Ontario Registered Pharmacy Technician (RphT) Practice Exam

Select the appropriate sig for the following Rx: -Take 2 tablets by mouth every 4 to 6 hours as needed

1. 2 tabs q4-6h prn

2. 2 tabs po q4-6h prn

3. 2 tabs po q4-6h

4. None of the above

The correct answer is: 2 tabs po q4-6h prn

Option A is incorrect because it does not specify the route of administration (PO), which stands for by mouth. Without this information, the patient may take the tablets in an incorrect way. Option C is incorrect because it does not mention the "as needed" aspect of the prescription, which is an important part of the dosing regimen. Simply taking the tablets every 4-6 hours may result in the patient taking unnecessary doses. Option D is incorrect because it does not provide any dosing instructions at all. Without these instructions, the patient may take the tablets in an incorrect way or may not know when to take them. Option B is the correct answer because it specifies the route of administration (PO) and includes the "as needed" aspect of the prescription. This instruction ensures that the patient takes the medication correctly and only when necessary.