While many pharmaceutical drugs are available in India, you may prefer to bring the items you’re used to. Other miscellaneous items that are most likely best to bring from home include your preferred brands of contact lens solution, dental floss, shampoo/conditioner, feminine hygiene products, makeup, underwear, supplements and energy bars… etc!
Body lotions and sunscreens that don’t contain skin-bleaching formula are sometimes difficult to find. Pale skin is highly coveted in India and most Asian countries, so many skin care products contain some form of “whitening”. This may or may not be what you want!
Clothing and other gear made from 100% cotton or wool is sometimes pricey and/or difficult to find. Much of the clothing available in tourist areas is made of rayon or polyester or other synthetics, which isn’t so comfortable in hot weather and not warm enough in cold weather.
Quality sunglasses and shoes that aren’t knock offs can be hard to find. Also, I’ve found that almost always, electronics such as camera or computer equipment is both hard to find and way more expensive than in the US.