Whats the correct dosage for amoxicillin and how much a day for my 3 1/2 year old..weighing 37 pounds. she has strep.

Rx'd by physician?: Was the strep throat formally diagnosed by a physician? Strep should be diagnosed by a physician via a rapid test or culture, you don't want to treat with antibiotics for a viral pharyngitis. The physician would have prescribed the amoxicillin in the dosage that is correct. As a general rule, it is 40 mg/kg per day divided into 2-3 doses for a strep infection. Amount depends on concentration.