Good, that makes it less likely that medications caused your tinnitus. However, it's still a good idea to check with your doctor because other medications can sometimes cause tinnitus. If a medication may be causing your tinnitus, your doctor could suggest stopping it or switching to another medication to see if your tinnitus improves.
Okay, just one more question:
Do you have a family history of hearing loss in young adulthood? For example, did any close relative lose his or her hearing without a clear cause before the age of 40?