Saudi Prometric Pharmacist Pharmaceutical Sciences

Question 1

What is bioavailability and why is it important in pharmacy practice?

Accepted Answer

The fraction of administered drug that reaches systemic circulation in unchanged form, affecting therapeutic efficacy

Answer

The total amount of drug manufactured

Answer

The shelf life of a medication

Answer

The number of dosage forms available

Question 2

What is the difference between a generic drug and a branded drug?

Accepted Answer

Generic drugs contain the same active ingredient, dose, and dosage form but may differ in inactive ingredients, and must demonstrate bioequivalence

Answer

Generic drugs are less effective

Answer

Generic drugs have different active ingredients

Answer

There is no regulatory requirement for generic drugs

Question 3

What is the purpose of stability testing in pharmaceutical manufacturing?

Accepted Answer

To determine how a drug product maintains its quality, safety, and efficacy over time under specified storage conditions

Answer

To determine the drug's taste

Answer

To test the packaging design only

Answer

To measure drug solubility only

Question 4

What is the first-pass effect and how does it influence oral drug therapy?

Accepted Answer

The initial metabolism of orally administered drugs by the liver before reaching systemic circulation, reducing bioavailability

Answer

The drug works faster on first administration

Answer

Only the first dose of a drug has any effect

Answer

The drug passes through the body without being absorbed

Question 5

What is the therapeutic index and why is it clinically significant?

Accepted Answer

The ratio of toxic dose to therapeutic dose (TD50/ED50), indicating the drug's safety margin

Answer

The number of therapeutic uses for a drug

Answer

The speed at which a drug works

Answer

The cost-effectiveness of a drug

Question 6

How does Saudi Arabia's climate affect drug storage and stability?

Accepted Answer

Extreme heat (40-50°C) can accelerate drug degradation, requiring strict cold chain management and proper storage conditions

Answer

Climate has no effect on medications

Answer

Only liquids are affected

Answer

Drugs stored in pharmacies are not affected by outside temperature