A composition match, not medical advice.
Zecal Tablet 10 Tablet contains Elemental Calcium (Calcium Citrate) 500mg + Vitamin D3 (Cholecalciferol) 250IU, as a tablet. It is made by Alkem Laboratories Ltd.
No, it is sold over the counter. Ask a doctor or pharmacist if you are unsure whether it suits you.
Yes. Calcium 500mg and Vitamin D3 250IU Tablets IP is a Jan Aushadhi medicine with the same salt, the same strength and the same form. On JanAushadhiOnline it costs ₹7.94 for 10 tablets (₹0.8 / tablet), against ₹11.6 / tablet for Zecal Tablet 10 Tablet at its printed MRP — 93% less per tablet. Ask your doctor before changing a brand.