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 Dosage required: 10–30 mg/kg/day q6–8 h.

 How supplied: 75, 150, 300 mg capsules.

Table 3.15 Calculating the dose of clindamycin capsules in mg for a 10‐year‐old child weighing 70 lb

Step 1 Convert pounds to kg:	70 lb × 1 kg/2.2 lb = 31.8 kg
Step 2 Calculate the dose in mg:	31.8 kg × 10 mg/kg/day = 318 mg/day
Step 3 Divide the dose by the frequency:	318 mg/day ÷ 4 (qid) = 80 mg/dose q6h

The dose is 80 mg; either 75 mg capsules can be prescribed and increase the number of days of therapy, or it may be best to use the oral suspension.