When Should Dilantin Levels Be Checked?

A level can be taken 2-4 hours following an IV loading or top-up dose (12-24 hours for oral doses) and levels should then be monitored every 24 hours until control is achieved and concentration has stabilised.

When should phenytoin levels be checked?

After a patient has received a loading dose of intravenous phenytoin, levels can be checked one hour after the dose. If loading is achieved by oral dosing, phenytoin levels can be checked 24 hours after the last dose10.

Does phenytoin require blood monitoring?

Your healthcare provider must monitor your blood to make sure you are getting the correct dose. Too much can be toxic. Not enough leaves your seizures uncontrolled. You may have this test more often when you first start taking the medicine and then regularly throughout treatment.

Marcus Vance

Marcus Vance

Cybersecurity & Digital Privacy Researcher

Marcus Vance is a cybersecurity auditor and technology writer dedicated to educating the public about online safety, data privacy regulations, enterprise security, and emerging cyber threats.