I know of no guidelines in UK/USA/Australia&Newzealand, which allows prescription of stimulants for Depression
for their anorectic/weight loss
effect. Hence there is no way any doctor can prescribe you Adderal in these regions. In other parts of the world as well, it would NOT be considered to prescribe Adderal for weight loss.
Beleive me, the weight gain from other medication can be controlled in many other ways and a discussion first with a lifestyle team/dietitian in your area should be your first port of call.If not please discuss this with the treating psychiatrist/GP so that they can find some other ways to help, including medication.
Hope this helps.