A composition match, not medical advice.
D3 Must Oral Drops 15ml contains Vitamin D3 (Cholecalciferol) 400IU, as a oral drop. It is made by Mankind Pharmaceuticals Ltd.
No, it is sold over the counter. Ask a doctor or pharmacist if you are unsure whether it suits you.
Yes. Cholecalciferol (Vitamin D3) Drops 400 IU per ml is a Jan Aushadhi medicine with the same salt, the same strength and the same form. On JanAushadhiOnline it costs ₹18.75 for 15 mls (₹1.3 / ml), against ₹2.8 / ml for D3 Must Oral Drops 15ml at its printed MRP — 55% less per ml. Ask your doctor before changing a brand.