Cetirizine vs Tamoxifen

## Cetirizine vs Tamoxifen: Overview

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

## Mechanism of Action

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

**Tamoxifen**: Selective estrogen receptor modulator (SERM).

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Tamoxifen — 5-7 days.

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Tamoxifen — C26H29NO.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Tamoxifen — 371.5150 g/mol.

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