I assumed you meant black market because you specified “from India”. There are several generic PrEP options available in the US from multiple countries (including India) that go through strict US regulations and are completely reasonable options. No one should order straight from India for personal use outside of a pharmacy or medical practice if it can be prevented.

This is a nice study on use of PrEP and overall effective coverage. As you can see, very few people developed HIV during this study, and most people were covered throughout their sexual activity, with more coverage among those taking daily PrEP.

https://onlinelibrary.wiley.com/doi/full/10.1002/jia2.25795

PrEP of either type can and should be considered for those who qualify, and one may be better than the other for individual reasons.