Читать книгу The Dentist's Drug and Prescription Guide - Mea A. Weinberg - Страница 25
3.2.4 Azithromycin 3.2.4.1 Oral Suspension (Table 3.12)
ОглавлениеDose required: 10 mg/kg/day q24h × 3 days.
How supplied: oral suspension comes in concentrations of 100 mg/5 mL, 200 mg/5 mL, 1 g powder packet.
1 Q. When should the 100 mg/5 mL suspension be prescribed?
2 A. The 100 mg/5 mL strength is prescribed for younger children weighing less than 44 lb (20 kg). Table 3.12 Calculating the dose of azithromycin oral suspension in mL for a 10‐year‐old child weighing 70 lb and how the prescription should be writtenStep 1 Convert pounds to kg:70 lb × 1 kg/2.2 lb = 31.8 kgStep 2 Calculate the dose in mg:31.8 kg × 10 mg/kg/day = 318 mg/dayStep 3 Divide the dose by the frequency:318 mg/day once a day = 318 mg/doseStep 4 Convert the mg dose to mL:318 mg/dose ÷ 200 mg/5 mL = 7.9 mL q24h Rx: azithromycin oral suspension 200 mg/5 mLDisp: 1 bottle (100 mL)Sig: Take 7.9 mL orally once a day for 3 days for dental infectionTable 3.13 Calculating the dose of azithromycin tablets in mg for a 10‐year‐old child weighing 70 lbStep 1 Convert pounds to kg:70 lb × 1 kg/2.2 lb = 31.8 kgStep 2 Calculate the dose in mg:31.8 kg × 10 mg/kg/day = 318 mg/dayStep 3 Divide the dose by the frequency:318 mg/day once a day = 318 mg/dose once a dayThe strengths of tablets are 250, 500, or 600 mg. Since the dose is 318 mg once a day, it is probably more precise to prescribe the oral suspension.Table 3.14 Calculating the dose of clindamycin oral solution in mL for a 10‐year‐old child weighing 70 lb and how the prescription should be writtenStep 1 Convert pounds to kg:70 lb × 1 kg/2.2 lb = 31.8 kgStep 2 Calculate the dose in mg:31.8 kg × 10 mg/kg/day = 318 mg/dayStep 3 Divide the dose by the frequency:318 mg/day ÷ 3 (tid) = 106 mg/dose q8hStep 4 Convert the mg dose to mL:106 mg/dose ÷ 75 mg/5 mL = 7 mL tidStep 5 Convert mL into teaspoonfulsa7 mL ÷ 5 mL = 1.4 teaspoonful Rx: Clindamycin oral solution 75 mg/5 mLDisp: 1 bottleSig: Take 1.4 teaspoonful orally three times a day for 7 days for dental infectiona Each teaspoonful is 5 mL.
