That seems very dangerous, and extremely bad public health policy. There are major concerns with anti-biotic resistant bacteria. I came across an article from 2017 suggesting the government clamped down on this. Is it still the case that anti-biotics can be purchased without prescription?
https://www.outsourcing-pharma.com/Article/2017/01/16/Indian...
Also, I'm confused, I can easily buy over the counter Vitamin D supplements in the US. Is the dosage of those not large enough?