The attached video explains the drug for pulmonary embolism - Heparin. Its mechanism of action, usage, dosage, adverse effects, and contraindications are described. TIMELINE: 0:07 Example of a case 1:10 Diagnosis idea 2:00 What is heparin? 2:11 Pharmacokinetics of heparin 2:29 Intrinsic pathway 3:00 Extrinsic pathway 3:15 Common pathway 3:40 Mechanism of action 5:18 Uses 5:37 Dosage 6:04 Adverse effects 6:33 Antidote to heparin 6:50 Contraindications 7:08 Summary