- It is used to help control certain kinds of seizures.
- It is used to treat anxiety.
- It is used to treat sleep problems.
- It may be given to you for other reasons. Talk with the doctor.
- If you have an allergy to phenobarbital or any other part of this drug.
- If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
- If you have any of these health problems: A block in the airway, liver disease, or shortness of breath.
- If you or a family member have ever had porphyria.
- Tell dentists, surgeons, and other doctors that you use this drug.
- This drug may be habit-forming with long-term use.
- Do not stop taking this drug all of a sudden without calling your doctor. You may have a greater risk of signs of withdrawal. If you need to stop this drug, you will want to slowly stop it as ordered by your doctor.
- Have your blood work checked. Talk with your doctor.
- Avoid driving and doing other tasks or actions that call for you to be alert or have clear eyesight until you see how this drug affects you.
- Avoid drinking alcohol.
- Talk with your doctor before you use other drugs and natural products that slow your actions.
- If you are 65 or older, use this drug with care. You could have more side effects.
- Birth control pills and other hormone-based birth control may not work as well to prevent pregnancy. Use 2 kinds of birth control while taking this drug.
- This drug may cause harm to the unborn baby if you take it while you are pregnant. If you get pregnant while taking this drug, call your doctor right away.
- Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using this drug while you are pregnant.
- Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.
- Do not give this drug to a newborn. It has benzyl alcohol.
- Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- Shortness of breath.
- Trouble breathing, slow breathing, or shallow breathing.
- Very bad dizziness or passing out.
- Slow heartbeat.
- Big change in balance.
- Change in thinking clearly and with logic.
- Very nervous and excitable.
- Feeling very tired or weak.
- Bone pain.
- Not able to sleep.
- If seizures are worse or not the same after starting this drug.
- Feeling sleepy.
- Change in balance.
- Upset stomach or throwing up.
- Feeling tired or weak.
- Irritation where the shot is given.
All oral products:
- Take with or without food. Take with food if it causes an upset stomach.
- Measure liquid doses carefully. Use the measuring device that comes with this drug. If there is none, get an oral syringe, a dropper, a spoon, or a cup (only for older children) from your pharmacist.
- It is given as a shot into a muscle or vein.
- Take a missed dose as soon as you think about it.
- If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
- Do not take 2 doses at the same time or extra doses.
- Store at room temperature.
- Store in a dry place. Do not store in a bathroom.
- Protect from light.
- Keep all drugs out of the reach of children and pets.
- Check with your pharmacist about how to throw out unused drugs.
- If your symptoms or health problems do not get better or if they become worse, call your doctor.
- Do not share your drugs with others and do not take anyone else’s drugs.
- Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
- Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.
- Some drugs may have another patient information leaflet. If you have any questions about this drug, please talk with your doctor, pharmacist, or other health care provider.
- If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
If you have any questions or concerns, talk with a member of your healthcare team. You can reach them Monday through Friday from 9:00 am to 5:00 pm at ____________________. After 5:00 pm, during the weekend, and on holidays, please call____________________. If there’s no number listed, or you’re not sure, call 212-639-2000.
Phenobarbital©2015 Memorial Sloan Kettering Cancer Center - Generated on December 1, 2015