The theophylline in this drug may add to the central nervous system stimulant effects of caffeine-containing foods or beverages such as chocolate, cocoa, tea, coffee, and cola drinks Avoid eating or drinking large amounts of these foods or beverages while taking this drug . If you have any questions about this, check with your family doctor.
The phenobarbital in this combination drug will add to the effects of alcohol and other CNS depressants - medication that slow down the nervous system, possibly causing drowsiness. Some examples of CNS depressants are antihistamines or drug for hay fever, other allergies, or colds; sedatives, tranquilizers, or sleeping drug; prescription pain drug or narcotics; other barbiturates; drug for seizures; muscle relaxants; or anesthetics, including some dental anesthetics Check with your family doctor before taking any of the above while you are using this drug .
A change in your usual behavior or physical well-being may effect the way this drug works in your body Check with your family doctor if you :
Before you have myocardial perfusion studies - a medical test that shows how well blood is flowing to your heart, tell the family doctor in charge that you are taking this drug. The results of the test may be effected by this drug.
This drug may cause some people to become dizzy, lightheaded, drowsy, or less alert than they are normally Make sure you know how you react to this drug before you drive, use machines, or do anything else that could be dangerous if you are dizzy or are not alert .