Maybe the hospital can help with more things other than just meds? I've been in that not eating and not interested in food at all struggle before. Actually it seems to be the first thing that starts happening when i am becoming severely depressed. the meds i'm on make me gain weight too. but maybe the meds could just be an aide to pick you up out of this tight hold that the depression has on you . This is usually not something i would suggest but maybe looking at it as if it were an antibiotic or something similar.. where it helps you to get better. but it's not a life long sentence to having to take it.
And there are also other alternate things that could help. but not commonly used (and i'm not sure if they are fda approved for those things). but i know a stimulant med can be placed along with an antidepressant to aide more, and also help with combating the weight gain from it.
I have had some times when i didn't need anything but the stimulant med which worked for my depression. however i do know that the pdocs like to watch the BMI when on these meds, because when i was only on it, i was loosing weight and the pdoc kept watching my bmi and if it were to drop below the weight i was suppose to be weighing then he would stop prescribing it.
I know that mood stabilizers can also aide in the antidepressants but i dont know much about that (never had personal experience in that area).