Phenobarbital

Medically Reviewed by Dr. Harshi Dhingra, M.D.

Last Reviewed: Jul 07, 2022

Pros & Cons


What are the pros and cons of phenobarbital?

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  • Phenobarbital is an effective medication to treat certain types of seizures.
  • It is available in tablet and liquid form in various doses, so it’s easy to adjust the dose.
  • A low-cost generic form of this medicine is available.

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  • Phenobarbital can be habit-forming and may cause withdrawal symptoms if you stop taking it suddenly, especially if you have been on a larger dose or long-term treatment.
  • This seizure medication needs regular dose adjustment. You need to have periodic blood tests to check phenobarbital blood levels. Your doctor may put you on a higher or lower dose based on the results of these tests.
  • Phenobarbital may not be suitable for people with severe liver disease or breathing problems.