after loosing 8kg through diet and movement earlier this year I was also put on meds that increase appetite. I generally eat very healthily.
Did my absolute best not to gorge, but there was no way I could stop it - and my will power is pretty good. Gained 5-6 kg in 6 weeks. If your experience is anything like mine, no matter what dietary advice you are given, it won't help.
The only solution was to change meds. Within literally 3 weeks, 4 max, those extra kilos had gone. No effort needed.
You need to know up front if weight gain is a common problem, and ask if there -are- ways to combat it. Or if there are other meds available.
Your pharmacist may just be able to help in letting you know what meds have what side effects so you can go back to your doctor pre-armed. Doctors are generalists at disease detection, handling and cure. Pharmacists study the effects of medical drugs on the body in more depth (though they cannot diagnose iirc and can't prescribe)
In the end I insisted the doctor tell me exactly what meds there were (and I'd done my google-research so I knew roughly what the possibilities were); then went through them all, asked the side effects and worked out one with him that we thought might be able to control the problem. Lot happier now; even though this med is not as effective, the overall benefit/drawback balance is better for me.