I think its very possible. I've talked to people who have experienced headaches trying to cut back on coffee and/Mountain Dew. I also think that some of the OTC medications aren't necessarily as harmless as we think. I also believe the current craze of energy drinks also has the potential to end badly. So many young people are slamming these things like water, and they are loaded with sugar and caffeine. I dunno, just my 2 cents.