I took the asthma drug "singulair" for about 1 month and started having joint (muscular)pain and rash. I have been on 2 rounds of prednisone....each time the pain returns. Does any of this sound like Churg/Strauss syndrome (package insert for singulair mentions a remote chance of this type of reaction). Has anyone had this type of reaction from Singulair? Dr. is currently testing me for lupus (ANA), but says she's doubtful that this is the problem. Please email if you have had similar problems. Thanks!