Captopril vs Diphenhydramine

Captopril vs Diphenhydramine: Overview

This comparison examines the pharmacological differences between Captopril and Diphenhydramine.

Mechanism of Action

Captopril: First orally active ACE inhibitor; contains thiol group that binds zinc at ACE active site.

Diphenhydramine: First-generation H1 antihistamine with anticholinergic properties.

Pharmacokinetics

Half-life: Captopril — 1.9 hours; Diphenhydramine — 2-8 hours.

Chemical Properties

Molecular Formula: Captopril — C9H15NO3S; Diphenhydramine — C17H21NO.

Molecular Weight: Captopril — 217.2850 g/mol; Diphenhydramine — 255.3550 g/mol.

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