 It's sad that we've received that many. These medications have been so wildly successful that the drug makers can't keep up with demand. So says Rena Conti, a health economist at Boston University. They should have been prepared to meet demand as it shifted due to their very aggressive advertising campaigns. It's been hard to miss when you turn on the TV. Adults lost up to 14 pounds. They could help you lose up to 10 pounds.