Diphenhydramine vs Finasteride

## Diphenhydramine vs Finasteride: Overview

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

## Mechanism of Action

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

**Finasteride**: Competitive inhibitor of 5-alpha-reductase type II.

## Pharmacokinetics

**Half-life**: Diphenhydramine — 2-8 hours; Finasteride — 5-6 hours.

## Chemical Properties

**Molecular Formula**: Diphenhydramine — C17H21NO; Finasteride — C23H36N2O2.

**Molecular Weight**: Diphenhydramine — 255.3550 g/mol; Finasteride — 372.5490 g/mol.

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