Fentanyl vs Phenytoin

## Fentanyl vs Phenytoin: Overview

This comparison examines the pharmacological differences between **Fentanyl** and **Phenytoin**.

## Mechanism of Action

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

**Phenytoin**: Sodium channel blocker stabilizing inactive state.

## Pharmacokinetics

**Half-life**: Fentanyl — 2-4 hours; Phenytoin — 22 hours.

## Chemical Properties

**Molecular Formula**: Fentanyl — C22H28N2O; Phenytoin — C15H12N2O2.

**Molecular Weight**: Fentanyl — 336.4700 g/mol; Phenytoin — 252.2680 g/mol.

**Type**: Fentanyl — Small molecule; Phenytoin — Small molecule.