Diphenhydramine vs Penicillin G

## Diphenhydramine vs Penicillin G: Overview

This comparison examines the pharmacological differences between **Diphenhydramine** and **Penicillin G**.

## Mechanism of Action

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

## Pharmacokinetics

**Half-life**: Diphenhydramine — 2-8 hours; Penicillin G — N/A.

## Chemical Properties

**Molecular Formula**: Diphenhydramine — C17H21NO; Penicillin G — N/A.

**Molecular Weight**: Diphenhydramine — 255.3550 g/mol; Penicillin G — N/A.

**Type**: Diphenhydramine — Small molecule; Penicillin G — Small molecule.