The Complete NCLEX-RN Pharmacology Guide: Master Drug Classifications

Understanding Drug Classifications

Pharmacology questions on the NCLEX-RN test your ability to safely administer medications and recognize adverse effects. Rather than memorizing individual drugs, focus on understanding drug classes and their shared characteristics.

The "Big 6" Drug Classes

These six drug classifications appear most frequently on the NCLEX-RN:

• Cardiovascular drugs — Beta-blockers, ACE inhibitors, calcium channel blockers
• Antibiotics — Penicillins, cephalosporins, fluoroquinolones
• Pain medications — Opioids, NSAIDs, acetaminophen
• Psychotropic drugs — SSRIs, antipsychotics, benzodiazepines
• Endocrine drugs — Insulin, thyroid medications, corticosteroids
• Anticoagulants — Heparin, warfarin, DOACs

Memory Techniques That Work

Use these proven strategies to retain pharmacology information.

The Suffix Method

Drug names often share suffixes that indicate their class:

• -olol = Beta-blockers (metoprolol, atenolol)
• -pril = ACE inhibitors (lisinopril, enalapril)
• -sartan = ARBs (losartan, valsartan)
• -statin = HMG-CoA reductase inhibitors (atorvastatin)