First of all, I send my support and best wishes to Ferguson. Us Turks have faced a different yet so similar version of Police brutality last summer. I noticed that there’s a heavy use of tear-gas in Ferguson so I wanted to share the “anti-tear gas potion” that we used last summer.
You need water sprayer, and mix stomach acid-balancing liquid (like Talcid, Gaviscon, Rennie) with water. You can also use regular kitchen sodium bicarbonate instead of medicine. The ratio is a small bottle of Talcid mixed with 500cl water. 1:2. (sorry I suck at math)
When subjected to tear-gas, just spray the mixture on your eyes and other areas that are burning. Don’t forget to keep your eyes shut. Also it helps if you gargle it to ease the burning feeling and throat pain. Don’t swallow it, just gargle and spit.
It won’t take pain away instantly, but it’ll ease it considerably.
Other than that, try to wear long-sleeve shirts to keep your skin from tear gas. Last year, police ran out of regular tear gas and started using a more chemical induced liquid that caused burns on the skin.
Just remember, drinking or pouring water on burning areas won’t help. Only make it worst.
If you don’t have the medicinal mix or carbonate, yoghurt works like a miracle. Also lemon juice slightly ease it too.
(and pardon my english)