PHENYTOIN-INJECTION, Dilantin (cont.)
SIDE EFFECTS: Pain at injection site, constipation, dizziness or drowsiness may occur. If these effects continue or worsen, inform your doctor. Unlikely but report: blurred vision, unsteadiness, nausea, mood changes or confusion, slurred speech, rash, insomnia, headache. Very unlikely but report: vomiting, stomach pain, uncoordinated movements, tingling in hands or feet, fever, yellowing of the eyes or skin, trouble breathing, swollen glands, sore throat, unusual bleeding or bruising. May cause enlargement of the gums. This can be minimized by maintaining good oral hygiene with regular brushing, flossing and massaging of the gums. If you notice other effects not listed above, contact your doctor or pharmacist.
PRECAUTIONS: Tell your doctor if you have: blood disorders (e.g., porphyria), allergies (especially drug allergies), lung problems, heart disease (including slow heart rate or heart blocks), liver disease. Use caution operating machinery or performing tasks requiring alertness. Limit alcohol use as it may increase the drowsiness effect of this medication. Limit your caffeine usage. Phenytoin is not recommended for use during pregnancy. Consult your doctor for details. This drug passes into breast milk. While there have been no reports of harm to a nursing infant, consult your doctor before breast-feeding.
DRUG INTERACTIONS: Inform your doctor about all the medicine you use (both prescription and nonprescription) especially if you take: "blood thinners" (warfarin), cimetidine, omeprazole, sucralfate, disulfiram, oral antifungal medication (azoles), xanthine drugs to treat asthma (theophylline), isoniazid, folic acid, pyrimethamine, sulfa antibiotics, rifamycins (e.g., rifabutin, rifampin), trimethoprim, amiodarone, fluoxetine, anti-cancer drugs, valproic acid, divalproex, estrogens, disopyramide, levodopa (Sinemet), digoxin, felodipine, primidone, felbamate, narcotic pain medicines (e.g., codeine), St John's wort, capecitabine. This drug may interfere with the effectiveness of birth control pills. Discuss using other methods of birth control with your doctor. Do not start or stop any medicine without doctor or pharmacist approval.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
Need help identifying pills and medications?
Back to Medications Index