Sathi, Use "Fitkiri" (this is what we used to call in Nepal). Here, it is called Alum. You can find it in any Indian grocery store in the soap/sampoo section. Most herbal stores also have it. I used to use a bunch of deodorants earlier. Now, there's  no need for me to. Being totally natural, I do not think it will cause any side-effects also. I know back home people use it as an after-shave also.