Nothing, though I have developed some muscle tics, and there's this rash...

Seriously, MSMA is controversial stuff (and I thought it was being phased out?), but I think mostly because of the arsenic that ends up in the drinking water.

Certainly take whatever precautions make you comfortable, and I'm sure the label advice is the best advice. FWIW, whenever I spray anything I wear long pants and shoes that can be hosed off outside. I should also wear gloves, but frankly I don't - I just rinse my hands and arms really well while hosing down the shoes, and then the pants go in the wash.

if they could, they would put warning labels on water.

use common sense with it and you will be fine. you don't have to wear a mask, but if you do all you need is a painter's mask and some glasses. wash your hands and any exposed skin when done.

some people do get rashes from jsut about any chemical, if you are one of them you will need to make sure you wear longs sleeves/pants/gloves.

The warnings are for idiots who have to be protected from themselves who don't know any better than to not drink, inhale, or spray it on themselves and then sue the manufacture when they fail to use common sense.

If you are not affraid to pump gas in your car and know better than to drink, inhale, or pour it on yourself, then there is nothing to be affraid of.

The warnings are for idiots who have to be protected from themselves who don't know any better than to not drink, inhale, or spray it on themselves and then sue the manufacture when they fail to use common sense.

I've actually thought that they are intentionally practically impossible to abide by so that when someone shows up with a lawyer and some vague symptoms, the company can point to the label and demand to see the gas mask.

"Hey, we warned you."

if they could, they would put warning labels on water.

They're working on it:

http://www.dhmo.org/

O.K., that's a parody, but still...

Here is a link that might be useful: H20 aka dhmo

Well, I kind of wondered if it was a hind end-covering manufacturer's maneuver to avoid lawsuits, but on the other hand, I was saying to myself "it does contain arsenic after all."

Good to hear you all have used it and lived to tell the tale. Thanks all, for the common sense (and funny) answers.