Diphenhydramine is a prescription medicine. Primarily, it is used for the treatment of Allergy, Motion Sickness, Allergic Rhinitis. Other than this, Diphenhydramine has some other therapeutic uses, which have been discussed ahead.

The optimal dosage of Diphenhydramine is largely dependent on the individual's body weight, medical history, gender and age. Dosage also depends on the route of administration and your chief complaint for which the drug is prescribed. Detailed information has been provided in the dosage section.

Diphenhydramine also has some side effects, the most common being Unsteadiness. Some other side effects of Diphenhydramine have been listed ahead. Normally, these side effects of Diphenhydramine are not long lasting and go away when the treatment is finished. Consult your doctor if these side effects become worse or stay for a longer duration.

In addition, Diphenhydramine's effect is Moderate during pregnancy and Severe for lactating mothers. It is important to know if Diphenhydramine has any effect on the kidney, liver and heart. Information on such adverse effects, if any, has been given in the Diphenhydramine related warnings section.

Diphenhydramine is contraindicated in people with pre-existing medical conditions like Peptic Ulcer, Depression as it can result in adverse effects. The section on Diphenhydramine contraindications lists all such conditions.

Additionally, Diphenhydramine may also adversely react with other medicines. A complete list of these interactions is given below.

In addition to the above precautions for Diphenhydramine, it is important to know that it is not safe while driving, and is not habit-forming.