No, I haven't tried it and probably won't. It is toxic. It has been used for hundreds of years to treat various diseases. Until recently it was the go to med to treat heart worm in dogs.
We get a small amount of arsenic daily in our food and water. Rice grown in US has Arsenic because the growers use it to kill the natural hook worms in the grain. Google "arsenic in rice" and you can read the whole story.
The problem with using Arsenic as I understand it is that you have to take enough to take you to the edge of death in order to kill the parasites. AND the arsenic leaves permanent residual damage.