Question

A prescription is written for prednisolone 1% ophthalmic suspension. 10 mL ii gtts ou q.d. What is the days' supply for this prescription? 30 20 25 50

Answer 1

Ans) The doctor has prescribed prednisolone 1% ophthalmic suspension.
The total quantity to be dispensed is 10 mL as stated by the doctor.
The sig says: instill two drops into each eye four times daily
In other words, the patient will use 2 drops * 2 eyes * 4 daily, that is, the patient will use 16 drops daily.
Now, we need to calculate the total days supply.
Assume 1 mL = 20 drops and, in turn, 10 mL = 200 drops
Then, the total days supply will be 200 drops divided by 16 drops which is 12.5 days.
It is worth noting that some pharmacists may assume 1 mL = 15 drops

So, it depends on the drops/ml.