A prescription calls for the dispensing of 4% Pilocar solution with the direction of “ Gtt I OU TID”. How many mg of Pilocarpine HCL is being used per day ? Assume that the dropper is calibrated to deliver i20 drops to the ml

A prescription calls for the dispensing of 4% Pilocar solution with the direction of “ Gtt I OU TID”.

How many mg of Pilocarpine HCL is being used per day ? Assume that the dropper is calibrated to deliver i20 drops to the ml:

• a- 4mg
• b- 6mg
• c- 12mg
• d- 24mg
• e- 60mg.

The correct answer is c. 12mg.

Here's the breakdown:

- Pilocar solution strength:

4% Pilocar solution means that each 1 ml of solution contains 40mg of Pilocarpine HCL (4% of 1000mg).

- Dropper calibration:

20 drops per ml means that each drop delivers 2mg of Pilocarpine HCL (40mg / 20 drops).

- Dosage instruction:

"Gtt I OU TID" translates to "1 drop to each eye (Oculus Uterque), three times a day (Ter in Die)".

Therefore, the total daily dose is:

• 2 drops (1 drop per eye) x 3 doses = 6 drops
• 6 drops x 2mg/drop = 12mg

So, the patient receives a total of 12mg of Pilocarpine HCL per day.

Therefore, option c is the correct answer.