I’ve used Navage and it honestly helps whenever I have a horrible sinus infection and the constant post-nasal drip wrecks havoc, affecting my quality of sleep the most (also recommend salt water gargles for sore throat).
I have Tinnitus, which I first noticed when I was sick one time as a kid - probably 5-8 yrs old. Thankfully I have no other adverse experiences to report (related to this).