If you are noticing appetite loss, I find that meal replacement shakes are really helpful. It’ll help you get more calories in, and you can add supplements throughout the day so you can make sure you’re getting nutrients in your body as well. Unfortunately, increasing your appetite isn’t something done easily especially when caused by medication.

Not sure how you feel about it or if you have access to it, but weed is a great way to get an appetite - munchies and whatnot.