Phenobarbital is a barbiturate drug. It is a sedative and hypnotic medication. It is used to treat seizures, insomnia, and anxiety. It can also be used as an emergency medication to stop a seizure. Phenobarbital is a Schedule II drug in the United States.Phenobarbital is a central nervous system depressant. It works by slowing down the brain and nervous system. This can make you feel calm and sleepy. Phenobarbital is also an anticonvulsant. It works by keeping seizure activity in the brain from being too high.


Phenobarbital is used to treat:

Seizures: Phenobarbital is used to treat all types of seizures. It is also used as an emergency medication to stop a seizure.

Insomnia: Phenobarbital is used to treat insomnia. It can help you fall asleep and stay asleep.

Anxiety: Phenobarbital is used to treat anxiety. It can help you feel less anxious and more relaxed.

Phenobarbital may be habit-forming, even at regular doses. If you have a history of drug or alcohol abuse, you may be more likely to become addicted to phenobarbital.

Avoid phenobarbital with Allergic :

You should not take phenobarbital if you are allergic to it, or if you have:

  • Porphyria (a genetic enzyme disorder that causes symptoms affecting the skin or nervous system)
  • Severe liver disease
  • Severe kidney disease
  • A history of addiction to drugs or alcohol

Contraindications phenobarbital

To make sure phenobarbital is safe for you, tell your doctor if you have ever had:

  • Asthma, COPD, or other breathing problems
  • Depression, mental illness, or suicidal thoughts
  • A history of drug or alcohol abuse

If you take other medications to treat seizures, such as phenytoin or carbamazepine, your doctor will need to check your blood level of phenobarbital more often.

Phenobarbital can make birth control pills less effective. Ask your doctor about using a non-hormonal birth control (condom, diaphragm with spermicide) to prevent pregnancy.

Phenobarbital can pass into breast milk and may harm a nursing baby. You should not breast-feed while you are taking phenobarbital.

Pregnancy and pregnancy

Phenobarbital may be harmful to an unborn baby. If you take phenobarbital during pregnancy, your baby could become dependent on the drug. This can lead to life-threatening withdrawal symptoms in the baby after it is born. Babies born dependent on habit-forming medicine may need medical treatment for several weeks. Tell your doctor if you are pregnant or plan to become pregnant.

Do not give this medicine to a child without medical advice.