11. The uricosuric agent probenecid proved to be suitable. 12. Some doctors say that co-administration of Tamiflu with probenecid could double supplies. 13. Probenecid did not affect channels formed by connexins.14. Probenecid is banned by the IRB because it is often used to mask steroid use.15. Like other ?-lactam antibiotics, renal excretion of cefalexin is delayed by probenecid . 16. But the IRB outlaws probenecid because it can be used as a masking agent for steroids. 17. One popular masking agent is the diuretic Probenecid , which is legitimately used to treat gout. 18. Tune and his doctor said they did not know that probenecid was banned by the IRB. 19. In 1987 Sagedal was found guilty of probenecid doping together with four other Norwegian shot putters. 20. Probenecid also facilitates uric acid secretion.