PTCE Compounding 4

Question 1

The term 'tonicity' in compounded ophthalmic solutions refers to:

Accepted Answer

Osmotic pressure relative to blood or tears

Answer

Tonicity describes the osmotic pressure of a solution compared to body fluids; ophthalmic preparations should be isotonic (~0.9% NaCl equivalent).

Question 2

Which of the following is an example of a compounded preparation that requires protection from light during storage?

Accepted Answer

Nitroglycerin transdermal gel

Answer

Nitroglycerin is photosensitive and must be stored in amber containers to prevent degradation.

Question 3

When calculating the amount of active drug needed for a compounded preparation, a technician uses the formula: quantity = (strength desired × volume desired) / stock strength. This is an application of which concept?

Accepted Answer

Dilution equation (C1V1 = C2V2)

Answer

C1V1 = C2V2 is the dilution equation used to calculate how much stock solution is needed to prepare a desired concentration and volume.

Question 4

A pharmacy must comply with USP <800> when handling which category of compounding ingredients?

Accepted Answer

Hazardous drugs (HDs)

Answer

USP <800> specifically governs safe handling, storage, and compounding of hazardous drugs to protect personnel and the environment.

Question 5

Which equipment is used to measure small volumes of liquid (< 1 mL) accurately in a compounding pharmacy?

Accepted Answer

Calibrated oral syringe or micropipette

Answer

Calibrated oral syringes and micropipettes provide the accuracy needed for measuring very small liquid volumes.

(PTCE) Pharmacy Technician Certification Exam Practice Test

(PTCE) Pharmacy Technician Certification Exam Practice Test

PTCE Compounding 4