The issue with amphetamine/(insert indirect sympathomimetic stimulant here) is that the weight will probably go back on if you stop taking it. I was on Adderall XR for 4 months and lost 25 pounds while on it (this was weight I could ill afford to lose). I immediately gained it back within 1.5 weeks as soon as I discontinued the drug; I was so ecstatic at having an appetite again that I ate everything in site.
The truth is that is it is better to work to develop a taste for healthy foods and to add in a bit of exercise (running is great, but even a 30 minute walk a day can do wonders). Look for foods with higher levels of fiber, as this will swell in the stomach to promote feelings of fullness.
Try some of these suggestions:
-Replace snacks with a piece of fruit. The fiber in say, an apple, combined with its water content, makes it a filling snack and it nutritious on top of that.
-Eat salad before a meal (I recommend spinach with olive oil and a nice vinegar); again, this is somewhat filling and is also pull of nutrients.
-Add brown rice and beans to your diet. A combination of beans and brown rice can be cooked very easily, are very inexpensive, and provide a reasonable number of calories along with protein, fiber, and some carbohydrate calories. Their only downside is some blandness, but you can also season the hell out of them to your taste. Along with some vegetables, this can make a filling, nutritious lunch.
-Stick to lean meats and fish instead of red/fatty meats.