Final answer:
To fulfill a prescription of 0.3 g Quinidine sulfate bid, a patient should take 2 tablets of 150mg each per dose, totaling 4 tablets per day.
Step-by-step explanation:
The student asks how many 150mg tablets of Quinidine sulfate should be given if the prescription is for 0.3 g bid (twice a day) when taken orally for a patient with arrhythmia. To solve this, we should understand that 0.3 g is equivalent to 300 mg, so we need to find how many 150 mg tablets would add up to 300 mg.
Dividing the required dose (300 mg) by the strength of each tablet (150 mg) gives:
300 mg / 150 mg per tablet = 2 tablets per dose. Since it's prescribed bid (twice a day), the patient will take 2 tablets in the morning and 2 tablets in the evening, totaling 4 tablets per day.