Medications Study Guide

Medications is the single largest domain on the PTCE, accounting for 40% of the exam (36 out of 90 scored questions). This domain tests your knowledge of drug names (brand and generic), drug classifications, indications, mechanisms of action, side effects, adverse reactions, drug interactions, dosage forms, routes of administration, storage requirements, controlled substance schedules, OTC medications, and sig code interpretation. You must be comfortable with hundreds of commonly dispensed medications and their properties to pass this section.

The PTCE heavily tests the top 200 dispensed medications. You should know both the brand and generic name for each, the drug class, primary indication, common side effects, and any notable drug interactions or contraindications. Focus on the most commonly prescribed drug classes: statins (atorvastatin, rosuvastatin), ACE inhibitors (lisinopril, enalapril), ARBs (losartan, valsartan), SSRIs (sertraline, escitalopram, fluoxetine), proton pump inhibitors (omeprazole, pantoprazole), beta-blockers (metoprolol, atenolol), and opioid analgesics (hydrocodone, oxycodone). Use flashcards to drill brand-generic pairs daily.

Understanding drug classes helps you answer questions even when you encounter an unfamiliar medication. Key mechanisms to know: SSRIs block serotonin reuptake (treat depression, anxiety). Beta-blockers block beta-adrenergic receptors (treat hypertension, angina, arrhythmias). ACE inhibitors block angiotensin-converting enzyme (treat hypertension, heart failure). Statins inhibit HMG-CoA reductase (lower cholesterol). PPIs inhibit the proton pump in gastric parietal cells (treat GERD, ulcers). Benzodiazepines enhance GABA activity (treat anxiety, seizures). Fluoroquinolones inhibit bacterial DNA gyrase and topoisomerase IV (treat infections). Know the suffix patterns: -olol (beta-blockers), -pril (ACE inhibitors), -sartan (ARBs), -statin (HMG-CoA reductase inhibitors), -prazole (PPIs), -azepam/-olam (benzodiazepines).

The PTCE tests your ability to identify common and serious side effects. Key side effects by drug class: ACE inhibitors cause a persistent dry cough (switch to ARB if intolerable) and risk hyperkalemia. Statins can cause myopathy and rhabdomyolysis (monitor CK levels). Metformin can cause lactic acidosis (contraindicated in severe renal impairment). Warfarin has a narrow therapeutic index (monitor INR). Fluoroquinolones carry black box warnings for tendon rupture, peripheral neuropathy, and CNS effects. Opioids cause respiratory depression, constipation, and risk of dependence. Aminoglycosides are nephrotoxic and ototoxic. Know the difference between side effects (common, expected) and adverse drug reactions (unexpected, potentially dangerous).

The DEA classifies controlled substances into five schedules. Schedule I (CI): High abuse potential, no accepted medical use in the U.S. (heroin, LSD, marijuana under federal law, MDMA). Schedule II (CII): High abuse potential with accepted medical use (oxycodone, morphine, fentanyl, amphetamine, methylphenidate). No refills allowed; requires a new prescription each time. Schedule III (CIII): Moderate abuse potential (testosterone, ketamine, products containing less than 90mg of codeine per dosage unit). Up to 5 refills within 6 months. Schedule IV (CIV): Lower abuse potential (benzodiazepines, zolpidem, tramadol, carisoprodol). Up to 5 refills within 6 months. Schedule V (CV): Lowest abuse potential (cough preparations with less than 200mg codeine per 100mL, pregabalin, lacosamide).

Know the common dosage forms: tablets, capsules, solutions, suspensions, ointments, creams, patches (transdermal), inhalers (MDI, DPI, nebulizer), suppositories, ophthalmic drops, otic drops, and injectables (IV, IM, SubQ). Key concepts: extended-release formulations (ER, XR, LA, SR) should not be crushed. Enteric-coated tablets resist stomach acid and dissolve in the intestine. Sublingual and buccal medications bypass first-pass metabolism. Transdermal patches provide steady-state drug delivery. Reconstitution is required for certain antibiotics (amoxicillin suspension). Know beyond-use dating for reconstituted medications (typically 10-14 days refrigerated).

Because Medications accounts for 40% of the exam, spend the most study time here. Use spaced repetition flashcards for brand-generic pairs and drug classifications. Study 20-30 medications per day and review previously studied cards. Group medications by drug class rather than alphabetically. Practice identifying drugs by their suffix. Take mini exams focused on the Medications domain to test your recall under time pressure. PTCBprep by Arteura offers hundreds of medication-focused flashcards and practice questions aligned with the current PTCE blueprint.