Captopril vs Fentanyl

## Captopril vs Fentanyl: Overview

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

## Mechanism of Action

**Captopril**: First orally active ACE inhibitor; contains thiol group that binds zinc at ACE active site.

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

## Pharmacokinetics

**Half-life**: Captopril — 1.9 hours; Fentanyl — 2-4 hours.

## Chemical Properties

**Molecular Formula**: Captopril — C9H15NO3S; Fentanyl — C22H28N2O.

**Molecular Weight**: Captopril — 217.2850 g/mol; Fentanyl — 336.4700 g/mol.

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