Diphenhydramine vs Methylprednisolone

## Diphenhydramine vs Methylprednisolone: Overview

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

## Mechanism of Action

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

**Methylprednisolone**: Intermediate-acting synthetic glucocorticoid.

## Pharmacokinetics

**Half-life**: Diphenhydramine — 2-8 hours; Methylprednisolone — 18-36 hours.

## Chemical Properties

**Molecular Formula**: Diphenhydramine — C17H21NO; Methylprednisolone — C22H30O5.

**Molecular Weight**: Diphenhydramine — 255.3550 g/mol; Methylprednisolone — 374.4710 g/mol.

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