Pharmacology LMW heparin is preferred over unfractionated heparin because: A LMW heparin directly inhibit thrombin whereas unfractionated heparin acts activation of anti thrombin B LMW heparins have higher risk of causing bleeding C LMW heparin can be given subcutaneously as well as orally D LMW heparin has consistent bioavailability. 💡 Explanation LMW heparin is preferred over unfractionated heparin because: ✓ Correct Answer: D. LMW heparin has consistent bioavailability.