I use a Marsona Sound Conditioner. I purchased it new for about $140 about 10 years ago. Apparently, there are less expensive machines, according to the info here.

I found it in a speciality catalog -- don't remember which one. I've seen similar items in the Sharper Image catalog. And of course, there's the ever popular Ebay.

The benefit of neurontin is that it is flushed out of the system without being processed by the liver, which related to another physical risk factor for me.