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A focused review of the medication classes NCLEX tests most heavily and the ones that carry the highest risk in real clinical practice: anticoagulants, insulin, opioids, cardiac medications, and high-risk electrolyte replacements. For each drug class, you'll get the key nursing considerations, critical monitoring parameters, patient teaching points, and NCLEX-style practice questions — organized as a quick-reference chart you can review right before exam day or before a clinical shift. Built around the medications where getting it right actually matters, not a generic run-through of every drug in the textbook.