Hi ..Marie here...I ad some dental work 3 weeks ago and since then had a bad abscess, that busted on my gums above the procedure. I have been on Tylenol 3 and Perostat since, when back to dentist for another procedure and was told, I have a really bad infection that set in...my whole side of face from chin to temple is throbbing with bad pain...was prescribed Keflex 500 mg 4 times a day for 7 days, 28 tabs...does that seem like a lot ...I do have to be pre-med 2000 mg amoxill, an hour before procedure...what do you think..