Can you get a 90 day e-visa? I thought the maximum e-visa was 60 days?
Advice seems to be to bring a copy of your doctors prescription with you for any personal prescribed medications.
As an old guy, I carry lots of different pills, but no one expressed any interest in them or me. I did carry my UK prescription just in case.
Some medications may not be allowed in under any circumstances, maybe opiate type pain killers, etc.
One can buy many medicines in India, but I have no information on specialist items.
I understand your question about being denied entry because of being on such medication, but I doubt that would be a factor, they do allow folk in for medical reasons anyway...
Please comment on the visa issue?