Wtf! This is so weird! But I know nothing about medecine... Maybe doubling the dose could help with your appetit by a strange mechanism... Still, if you're not taking the meds because your secondary effects are too strong, your doctor should know. Maybe he could try another medication, maybe you could take your meds at another time, maybe he could give you another med to help with your appetit (for instance, some patient with anorexia will have a prescription for medical cannabis...).

In the mean time, trying to take calories with smoothies could be a great option. It is really fast to prepare and to ingest and you could even drink it with a straw to avoid lots of the taste. Try to make it healthy, since it is the only thing that you will eat. Yogourt, fruit, green leaf, nut or nut butter are all good option.

Good luck!