Diphenhydramine Citrate vs Fentanyl

## Diphenhydramine Citrate vs Fentanyl: Overview

This comparison examines the pharmacological differences between **Diphenhydramine Citrate** and **Fentanyl**.

## Mechanism of Action

**Fentanyl**: Highly potent synthetic mu-opioid receptor agonist approximately 100 times more potent than morphine.

## Pharmacokinetics

**Half-life**: Diphenhydramine Citrate — N/A; Fentanyl — 2-4 hours.

## Chemical Properties

**Molecular Formula**: Diphenhydramine Citrate — N/A; Fentanyl — C22H28N2O.

**Molecular Weight**: Diphenhydramine Citrate — N/A; Fentanyl — 336.4700 g/mol.

**Type**: Diphenhydramine Citrate — Small molecule; Fentanyl — Small molecule.