Phenytek Drug Interactions

Disulfiram 
Disulfiram can raise the amount of Phenytek in your blood, increasing your risk of side effects. Your healthcare provider may need to measure the level of Phenytek in your blood and adjust your dose as necessary.
 
Doxycycline
Phenytek may make doxycycline less effective. If you are taking these drugs together, your healthcare provider may need to increase your doxycycline dosage.
 
Estrogen Medications
Estrogens can raise the amount of Phenytek in your blood, increasing your risk of side effects. Your healthcare provider may need to measure the level of Phenytek in your blood and adjust your dose as necessary. Also, Phenytek can make estrogens less effective, which is especially important for estrogens in oral contraceptives (birth control pills).
 
Folic Acid
Folic acid may decrease the level of Phenytek in your blood. Check with your healthcare provider before combining Phenytek with folic acid.
 
Fluoxetine
Fluoxetine can raise the amount of Phenytek in your blood, increasing your risk of side effects. Your healthcare provider may need to measure the level of Phenytek in your blood and adjust your dose as necessary.
 
Fluvastatin
Fluvastatin can raise the amount of Phenytek in your blood, increasing your risk of side effects. Your healthcare provider may need to measure the level of Phenytek in your blood and adjust your dose as necessary. Additionally, Phenytek may decrease fluvastatin levels, perhaps making it less effective.
 
Fluvoxamine
Fluvoxamine can raise the amount of Phenytek in your blood, increasing your risk of side effects. Your healthcare provider may need to measure the level of Phenytek in your blood and adjust your dose as necessary.
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Phenytek Drug Information

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