DMPS and DMSA are chelating drugs. They pull mercury out of the body areas, tissue and blood etc. But they must be taken the right way.

You can get hold of DMSA online at http://www.vivagen.net/
This website is probably the best and cheapest to get DMSA. It is available in one of the lowest doses (25 mg), which is the dose you will want. That way you can split it in half if you want to taken an even lower dose.

But again, the link that I posted you earlier for the frequent dose website has all available information on there in the files and links section.

You can start chelating almost immediately. Just as long as it's been 4 days or so since you had your last amalgam out.