Cephalexin vs Erlotinib

## Cephalexin vs Erlotinib: Overview

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

## Mechanism of Action

**Cephalexin**: First-generation cephalosporin inhibiting cell wall synthesis.

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

## Pharmacokinetics

**Half-life**: Cephalexin — 0.5-1.2 hours; Erlotinib — 36 hours.

## Chemical Properties

**Molecular Formula**: Cephalexin — C16H17N3O4S; Erlotinib — C22H23N3O4.

**Molecular Weight**: Cephalexin — 347.3890 g/mol; Erlotinib — 393.4380 g/mol.

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