I started taking this drug generic brand on 04/27/09 and today is 05/01/09. Luckily I work for oral surgeons, but I woke up with a very swollen and painful tongue and canker sore all in my mouth. I can't talk or eat or drink. I am soooooooooooooo miserable, this is one of the worst things I have ever had, I have severe migraines and I would rather have one of those instead of this. The swelling, throbbing and feeling like my mouth is on fire!!!!