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 blood thinners (Coumadin®), corticosteroids (cortisone, prednisone), griseofulvin (Grifulvin®), doxycycline (Vibramycin®), medicine for seizures (such as Depakote®, Dilantin®), MAO inhibitors (Eldepryl®, Marplan®, Nardil®, Parnate®), or hormones (including birth control pills).
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 breastfeeding, or if you have liver disease, kidney disease, food or drug allergies, a history of alcohol or drug abuse, or have any health problems that cause pain.
Tell your doctor if you feel depressed or have thoughts of suicide.
This medicine may cause a serious type of allergic reaction called anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention. Stop taking this medicine and call your doctor right away if you have itching, hives, trouble breathing, or any swelling of your hands, face, or mouth when you take this medicine.
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. This medicine may also cause sleep-related behaviors such as sleep-driving, making phone calls, or preparing and eating food while asleep or not fully awake. If these reactions occur, tell your doctor right away.
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.
Using too much of this medicine can cause serious breathing problems. Symptoms of an overdose include: Extreme dizziness or fainting, shortness of breath or shallow breathing, fast heartbeat, and low body temperature.
Do not stop using this medicine suddenly without asking your doctor. You may need to slowly decrease your dose before stopping it completely.
If you have any of these symptoms after you stop using pentobarbital, call your doctor right away: Anxiety, trembling or twitching, weakness, trouble seeing, dizziness, confusion, or seizures.