Question

Order phenobarbital 30 mg. available: phenobarbital gr 1/4. dose to be given: _____

Answer 1

`30\,mg*(1\,gr)/(64.79891\,mg)*(1\,tab)/((1)/(4)\,gr)=(30\cdot 4)/(64.79891)\,tab\approx1.852\,tab`

The dose to be given is about 1.85 of the 1/4 grain tablets.