Diphenhydramine vs Irbesartan

## Diphenhydramine vs Irbesartan: Overview

This comparison examines the pharmacological differences between **Diphenhydramine** and **Irbesartan**.

## Mechanism of Action

**Diphenhydramine**: First-generation H1 antihistamine with anticholinergic properties.

**Irbesartan**: Selective non-competitive angiotensin II type 1 receptor antagonist.

## Pharmacokinetics

**Half-life**: Diphenhydramine — 2-8 hours; Irbesartan — 11-15 hours.

## Chemical Properties

**Molecular Formula**: Diphenhydramine — C17H21NO; Irbesartan — C25H28N6O.

**Molecular Weight**: Diphenhydramine — 255.3550 g/mol; Irbesartan — 428.5320 g/mol.

**Type**: Diphenhydramine — Small molecule; Irbesartan — Small molecule.