info on xenical..............
http://www.drugs.com/xenical.html
basically it blocks fat from being absorbed.....which means any and all fat you eat gets pooped out almost immediately......get ready for some seriously abnormal stools and gas.....close proximity to a bathroom is a requirement...
here is the side effects part from above:
http://www.drugs.com/sfx/xenical-side-effects.html
I know folks who tried it and lasted maybe two weeks before they stopped taking it......because of the gastrointestinal problems.
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Safeway grocery stores sell stevia.....there are a couple of different brand names....so does Trader Joe's and Whole Foods...it should be in most big chain grocery stores where you find sugar.