Diphenhydramine vs Vancomycin

## Diphenhydramine vs Vancomycin: Overview

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

## Mechanism of Action

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

**Vancomycin**: Glycopeptide antibiotic inhibiting cell wall synthesis by binding D-Ala-D-Ala terminus of peptidoglycan precursors.

## Pharmacokinetics

**Half-life**: Diphenhydramine — 2-8 hours; Vancomycin — 4-6 hours.

## Chemical Properties

**Molecular Formula**: Diphenhydramine — C17H21NO; Vancomycin — C66H75Cl2N9O24.

**Molecular Weight**: Diphenhydramine — 255.3550 g/mol; Vancomycin — 1449.2500 g/mol.

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