It definitely has some. When I first started it I was loading it up, then one night I had 3 beers with some buddies and felt like I was wasted and near started spinning and had to go pass out. I woke up with a pretty bad hang over too. Now I apply much less, but sometimes can "feel it" say 30 mins to 2 hours after absorption in ways like metallic taste on the tongue and more frequent urination, but nothing else other than that.