Ondansetron vs Phenytoin

## Ondansetron vs Phenytoin: Overview

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

## Mechanism of Action

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

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

## Pharmacokinetics

**Half-life**: Ondansetron — 3-5 hours; Phenytoin — 22 hours.

## Chemical Properties

**Molecular Formula**: Ondansetron — C18H19N3O; Phenytoin — C15H12N2O2.

**Molecular Weight**: Ondansetron — 293.3660 g/mol; Phenytoin — 252.2680 g/mol.

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