theodp writes: "The obesity epidemic has spread to man's best friend, prompting the FDA to step in and approve the first prescription doggie diet drug. Pfizer's Slentrol suppresses Fido's appetite while also blocking the absorption of fat from his treats. Anticipating future Darwin Award winners, Slentrol's label warns that humans who dip into their pooch's stash to lose a pound or two are in for some abdominal distention and pain, diarrhea, flatulence, headache, nausea and vomiting. Pfizer's efforts (PDF) also earned the drug giant US Patent No. 6,720,351. What's next? A Medicare Prescription Drug Benefit for Dogs?"