Diphenhydramine vs Fentanyl

Diphenhydramine vs Fentanyl: Overview

This comparison examines the pharmacological differences between Diphenhydramine and Fentanyl.

Mechanism of Action

Diphenhydramine: First-generation H1 antihistamine with anticholinergic properties.

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

Pharmacokinetics

Half-life: Diphenhydramine — 2-8 hours; Fentanyl — 2-4 hours.

Chemical Properties

Molecular Formula: Diphenhydramine — C17H21NO; Fentanyl — C22H28N2O.

Molecular Weight: Diphenhydramine — 255.3550 g/mol; Fentanyl — 336.4700 g/mol.

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