Sulfasalazine as a preventative against Pneumocystis (PJP). 594 RA pts & 848 Rx episodes - 181 on SSZ, 667 controls. W/ 850 Pt-Yrs F/U, 21developed PCP, 3 died of PCP. SSZ significantly lowered PJP risk (p = 0.003, rate ratio = 0.05; 95% CI 0.00–0.34). https://t.co/PAgBaJGldR https://t.co/VV3MvVEGal