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Stay sharp with these must-know therapeutic ranges to ensure patient safety:

1️⃣ Digoxin: 0.8–2.0 ng/mL

Use: Heart failure, arrhythmias ❤️
Toxicity: Nausea, yellow vision (halos)

2️⃣ Lithium: 0.8–1.2 mEq/L

Use: Bipolar disorder 🌙
Toxicity: Tremors, confusion, seizures

3️⃣ Theophylline: 10–20 mcg/mL

Use: Asthma, COPD 🌬️
Toxicity: Nausea, restlessness, arrhythmias

4️⃣ Phenytoin: 10–20 mcg/mL

Use: Seizures ⚡
Toxicity: Ataxia, nystagmus, confusion

5️⃣ Vancomycin: 10–20 mcg/mL (trough)

Use: Severe bacterial infections 🦠
Toxicity: Nephrotoxicity, ototoxicity
These levels are lifesaving—memorize them for both clinicals and NCLEX prep! 🧠💪

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