Erlotinib vs Losartan

## Erlotinib vs Losartan: Overview

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

## Mechanism of Action

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

**Losartan**: Angiotensin II receptor type 1 antagonist.

## Pharmacokinetics

**Half-life**: Erlotinib — 36 hours; Losartan — 2 hours.

## Chemical Properties

**Molecular Formula**: Erlotinib — C22H23N3O4; Losartan — C22H23ClN6O.

**Molecular Weight**: Erlotinib — 393.4380 g/mol; Losartan — 422.9200 g/mol.

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