Diphenhydramine vs Ranitidine

Diphenhydramine vs Ranitidine: Overview

This comparison examines the pharmacological differences between Diphenhydramine and Ranitidine.

Mechanism of Action

Diphenhydramine: First-generation H1 antihistamine with anticholinergic properties.

Ranitidine: Competitive H2 receptor antagonist.

Pharmacokinetics

Half-life: Diphenhydramine — 2-8 hours; Ranitidine — 2-3 hours.

Chemical Properties

Molecular Formula: Diphenhydramine — C17H21NO; Ranitidine — C13H22N4O3S.

Molecular Weight: Diphenhydramine — 255.3550 g/mol; Ranitidine — 314.4050 g/mol.

Type: Diphenhydramine — Small molecule; Ranitidine — Small molecule.