Free video explainers

Videos

Animated explainers of high-yield topics, each with chapters, a full transcript and its sources. The player loads only when you press play.

By Alex G, BSN, RN, CEN, CCRN, CMC, NREMT-P · AI narration; script written and clinically reviewed by Alex G.

Pharmacology

Vasopressors Made Simple: Receptors, Drugs and MAP Targets8:13 · Oct 28, 2026
Heparin vs Warfarin: aPTT vs INR, HIT, Bridging, Antidotes and DOAC Reversal9:40 · Nov 3, 2026

IV Fluids Explained: Isotonic, Hypotonic, Hypertonic (NCLEX)9:42 · Nov 1, 2026

The One-Pagers summarize each topic on one page, and the Reference has every drug, drip, calculator and algorithm the videos mention.

Practice free in your browser2,150+ exam-style questions with rationales. No account, no ads. Also free on the App Store and Google Play.

For education and exam preparation only. Not medical advice; follow current guidelines and your institution’s protocols.