My GF had really bad headaches so she has a stash of imitrex. I have a really PITA headache that is killing my studying, so she gave me one, but I don't know how strong they are. Are they going to put me to sleep or make me unable to study? She says they make her 'a bit woosy' but she's like 5'4" and 110 and I'm 5'10' and 175. But she's been takin them for years now....