I dont know that much about DMSA (I might look into it myself actually) ...

ALA might help more then DMSA; and it could take a long time to remove symtpoms from what I hear.

If you are sure that the symptoms are from mercury poisoning dont give up.

I spent 12+ years trying to figure out what caused my symptoms (and honestly I'm still not sure if its mercury or what); but it's the only thing I have to go on so here I am ...

you asked about doses of ALA ... what people usually suggest is to start out real low (some people can react to even very small doses ie 25 mg) - and others can take 200 right away.

I think Dr. Cutler has a proceedure for using DMSA and ALA at the same time. Just be careful with how much chelating agents you use.