I haven't tried it, but I heard some treat things about it from the ATA
newsletter which I copied below:

Here is the other link it points to ...

http://www.forbes.com/lifestyle/health/feeds/hscout/2005/09/22/hscout528120.html

These results rule!  The study was done in 2005, and I am surprised I am not
hearing more about this drug.  I would love to know more about this drug.

Anti-Alcoholism drug holds promise in quieting tinnitus - 9/26/05
For some people, drinking alcohol quiets tinnitus; others find that alcohol
makes tinnitus louder. But whether your glass is filled with water or filled
with wine, an anti-alcoholism drug holds promise in treating tinnitus.
Campral (acamprosate calcium), a drug used to help alcoholics stay dry, was
tested in a 50-patient tinnitus study by researchers in Brazil. Half of the
tinnitus patients received the drug; the other half received a placebo.
After three months, 83% of those who took the drug reported some degree of
tinnitus improvement, including 13% who said the tinnitus disappeared.
Weaknesses in the study, such as the small sample size, have U.S. experts
advising caution in accepting these results just yet. More studies are
needed to determine the drug's true effectiveness.

Campral did not help me at all.

John.