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Coumadin
Drugs Which Interfere with Coumadin Regulation
Increased Coumadin® Effect
Highly Probable
- Alcohol (if concomitant liver disease)
- Amiodarone
- Cimetadine
- Clofibrate
- Cotrimoxazole
- Erythromycin
- Fluconazole
- Isoniazid
- Metronidazole
- Miconazole
- Omeprazole
- Phenylbutazone
- Piroxicam
- Propafenone
- Propanolol
- Sulfinpyrazone Probable
- Acetaminophen (Tylenol®)
- Anabolic steroids
- Aspirin
- Chloral Hydrate
- Ciprofloxacin
- Dextropropoxyphene
- Disulriam
- Quinidine
- Phenytoin (Dilantin®)
- Simvastatin
- Tamoxifen
- Tetracycline
- Influenza vaccine Possible
- Disopyramide
- 5-Fluorouracil
- Ifosphamide
- Lovastatin
- Metolazone
- Nalidixic Acid
- Norfloxacin
- Ofloxacin
- Cefamandole
- Cefazolin
- Gemfibrozil
- Heparin
- Indomethacin
- Sulfisoxazole
Decreased Coumadin® Effect
Highly Probable
- Barbiturates
- Carbamazepine
- Chlorodiazepoxide
- Cholestyramine
- Griseofulvin
- Nafcillin
- Rifampin
- Sucralfate Probable
- Dicloxacillin Possible
- Azathioprine
- Cyclosporine
- Etrelinate
- Trazodone
No Coumadin® Effect
Highly Probable
- Antacids
- Atenolol
- Bumetanide
- Diflunisal
- Enoxacin
- Famotidine
- Felodipine
- Fluoxetine
- Ketorolac
- Metoprolol
- Moricizine
- Naproxen
- Nitrazepam
- Nizatidine
- Psyllium
- Ranitidine probable
- Ibuprofen
- Ketoconazole
- Ketoprofen doubtful
- Diltiazem
- Tobacco
- Vancomycin
Coumadin Information
- Main
- Coumadin and your Dentist
- Dietary Concerns
- Helpful Precautions and Advice
- Indications for Usage
- Interactions with Other Drugs
- Mechanisms of Action
- Monitoring and Dose Adjustments
- Pill Colors and Strengths
- Pregnancy and Coumadin
- Surgery/Elective Procedures
- Use in Teens
- Using Coumadin Safely