Ondansetron vs Phenylephrine

## Ondansetron vs Phenylephrine: Overview

This comparison examines the pharmacological differences between **Ondansetron** and **Phenylephrine**.

## Mechanism of Action

**Ondansetron**: Selective 5-HT3 receptor antagonist.

## Pharmacokinetics

**Half-life**: Ondansetron — 3-5 hours; Phenylephrine — N/A.

## Chemical Properties

**Molecular Formula**: Ondansetron — C18H19N3O; Phenylephrine — N/A.

**Molecular Weight**: Ondansetron — 293.3660 g/mol; Phenylephrine — N/A.

**Type**: Ondansetron — Small molecule; Phenylephrine — Small molecule.