Medication W is available in 250 mg enteric coated tablets. A patient has been ordered 800 mg/day. The nurse is to administer a dosage of one tablet every 5 hours. • How many tablets will this patient need per day? • the first dose is administered at 4am, when will the last dose by administered?

The last dose will be administered at 7 pm

Step-by-step explanation:

This problem can be solved by direct rule of three.

The problem states that each tablet has 250mg of medication, and that every 5 hours, a tablet is administered.

So, we need to find how many doses are needed to reach 800mg of medication

1 dose - 250mg

x doses - 800mg

x = 3.2 doses.

Decimal doses cannot be administed, so there will be four doses being administed, with one of the being smaller.

The doses are administed in intervals of 15 hours. After the first dose, there will be 3 doses remaining. So it will take 3*5 = 15 hours to administer 3 doses

So, if the first dose is administed at 4am, the last is going to be administed at 4h+15h = 19h = 7P. M.