The quantity of tablet that is needed for the entire prescription are = 15 tablets
Calculation of dosage of drug
The desired dosage (D)= 400mg
The on hand dose (H) = 800mg/tab
The amount needed to be administered (A) = 400/800
= 0.5mg/tab
The quantity of tablet that would be given for 3 times daily for 10 days= 0.5 × 3×10
= 15 tablets
Therefore, the quantity of tablet that is needed for the entire prescription are = 15 tablets
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