Acyclovir vs Cetirizine

## Acyclovir vs Cetirizine: Overview

This comparison examines the pharmacological differences between **Acyclovir** and **Cetirizine**.

## Mechanism of Action

**Acyclovir**: Guanosine analogue inhibiting viral DNA polymerase.

**Cetirizine**: Second-generation H1 antihistamine.

## Pharmacokinetics

**Half-life**: Acyclovir — 2.5-3.3 hours; Cetirizine — 6.5-10 hours.

## Chemical Properties

**Molecular Formula**: Acyclovir — C8H11N5O3; Cetirizine — C21H25ClN2O3.

**Molecular Weight**: Acyclovir — 225.2050 g/mol; Cetirizine — 388.8900 g/mol.

**Type**: Acyclovir — Small molecule; Cetirizine — Small molecule.