Cetirizine vs Tacrolimus

## Cetirizine vs Tacrolimus: Overview

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

## Mechanism of Action

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

**Tacrolimus**: Calcineurin inhibitor binding FKBP12; suppresses IL-2 transcription.

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Tacrolimus — 12 hours.

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Tacrolimus — C44H69NO12.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Tacrolimus — 804.0180 g/mol.

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