Acyclovir vs Phenytoin

## Acyclovir vs Phenytoin: Overview

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

## Mechanism of Action

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

**Phenytoin**: Sodium channel blocker stabilizing inactive state.

## Pharmacokinetics

**Half-life**: Acyclovir — 2.5-3.3 hours; Phenytoin — 22 hours.

## Chemical Properties

**Molecular Formula**: Acyclovir — C8H11N5O3; Phenytoin — C15H12N2O2.

**Molecular Weight**: Acyclovir — 225.2050 g/mol; Phenytoin — 252.2680 g/mol.

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