My daughter was prescribed amoxicillin 400ml/5ml 12ml/twice daily for an ear infection. She weighs 47 lbs, is this a lot for her weight?

May be. If the medicine says 400 mg/5ml, you may want to call and check with your daughter's doctor or pharmacist to confirm the amount she is supposed to take. Hope she feels better soon!
CORRECT DOSE. Recommended dose of Amoxicilln for Otitis Media in children is based on body weight and it is 80mgm/kgm for ten days Total dose is divided and given two to three times a day Your daughter is getting 40 mgm/kgm so she is getting at 40mgm/kgm and it is not too much for her weight.