Erlotinib vs Loratadine

## Erlotinib vs Loratadine: Overview

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

## Mechanism of Action

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

**Loratadine**: Second-generation H1 antihistamine with minimal CNS effects.

## Pharmacokinetics

**Half-life**: Erlotinib — 36 hours; Loratadine — 8 hours.

## Chemical Properties

**Molecular Formula**: Erlotinib — C22H23N3O4; Loratadine — C22H23ClN2O2.

**Molecular Weight**: Erlotinib — 393.4380 g/mol; Loratadine — 382.8800 g/mol.

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