Hello all! I'm 20 yr old CFer (soon to be 21<img src="i/expressions/face-icon-small-happy.gif" border="0">.) I am on tobramycin often, so I occasionally have my hearing checked. The last few times I was on Tobra, my kidneys were having trouble clearing it from my system. Anyhow, when I got my hearing tested, the results said that I had moderate-severe hearing loss in my right ear at high frequencies. Fortunately, this is not in the range of speech, but it is very close to it. Has anyone else had problems like this? Mary