Diphenhydramin is used to treat sneezing, runny nose, itching, watery eyes, hives, rashes, itching and other symptoms of allergies and common cold. It i... View More
Uses of Diphenhydramin
Side effects of Diphenhydramin
How to use Diphenhydramin
Take this medicine in the dose and duration as advised by your doctor. Check the label for directions before use. Measure it with a measuring cup and ta... View More
How Diphenhydramin works
Diphenhydramin is an antihistaminic medication. It blocks the action of certain chemical messengers that are responsible for inflammation, congestion, i... View More
What if you forget to take Diphenhydramin?
If you miss a dose of Diphenhydramin, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to... View More
Allergic rhinitis, Allergic conditions, Motion sickness, Common cold, Insomnia, Extrapyramidal symptoms
May be taken with or without food.
Oral Allergic conditions; Treatment and prophylaxis of motion sickness Adult: 25-50 mg 3-4 times daily. For prevention of motion sickness, admin 30 mi... View More
Allergic Reaction 2-6 years: 6.25 mg q4-6hr; not to exceed 37.5 mg/day 6-12 years: 12.5-25 mg PO q4-6hr; not to exceed 150 mg/day >12 years: 25-50 mg... View More
Renal impairment: No dosage adjustment needed.
Hypersensitivity ; neonates, lactation.
Mode of Action
Diphenhydramine blocks histamine H1-receptors on effector cells of the GI tract, blood vessels and respiratory tract. It also causes sedation and has so... View More
Epilepsy; elderly; performing tasks which require mental alertness; angle-closure glaucoma; pyroduodenal obstruction; urinary tract obstruction; hyperth... View More
Chest tightness, extrasystoles, hypotension, palpitations, tachycardia; ataxia, chills, confusion, dizziness, drowsiness, euphoria, excitement, fatigue,... View More
Pregnancy Category Note
Pregnancy category: B Lactation: Drug enters breast milk; contraindicated
Masks ototoxicity produced by aminoglycosides. Increases gastric degradation of levodopa and decreases its absorption by reduction of gastric emptying. ... View More