Ethinyl Estradiol And Levonorgestrel (EC): What Other Drugs Will Affect Ethinyl Estradiol And Levonorgestrel Ec

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What other drugs will affect ethinyl estradiol and levonorgestrel (EC)?

Some drugs may decrease the effectiveness of ethinyl estradiol and levonorgestrel (EC), which may result in pregnancy. Before taking ethinyl estradiol and levonorgestrel (EC), talk to your doctor if you are taking any of the following medicines:

• a penicillin antibiotic such as amoxicillin (Amoxil, Trimox, Augmentin, others), penicillin (Veetids, Pen Vee K, Bicillin, Permapen, others), ampicillin (Principen, Omnipen, Totacillin, others), bacampicillin (Spectrobid), carbenicillin (Geocillin), cloxacillin (Cloxapen, Tegopen), dicloxacillin (Dynapen, Dycill, others), nafcillin (Unipen, others), or oxacillin (Bactocill, others);
• a tetracycline antibiotic such as demeclocycline (Declomycin), doxycycline (Doryx, Doxy, Vibramycin, Vibra-Tabs, others), minocycline (Minocin), or tetracycline (Sumycin, Achromycin, Robitet, Panmycin, others);
• a barbiturate such as amobarbital (Amytal), butabarbital (Butisol), mephobarbital (Mebaral), secobarbital (Seconal), or phenobarbital (Luminal, Solfoton);
• a seizure or pain medicine such as phenytoin (Dilantin), primidone (Mysoline), ethosuximide (Zarontin), carbamazepine (Tegretol), and others; or
• rifampin (Rifadin).

You may require a dosage adjustment or special monitoring during treatment if you are taking any of the medicines listed above.

Drugs other than those listed here may also interact with ethinyl estradiol and levonorgestrel (EC). Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines.

Last updated:	June 28, 2006