I am participating in a study, but it's with Levofloxin inhaled compared to TOBI to treat Pseudomonis. There are no placebos in the study I am in. You either get Levofloxin or TOBI...I got TOBI. I have been on/off TOBI for years already, so no biggie, but this time, I have a rash all over my chest and back since I started back on the TOBI. Has this ever happened to anyone else??