I have been taking Flonase for about 5 weeks for spring allergies. During this period, I have developed tinnitus, which appears to be coming from both ears. It started suddenly as a hissing sound, is constant in amplitude, and continuous. Could this ringing be a coincidence, or is it a medically known potential side effect of the Flonase? I am 69 years old; the audiologist I just saw about the tinnitus says my ears/hearing are relatively healthy, though I have some high-frequency hearing loss.