Question: how much amoxicillin for a 20 lb baby?
Answer: The usual dose is 20 to 40 milligrams (mg) per kilogram (kg) of body weight per day, divided and given every 8 hours, or 25 to 45 mg per kg of body weight per day, divided and given every 12 hours. Infants 3 months of age and younger—Dose is based on body weight and must be determined by your doctor.