I believe that US rules would allow him to carry medically required supplies on the flight. I don't know if the outbound Indian airport would feel the same. I think you need to coordinate that very carefully.
When I was on PD, I would have my bags shipped ahead, but I would also put a few in carry-on to buy me some time if the shipment were delayed in getting to my hotel. I always had a MDs letter stating they were medically necessary and never had a trouble taking them on board US originating flights despite the fluid ban.