Grapefruit Juice
Grapefruit juice can increase the level of
Verelan PM in your blood, increasing your risk of side effects. Grapefruit juice should be avoided in most cases. However, if your healthcare provider decides that it is okay for you to drink grapefruit juice, you should do so consistently and in moderation.
Lithium (Eskalith, Eskalith CR, Lithobid)
Lithium can interact unpredictably with
Verelan PM. Sometimes Verelan PM can make lithium less effective; other times it can increase
lithium toxicity. You should be monitored very carefully when you are taking these two medications together.
Phenobarbital (Luminal)
Phenobarbital may decrease the level of Verelan PM in your blood, perhaps making it less effective. Your healthcare provider may need to increase your
Verelan PM dosage.
Quinidine
Verelan PM can increase the level of quinidine in your blood, increasing your risk of side effects. Combining these two medications may also increase your risk of low
blood pressure (hypotension). Be sure to talk with your healthcare provider before taking quinidine with Verelan PM.
Rifampin (Rifadin)
Rifampin can greatly decrease the level of Verelan PM in your blood, making it much less effective. In general, these medications should not be combined.
Telithromycin (Ketek)
There has been a report of low blood pressure (hypotension), arrhythmias, and other problems in a patient who took Verelan PM with telithromycin. However, it is not known if this will be a problem for most people. Talk to your healthcare provider before combining Verelan PM with telithromycin.
Theophylline
Verelan PM can increase the level of
theophylline in your blood, increasing your risk of side effects. Your healthcare provider may need to closely monitor the level of theophylline in your blood, especially when starting or stopping Verelan PM.
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