Historically, 400 IU (10 ug) of vitamin D was recommended for better health because it closely approximated the amount of vitamin D in a teaspoonful of cod liver oil. However, 800 to 1,000 IU is ...

In one study, seven patients (26%) presenting with foot drop had had recent IM injections in the buttock. An additional 20 patients (74%) presented much later (Fatunde & Familusi, 2001).