I just got a sinus infection that I believe was caused by my Zoloft, which on one site I read that these meds can cause upper respiratory problems, sinusitis, etc. I've been on an extremely stron antibiotic for nearly a week now and no relief yet. I would bet that if zoloft can cause it, that Ativan can
I do not know if Ativan is a direct cause of your sinus infection, but I do know after prolonged use of Ativan or any benzo med, these medications can supress the central nervous system, immune system, etc.... making it more difficult for our bodies to fight off infections, etc.... because of thier tranquilizing effect on our system.
So anyone taking these medications would take a longer time to heal from illness then someone that was not. I obtained my information from a book written by Dr. Bourne.