Classification of Drugs and Their Endings
| Classification | Common Drug Ending | Example |
|---|---|---|
| ACE inhibitors | -pril | benazepril |
| Antianxiety drugs | -lam | alprazolam |
| -pam | diazepam | |
| Antibiotics | -cillin | penicillin |
| -mycin | erythromycin | |
| -cycline | tetracycline | |
| -oxacin | ciprofloxacin | |
| Antidiabetics | -gliptin | sitagliptin |
| Antihyperlipidemics | -statin | lovastatin |
| Antiviral | -vir | acyclovir |
| Beta blockers | -olol | propranolol |
| Calcium channel blockers | -dipine | amlodipine |
| Diuretics | -mide | acetazolamide |
| -zide | hydrochlorothiazide | |
| Local anesthetics | -caine | novocaine |
| Opioid analgesics | -done | primidone |
| Oral contraceptives | -diol | estradiol |
| Proton pump inhibitor | -oprazole/-eprazole | esomeprazole |
| Steroids | -sone | cortisone |
Food–Drug Interactions
| Food | Drug | Interaction |
|---|---|---|
| Any food | Amoxicillin | Decreased absorption |
| Ampicillin | ||
| Aspirin | ||
| Erythromycin | ||
| Levodopa | ||
| Methotrexate | ||
| Phenobarbital | ||
| Tetracycline | ||
| Dietary fats | Diazepam | Increased absorption |
| Phenytoin | ||
| Diets rich in vitamin K (foods such as broccoli, liver, beans, rice, pork, and fish) | Warfarin (Coumadin) | Antagonistic effect |
| Grapefruit juice | Cyclosporine | Increased absorption |
| Caffeine | Prolonged caffeine half-life | |
| Warfarin (Coumadin) | Delayed excretion of hydroxycoumarin | |
| Lovastatin | Increased lovastatin and metabolite concentrations | |
| Quinidine | Delayed absorption; inhibited metabolism of quinidine | |
| High-fat meal | Digoxin | Decreased absorption |
| Warfarin (Coumadin) | ||
| High-fiber meal | Digoxin | Decreased absorption |
| Lovastatin | ||
| High-pectin foods | Acetaminophen | Delayed absorption |
| High-protein diet | Levodopa | Decreased absorption |
| Iron | Methyldopa | Decreased absorption |
Prescription Requirements for Controlled Substances
| Drug | Verbal Orders | Written Rx | Refills |
|---|---|---|---|
| Schedule II | No | Yes | No |
| Schedule III | Yes | Yes | 5× or 6 months |
| Schedule IV | Yes | Yes | 5× or 6 months |
| Schedule V | Yes | Yes | Yes |
NOTE: Schedule I drugs are not for medicinal use.
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