Phenytoin vs Promethazine

## Phenytoin vs Promethazine: Overview

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

## Mechanism of Action

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

## Pharmacokinetics

**Half-life**: Phenytoin — 22 hours; Promethazine — N/A.

## Chemical Properties

**Molecular Formula**: Phenytoin — C15H12N2O2; Promethazine — N/A.

**Molecular Weight**: Phenytoin — 252.2680 g/mol; Promethazine — N/A.

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