Benadryl Allergy

A histamine H1 antagonist used as an antiemetic, antitussive, for dermatoses and pruritus, for hypersensitivity reactions, as a hypnotic, an antiparkinson, and as an ingredient in common cold preparations. It has some undesired antimuscarinic and sedative effects.

Medicinal name:
  • Diphenhydramine Hydrochloride 25 MG Oral Tablet [Benadryl]
  • Diphenhydramine Hydrochloride 25 MG Oral Capsule [Benadryl]

Benadryl Allergy - Pharmacology:

Benadryl Allergy competes with free histamine for binding at HA-receptor sites. This antagonizes the effects of histamine on HA-receptors, leading to a reduction of the negative symptoms brought on by histamine HA-receptor binding.

Benadryl Allergy for patients

Patients taking diphenhydramine hydrochloride should be advised that this drug may cause drowsiness and has an additive effect with alcohol.

Patients should be warned about engaging in activities requiring mental alertness such as driving a car or operating appliances, machinery, etc.

Benadryl Allergy Interactions

Benadryl Allergy hydrochloride has additive effects with alcohol and other CNS depressants (hypnotics, sedatives, tranquilizers, etc).

MAO inhibitors prolong and intensify the anticholinergic (drying) effects of antihistamines.

Benadryl Allergy Contraindications

Use in Newborn or Premature Infants: This drug should not be used in newborn or premature infants.

Use in Nursing Mothers: Because of the higher risk of antihistamines for infants generally, and for newborns and prematures in particular, antihistamine therapy is contraindicated in nursing mothers.

Antihistamines are also contraindicated in the following conditions: Hypersensitivity to diphenhydramine hydrochloride and other antihistamines of similar chemical structure.


Use as a Local Anesthetic: Because of the risk of local necrosis, this drug in the parenteral from should not be used as a local anesthetic.

Manufacturers name:

  • Lil Drug Store Products, Inc
  • Rebel Distributors Corp
  • McNeil Consumer Healthcare Div McNeil-PPC, Inc

Benadryl Allergy tags categories:

Generic name, Overdose, Half Life Benadryl Allergy, Food Interactions, Chemical, etc..

Benadryl Allergy see also

Chemical structure:
N O H H H H H H H H H H H H H H H H H H H H H C17H21NO 2D chemical structure C17H21NO SVG | 2D structure Atomoxetine | Diphenhydramine | chemical names, chemical properties, classification C17H21NO