My body does this weird thing with many meds. Medication becomes ineffective very quickly, I think much faster than in a normal person. Example: a couple years ago at the dentist he tried a different anesthetic so as to not interact with a med I was on. He would inject it into my gum and it would work for a minute, and then it would be like he was working on me with no anesthetic at all. The dentist couldn't figure out what was going on-- he kept giving me shots, over and over, and my body just adapted within a minute or two. He finally got frustrated, said there was no possible way that I was just tolerating this much drug, and told me to come back when I was off the med. Another example would be the Vicodin I take. You're supposed to take it every 4-6 hours. However, it only controls my pain for about an hour and a half. This happened from the first time I took it-- my body hasn't just slowly become tolerant. Most meds, if they have any effect on me at all, will only have an effect the first couple times I take them, if that. I don't have a super fast metabolism. As far as I can tell. The strangest part is that I'm super sensitive to some stuff. I have to take far less than the reccomended dose. Sorry this is so long! I'm just wondering if anyone else has this happen to them, or if it's yet another quirk in my system.