Common Drug Interactions
Medications associated with interactions: Cisapride
Warfarin
Digoxin
Quinidine
Lithium
Amiodarone
Non-sedating anti-histamines (Allegra, Claritin)
Monoamino oxidase inhibitors (Nardil, Parnate, Marplan)
Anti-fungals (fluconazole, itraconazole, ketoconazole)
Anti-depressants
Theophylline
Non-steroidal anti-inflammatory drugs (NSAID’s)
Alcohol
Caffeine
Nicotine
Anti-microbials (metronidazole, erythromycin)
Vaccines
Herbal medications (garlic, Gingko, St. John’s Wort)
Anti-convulsants (phenytoin, carbamezapine)
Drugs that stimulate the metabolism of other medications:
Carbamazepine
(Tegretol)
Phenytoin (Dilantin)
Glutethimide (Doriden)
Primidone (Mysoline)
Rifampin
Ethanol (alcohol), continuos ingestion
Nicotine (smoking)
Pentobarbital (Nembutal)
Secobarbital (Seconal)
Amobarbital (Amytal)
Butabarbital (Butisol)
Drugs that inhibit the metabolism of other medications:
Allopurinol (Zyloprim)
Ketoconazole (Nizoral)
Cimetidine (Tagamet)
Metronidazole (Flagyl, Protostat)
Ciprofloxacin (Cipro)
Diltiazem (Cardizem, Tiazac, Dilacor)
Ethanol (acute ingestion - intoxication)
Fluconazole (Diflucan)
Propoxyphene (Darvon, Darvocet)
Verapamil (Calan, Isoptin, Verelan)
Sulfamethoxazole (ingredient in Bactrim DS, Septra DS)
Miconazole
Isoniazid (INH)
Itraconazole (Sporanox)
Erythromycin (EES, Ery-tab, Eryc)
Phenelzine (Nardil)
Isocarboxazid (Marplan)
Tranylcypromine (Parnate)
Quinidine (Quinidex, Quina-glute)Omeprazole (Prilosec)
Fluoxitine (Prozac)
Sertraline (Zoloft)
Paroxetine (Paxil)
Many medications of AIDS
Nefazodone (Serzone)
Common medications that interact with Warfarin (Coumadin)
- note this is not a complete list
Amiodarone (Cordarone)
Anabolic steroids (Androgens)
Carbamezapine (Tegretol)
Clofibrate (Atromid-S)
Dextrothyronine (Choloxin)
Disulfuram (Antabuse)
Ethanol - Intoxication
Gluthethimide (Doriden)
Metronidazole (Flagyl, Protostat)
Non-steroidal anti-inflammatory medications (NSAID’s)