviate symptoms of motion sickness and induce sleep. In addition to its allergy-relief properties, Benadryl may cause drowsiness, making it a common choice for those seeking help with sleep issues. However, it is important to use it as directed and consult a healthcare professional if you have any concerns or pre-existing conditions.