the health problems came a sales tailspin. today, perhaps the death knell for the once most popular diet drug on the market. public citizen, the consumer advocacy group petitions the fda to ban it from the pharmacy. saying it identified rare cases of hepatitis, 47 patients with pancreatitis. and 73 cases of kidney stones. it s pretty clear this drug causes these diseases. and it notches it up enormously in terms of how risky it is. reporter: glaxosmithkline told abc news there is no proof of a direct link, and insists that safety has been established through 100 clinical studies involving more than 30,000 patients. even so and what may be the final straw just hours after the call to ban the drug, glaxosmithkline decided to sell the brand. that once had so much promise and now may join the long list of disappointing and now off the market magic diet pills.