If you will be using this medicine regularly for a long time:
- Your doctor should check your progress at regular visits.
- Do not stop using it without first checking with your doctor. Your doctor may want you to reduce gradually the amount you are using before stopping completely.
This medicine will add to the effects of alcohol and other CNS depressants (medicines that slow down the nervous system, possibly causing drowsiness). Some examples of CNS depressants are antihistamines or medicine for hay fever, other allergies, or colds; sedatives, tranquilizers, or sleeping medicine; prescription pain medicine or narcotics; medicine for seizures; muscle relaxants; or anesthetics, including some dental anesthetics. Check with your doctor before taking any of the above while you are using this medicine .
Before you have any medical tests, tell the medical doctor in charge that you are taking this medicine. The results of the metyrapone test may be affected by this medicine.
If you have been using this medicine for a long time and you think that you may have become mentally or physically dependent on it, check with your doctor. Some signs of mental or physical dependence on barbiturates are:
- a strong desire or need to continue taking the medicine.
- a need to increase the dose to receive the effects of the medicine.
- withdrawal side effects (for example, anxiety or restlessness, convulsions [seizures], feeling faint, nausea or vomiting, trembling of hands, trouble in sleeping) occurring after the medicine is stopped.
If you think you or someone else may have taken an overdose of this medicine, get emergency help at once. Taking an overdose of a barbiturate or taking alcohol or other CNS depressants with the barbiturate may lead to unconsciousness and possibly death. Some signs of an overdose are severe drowsiness, severe confusion, severe weakness, shortness of breath or slow or troubled breathing, slurred speech, staggering, and slow heartbeat.
This medicine may cause some people to become dizzy, lightheaded, drowsy, or less alert than they are normally. Even if taken at bedtime, it may cause some people to feel drowsy or less alert on arising. Make sure you know how you react to this medicine before you drive, use machines, or do anything else that could be dangerous if you are dizzy or are not alert .
Oral contraceptives (birth control pills) containing estrogen may not work properly if you take them while you are taking barbiturates. Unplanned pregnancies may occur. You should use a different or additional means of birth control while you are taking barbiturates. If you have any questions about this, check with your health care professional.