Theophylline, Ephedrine, Guaifenesin, and Phenobarbital (Systemic)
Precautions While Using This MedicineYour doctor should check your progress at regular visits
,
especially for the first few weeks after you begin taking this medicine. A
blood test may be taken to help your doctor decide whether the dose of this
medicine should be changed.
The theophylline in this medicine may add to the central nervous system
(CNS) 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 medicine
. If you have any questions about this, check with your
doctor.
The phenobarbital in 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; other barbiturates;
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
.
A change in your usual behavior or physical well-being may affect the way
this medicine works in your body. Check with your doctor
if you
:
-
have a fever of 102 �F or higher for at least 24 hours or higher
than 100 �F for longer than 24 hours.
-
start or stop smoking.
-
start or stop taking another medicine.
-
change your diet for a long time.
Before you have myocardial perfusion studies (a medical test that shows
how well blood is flowing to your heart), tell the medical doctor in charge
that you are taking this medicine. The results of the test may be affected
by this medicine.
This medicine 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 medicine before you drive, use machines, or do anything
else that could be dangerous if you are dizzy or are not alert
.
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