Diphenhydramine vs Montelukast

## Diphenhydramine vs Montelukast: Overview

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

## Mechanism of Action

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

**Montelukast**: Selective leukotriene D4 receptor antagonist.

## Pharmacokinetics

**Half-life**: Diphenhydramine — 2-8 hours; Montelukast — 2.7-5.5 hours.

## Chemical Properties

**Molecular Formula**: Diphenhydramine — C17H21NO; Montelukast — C35H36ClNO3S.

**Molecular Weight**: Diphenhydramine — 255.3550 g/mol; Montelukast — 586.1800 g/mol.

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