headache
"Was prescribed this for tension headaches.  It does something, but it makes me dizzy and light headed.  It seems to start working nearly immediately (reduces the pain by like 50-75%), but after not too long the headache will start slowly creeping back over the course of the next few hours.   I actually have a headache I've been attempting to treat with it right now and so far I've taken 7 pills over the course of 26 hours and it's still here."