Here is a Los Angeles Times article from 1995. It alone doesn't prove he did or didn't, but it was brought up by the prosecution: THE O.J. SIMPSON MURDER TRIAL : Prosecutors Say Simpson Trick Thwarted Glove Test June 23, 1995 The Los Angeles Times JIM NEWTON and HENRY WEINSTEIN and ANDREA FORD | TIMES STAFF WRITERS http://articles.latimes.com/1995-06-23/news/mn-16337_1_o-j-simpson-murder-trial Prosecutors accused O.J. Simpson of intentionally not taking his anti-inflammation medication in order to confound a glove demonstration and deceive the jury in his murder trial, according to transcripts released Thursday. "Mr. Simpson has arthritis and we looked at the medication that he takes and some of it is anti-inflammatory," Deputy Dist. Atty. Christopher A. Darden said during a sidebar conference Wednesday, according to the transcript. "And we are told that he has not taken the stuff for a day, and it caused swelling in the joints and inflammation in his hands." Simpson's attorney, Johnnie L. Cochran Jr., responded by accusing prosecutors of "being paranoid" but did not directly deny the charge. According to Dr. Ernest Brahn, a UCLA rheumatologist, medications of the kind used by sufferers of rheumatoid arthritis do cause swelling to subside. But halting the medication, he added, probably would not cause the swelling to return overnight. "The kind of joint deformities that we see in rheumatoid arthritis can impact on whether a glove might fit," Brahn said. "But many of the drugs that we administer take weeks or months to achieve their anti-inflammatory effect."