Question: what is the difference between low molecular weight heparin and unfractionated heparin?
Answer: Differences from unfractionated heparin Differences from heparin (i.e. "unfractionated heparin") include: Average molecular weight: heparin is about 15 kDa and LMWH is about 4.5 kDa. Less frequent subcutaneous dosing than for heparin for postoperative prophylaxis of venous thromboembolism.