Diphenhydramine

Diphenhydramine is a medication that helps relieve symptoms from hay fever, other allergies, and the common cold, such as sneezing, runny nose, and itchy eyes. It works by blocking certain natural substances in the body that cause these allergy symptoms. You can take it every 4 to 6 hours, but don't take more than 6 doses in a day; for children aged 6 to under 12 years, the starting dose is 1 to 2 teaspoonfuls (5 ml to 10 ml). It's important not to use it with any other product that contains diphenhydramine, as this can lead to serious side effects. Additionally, children under 4 years of age should not use this medication, and those aged 4 to under 6 should only use it if directed by a doctor.