Relieve tension, anxiety, nervousness, and insomnia (trouble sleeping). Also helps you relax before having surgery or a medical procedure. Also treats epilepsy and other seizures. This medicine is a barbiturate.
You should not use this medicine if you have had an allergic reaction to pentobarbital, or to other barbiturates. You should not use this medicine if you are pregnant, or if you have porphyria (blood disease).
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
Make sure your doctor knows if you are also using steroid medicine (such as dexamethasone, prednisolone, prednisone, or Medrol®), or medicine for seizures such as phenytoin (Dilantin®), valproate sodium (Depacon®), or valproic acid (Depakene®).
Make sure your doctor knows if you are also using an MAO inhibitor such as Eldepryl®, Marplan®, Nardil®, or Parnate®, or a blood thinner such as warfarin (Coumadin®). Tell your doctor if you are using a medicine to treat an infection such as doxycycline (Vibramycin®) or griseofulvin (Grifulvin V®).
Birth control pills may not work as well while you are using phenobarbital. To keep from getting pregnant, use another form of birth control such as condoms, a diaphragm, or contraceptive foam or jelly.
There are many other drugs that interact with this medicine. Make sure your doctor knows all other medicines you are using.
Tell your doctor if you are using any medicines that make you sleepy. These include sleeping pills, cold and allergy medicine, narcotic pain relievers, and sedatives.
Do not drink alcohol while you are using this medicine.
Using this medicine while you are pregnant can harm your unborn baby. Use an effective form of birth control to keep from getting pregnant. If you think you have become pregnant while using the medicine, tell your doctor right away.
Make sure your doctor knows if you are breast feeding, have untreated depression, liver disease, or if you have a history of drug abuse.
This medicine may be habit-forming. If you feel that the medicine is not working as well, do not use more than your prescribed dose. Call your doctor for instructions.
Do not stop using this medicine suddenly without asking your doctor. You may need to slowly decrease your dose before stopping it completely.
This medicine may make you dizzy or drowsy. Avoid driving, using machines, or doing anything else that could be dangerous if you are not alert.