I do the same thing with 90% vodka. It doesn't really matter how much vodka you use just enough to keep the weed covered. I drank about 2 shots a couple days ago.Its a different high than smoking. I've heard reports where it takes about an hour to an hour and a half to hit but mine hit after about 10 minutes. I drink a ton of vodka so the vodka didn't have much effect on me.