The maximum dosage in mg is – 74 Kg x 40 mg/kg = 2960 mg dosage of Erythromycin.

b) Mrs Smith is prescribed Ibuprofen 5mg/kg/dose and her body weight is 80 kg.

The maximum dosage of Ibuprofen that can be administered to Mrs Smith is – The maximum dosage of Ibuprofen that can be administered to Mrs Smith is – 5mg/kg x 80 kg = 400 mg of Ibuprofen