ALFA D 20ML DROPSAlfaD 20 mL drops (Alfacalcidol 2 mcg mL) its uses, benefits, side effects, and precautions: d What Is AlfaD Drops? Generic name: Alfacalcidol (a synthetic analog of Vitamin D), available as a 2 mcg mL oral solution in a 20 mL dropper bottle It's a prodrug converted in the liver into active Vitamin D (calcitriol), bypassing the need for kidney activation ideal for patients with kidney impairment Uses & Benefits Treats hypocalcemia (low blood calcium)