Maaaaaaggggiiieeeee... what you were thinking, hun?
Tylenol is more of a fever reducer. If you want to get rid of a headache in a surer way, try taking one Aleve. It's stronger than tylenol and advil. HOWEVER, since it's stronger, you have to take less. They recommend on the little label no more than 2 in an 8-12 hour period.
Gah. All these stories about wisdom teeth being pulled are not helping me. I'm supposed to get them pulled over spring break, and I really don't want to spend spring break with too much pain medication in me... especially since the original plans were for me to go to Paris (which obviously isn't happening anymore).
As for overdosing on pain meds... When I was in HS, I'd be dumb and take 12-15 little advils or a bunch of over the counter sleeping pills or nyquil or anything I could get my hands on. I knew I wasn't taking enough to kill me, so I don't know why I did it. But then last spring, I took 6 or 7 (I lost count) Vicodin pills and I spent 2 days unable to move in bed, lost 10 lbs from lack of eating and a lot of heaving, and spent the next two weeks basically recovering. I don't recommend it.