Captopril vs Methylnaltrexone

## Captopril vs Methylnaltrexone: Overview

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

## Mechanism of Action

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

## Pharmacokinetics

**Half-life**: Captopril — 1.9 hours; Methylnaltrexone — N/A.

## Chemical Properties

**Molecular Formula**: Captopril — C9H15NO3S; Methylnaltrexone — N/A.

**Molecular Weight**: Captopril — 217.2850 g/mol; Methylnaltrexone — N/A.

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