 [ 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 ] by having an x ray this is really the only way to know definitely if you have a fracture if you see a good podiatrist many have their own x ray machines and the expertise to determine if there may be a different non fracture reason for your pain