Citalopram vs Erlotinib

## Citalopram vs Erlotinib: Overview

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

## Mechanism of Action

**Citalopram**: Selective serotonin reuptake inhibitor (SSRI); racemic mixture with escitalopram as active S-enantiomer.

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

## Pharmacokinetics

**Half-life**: Citalopram — 35 hours; Erlotinib — 36 hours.

## Chemical Properties

**Molecular Formula**: Citalopram — C20H21FN2O; Erlotinib — C22H23N3O4.

**Molecular Weight**: Citalopram — 324.3920 g/mol; Erlotinib — 393.4380 g/mol.

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