 [ Symptoms ] what is the general dose or type of antibiotic for a minor wound infection  i fell and scraped my knee on saturday and it gave me some road rash but nothing too bad i went to a clinic for a completely unrelated issue a sore roof of my mouth and some little sores and mentioned the knee as an afterthought they prescribed 500 mg 2xday of cephalexin even though it appears only very slightly infected i am very hesitant to take this amount especially since i just got off a round of antibiotics for a wisdom tooth is this amount normal [ Disease ] the dosage you describe 500mg twice a day of cephalexin keflex is a usual dosage for this drug cephalexin is often prescribed for soft tissue infections such as either the roof of the mouth or the superficial wounds of the knee it is a very effective antibiotic for these purposes wishing you well