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3 Pharmacology Mnemonics That Will Save You on the NCLEX

High-yield memory tricks tied to mechanism, not just random acronyms.

Three hooks on a pegboard holding a vial, an IV bag and a pill bottle.
HM
HLT Mastery Team
Editorial Team
2 min readUpdated September 2026

Memorize every drug for the NCLEX and you'll drown. Learn a handful of memory tricks tied to how drugs actually work and you can reason through questions you've never seen. Here are three that pull their weight.

Mnemonics work like memory hooks: they hold drug facts in place so they stick under exam pressure.

1. SLUDGE: Cholinergic Drug Effects

When a cholinergic drug (or cholinesterase inhibitor) amps up your parasympathetic nervous system, think SLUDGE:

  • S: Salivation
  • L: Lacrimation (tearing)
  • U: Urination
  • D: Diaphoresis (sweating)
  • G: GI cramping
  • E: Emesis (vomiting)

2. Drug Suffix Stems: Decode Any Drug Name

You don't need to memorize 300 individual drugs. Learn the suffixes and you can identify the class on sight:

  • -olol → Beta blockers (metoprolol, atenolol)
  • -pril → ACE inhibitors (lisinopril, enalapril)
  • -sartan → ARBs (losartan, valsartan)
  • -statin → Cholesterol-lowering (atorvastatin)
  • -dipine → Calcium channel blockers (amlodipine)

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3. Anticoagulant Monitoring, "aPTT for the P, PT/INR for the Pill"

Heparin is parenteral (IV/subQ) → monitor aPTT. Warfarin is the pill (oral) → monitor PT/INR. Match the P's and you'll never mix them up.

DimensionHeparinWarfarin
RouteParenteral (IV/subQ)The pill (oral)
MonitoringaPTTPT/INR
AntidoteProtamineVitamin K

Make Them Stick

A mnemonic only works if you pair it with understanding. Learn the shortcut, then immediately ask why it's true: that link is what holds up under exam pressure. Drill all three in NCLEX-style questions until they fire before you finish reading the stem.

Frequently Asked Questions

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Pharmacological and Parenteral Therapies makes up 13–19% of the NCLEX-RN, making it one of the largest single content areas on the exam.

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Written by HLT Mastery Team

Study guides from the HLT Mastery editorial team, written and reviewed against the current exam blueprint.

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