It's 1 pill per day. It is stashable but you have to do a quest to be able to do that daily quest. Also, to do the quest, you need to go to EU. I doubt anyone is going to spend time making alts on the same account, finishing the EU chain and then find a squad just to get 5 minutes in stealth which can be broken using Revelation Potion.
If you're just complaining about it because you don't know how to get it, I can finish the guide I started writing and post it.
