Generic Benadryl, Diphenhydramine hydrochloride

Diphenhydramine is used in the treatment of allergic disorders and the symptoms it causes.

Benadrylworks by blocking histamine receptors and increasing the breakdown of Diphenhydramine works by selectively inhibiting the H1 histamine receptors therefore preventing histamine from acting on its receptors Diphenhydramine helps to alleviate the symptoms caused by hay fever or other allergies (such as a runny nose and watery eyes).

Patients who take Diphenhydramine may suffer from such side effects;

Nausea,
Nervousness,
Fatigue,
Headache,
Hypersensitivity reaction,
Inability to empty the urinary bladder,
Increased energy,
Muscle twitching,
Palpitations,
Blurred vision,
Confusion,
Convulsion,
Difficulty in paying attention,
Dizziness,
Drowsiness,
Dry mouth,
Shortness of breath,
Difficulty in urination,
Eye swelling,
Lip swelling,
Restlessness,
Ringing in ear,
Sedation,
Tachycardia,
Thickened respiratory tract secretions,
Unsteadiness,
Vomiting