Diphenhydramine vs Metformin

## Diphenhydramine vs Metformin: Overview

This comparison examines the pharmacological differences between **Diphenhydramine** and **Metformin**.

## Mechanism of Action

**Diphenhydramine**: First-generation H1 antihistamine with anticholinergic properties.

**Metformin**: Activates AMP-activated protein kinase, decreasing hepatic glucose production.

## Pharmacokinetics

**Half-life**: Diphenhydramine — 2-8 hours; Metformin — 4-9 hours.

## Chemical Properties

**Molecular Formula**: Diphenhydramine — C17H21NO; Metformin — C4H11N5.

**Molecular Weight**: Diphenhydramine — 255.3550 g/mol; Metformin — 129.1640 g/mol.

**Type**: Diphenhydramine — Small molecule; Metformin — Small molecule.