Your brother should should try wearing some earplugs to bed if he is so sensitive to sound. Its the only way I could get sleep for many years, as I was extremely sensitive to sound. I could not fall asleep if there were any noises whatsoever...but with earplugs, GABA, and melatonin I could fall asleep and get much needed rest.

Doctors generally don't help people with mercury poisoning, even natural oriented doctors...and in many cases they make them worse. You should consider getting the book 'Amalgam Illness' by Andrew Cutler, it is full of valuable information. There is really too much contradictory information on the internet about mercury detox, so be very careful, as your brother can't afford to get worse.