Acyclovir vs Erlotinib

## Acyclovir vs Erlotinib: Overview

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

## Mechanism of Action

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

**Erlotinib**: Reversible inhibitor of EGFR (HER1) tyrosine kinase, blocking autophosphorylation.

## Pharmacokinetics

**Half-life**: Acyclovir — 2.5-3.3 hours; Erlotinib — 36 hours.

## Chemical Properties

**Molecular Formula**: Acyclovir — C8H11N5O3; Erlotinib — C22H23N3O4.

**Molecular Weight**: Acyclovir — 225.2050 g/mol; Erlotinib — 393.4380 g/mol.

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