Uploaded August 2025 | Updated September 2026, 3 days ago
⚠️ WARNING: Most Nursing Students Fail for the Same 3 Reasons.
If you’re still “just watching videos,” you’re at risk. 👉 Get the Survival Plan That Actually Works: nursing.com
Want to know if you're ready to pass the NCLEX? Get your NCLEX Readiness Score → nursing.com
Don’t waste time memorizing 20 therapeutic levels — these are the 4 that actually show up on the NCLEX: Digoxin, Lithium, Theophylline, and Phenytoin.
In this video, we break down exactly what the therapeutic range is for each drug, why it matters, and how to spot signs of toxicity (yes, including halo vision and caffeine baby vibes).
✅ Digoxin: 0.8–2 mcg/L
✅ Lithium: 0.8–1.2 mmol/L
✅ Theophylline: 10–20 mcg/mL
✅ Phenytoin: 10–20 mg/L
🎓 Know what level to expect and how to act — whether it’s seizures, apnea, or heart failure. We make it stick.
🧠 What You’ll Learn:
The 4 therapeutic drug levels you have to know
Signs of digoxin and theophylline toxicity
Why lithium monitoring is so important for new therapy
How phenytoin levels are adjusted in real-world neuro ICU care
Why trough levels matter and how to interpret them
Bonus tip: What level to expect in neonates vs adults
Visit us at nursing.com/medical-disclaimer for disclaimer information.
NCLEX®, NCLEX-RN® are registered trademarks of the National Council of State Boards of Nursing, INC. and hold no affiliation with NURSING.com.
⚠️ WARNING: Most Nursing Students Fail for the Same 3 Reasons.
If you’re still “just watching videos,” you’re at risk. 👉 Get the Survival Plan That Actually Works: nursing.com
Want to know if you're ready to pass the NCLEX? Get your NCLEX Readiness Score → nursing.com
Don’t waste time memorizing 20 therapeutic levels — these are the 4 that actually show up on the NCLEX: Digoxin, Lithium, Theophylline, and Phenytoin.
In this video, we break down exactly what the therapeutic range is for each drug, why it matters, and how to spot signs of toxicity (yes, including halo vision and caffeine baby vibes).
✅ Digoxin: 0.8–2 mcg/L
✅ Lithium: 0.8–1.2 mmol/L
✅ Theophylline: 10–20 mcg/mL
✅ Phenytoin: 10–20 mg/L
🎓 Know what level to expect and how to act — whether it’s seizures, apnea, or heart failure. We make it stick.
🧠 What You’ll Learn:
The 4 therapeutic drug levels you have to know
Signs of digoxin and theophylline toxicity
Why lithium monitoring is so important for new therapy
How phenytoin levels are adjusted in real-world neuro ICU care
Why trough levels matter and how to interpret them
Bonus tip: What level to expect in neonates vs adults
Visit us at nursing.com/medical-disclaimer for disclaimer information.
NCLEX®, NCLEX-RN® are registered trademarks of the National Council of State Boards of Nursing, INC. and hold no affiliation with NURSING.com.
