How To Treat Discomfort In Knee After Having A Surgery?

how can i go about getting a diet pill such as fastin and a pain med such as a mild hydrocodone 5 mg.i have had surgery on my right knee and right shoulder it has pot out of place 3 or for times in the past 17 years it was doing ok for the past 7 years but it has had alot of trouble in the past 3 or 4 mths.i am now getting older an my knees have always given me trouble im now over weight about 40lbs.can i get these meds from someone online