I wouldn't worry. You may already be getting Taurine in your diet somehow, not even being aware of it. It's very likely Taurine won't do anything at all one way or the other for you. Some here report taking relatively high dosages with no benefit to their tinnitus. But, there's a post here by a woman who swears a low Glutamate diet has helped her along with taking Taurine. Her post is what encouraged me to try Taurine after I had already written it off as bogus. So far she's been right. Taurine has helped me.
It's tough for me to say how immediate the effects are. My tinnitus fluctuates dramatically from day to day. On average though, the good days have become more frequent and the bad days aren't quite as bad. The feeling of pressure in my ears has reduced quite a bit. I have no plans to stop. I'll probably play with the dosage. I'm thinking lately I may try taking an even higher dose for a little bit. I've had zero side effects from it.