,NURS 251 Module 1 Exam | Pharmacology | Portage
Learning | Q & A | 2026 Edition
1. Which of the following is the study or science of drugs?
A) Pharmaceutics
B) Pharmacodynamics
C) Pharmacology
D) Pharmacokinetics
Correct Answer: Pharmacology
Rationale: Pharmacology is defined as the study or science of drugs, encompassing how drugs affect the
physiologic processes of living organisms. Pharmaceutics is the study of how dosage forms influence
drug effects, pharmacodynamics is what the drug does to the body, and pharmacokinetics is what the
body does to the drug.
2. What is a drug?
A) Any chemical that affects the physiologic processes of a living organism
B) Any substance that is only used for treating disease
C) A chemical compound that is always synthetic
D) Any medication that requires a prescription
Correct Answer: Any chemical that affects the physiologic processes of a living organism
Rationale: A drug is defined as any chemical that affects the physiologic processes of a living organism.
While drugs are commonly used for diagnosing, curing, or treating disease, the definition is broader and
includes any chemical that produces a physiological effect.
3. Which drug effect is the desired effect to alleviate a condition or symptom?
A) Side effect
B) Adverse effect
,C) Toxic effect
D) Therapeutic effect
Correct Answer: Therapeutic effect
Rationale: The therapeutic effect is the desired drug effect intended to alleviate a condition or symptom.
Side effects are undesirable but not harmful, adverse effects are potentially harmful, and toxic effects
imply poisoning of the body.
4. A patient reports mild nausea after taking a new medication, which resolves when the medication is
taken with food. This best describes which type of drug effect?
A) Toxic effect
B) Adverse effect
C) Side effect
D) Therapeutic effect
Correct Answer: Side effect
Rationale: A side effect is an undesirable drug effect that is not harmful and can often be managed. Mild
nausea that resolves with food is a classic example of a side effect, as it does not cause harm and the
drug therapy can continue without problem.
5. Which type of drug effect is undesirable, potentially harmful, and requires a risk-versus-benefit
assessment?
A) Therapeutic effect
B) Side effect
C) Adverse effect
D) Pharmacologic effect
Correct Answer: Adverse effect
, Rationale: An adverse effect is a general term for undesirable and potentially harmful drug effects.
Healthcare providers must weigh the risk versus benefit of continuing a medication when adverse
effects occur, as the benefit may outweigh the risk in some cases.
6. Which drug effect implies that the drug is poisoning the body and can be life-threatening?
A) Side effect
B) Adverse effect
C) Toxic effect
D) Therapeutic effect
Correct Answer: Toxic effect
Rationale: Toxic effects are undesirable drug effects that imply the drug is poisoning the body and can
be harmful or even life-threatening. When a treatment becomes too toxic, it may need to be suspended.
7. A patient on chemotherapy experiences significant adverse effects, but treatment continues because
the benefit of treating the cancer outweighs the risks. This illustrates which principle?
A) Dose-dependent relationship
B) Risk-versus-benefit assessment
C) Therapeutic index
D) Pharmacodynamic tolerance
Correct Answer: Risk-versus-benefit assessment
Rationale: Drug therapy often involves a risk-versus-benefit assessment where the provider weighs the
risks of taking a medication against its benefits. In cancer chemotherapy, significant adverse effects may
be tolerated because the benefit of treating the cancer is greater.
8. The location within the body where a drug exerts its therapeutic effect is called the:
A) Binding site
B) Active transport site
Learning | Q & A | 2026 Edition
1. Which of the following is the study or science of drugs?
A) Pharmaceutics
B) Pharmacodynamics
C) Pharmacology
D) Pharmacokinetics
Correct Answer: Pharmacology
Rationale: Pharmacology is defined as the study or science of drugs, encompassing how drugs affect the
physiologic processes of living organisms. Pharmaceutics is the study of how dosage forms influence
drug effects, pharmacodynamics is what the drug does to the body, and pharmacokinetics is what the
body does to the drug.
2. What is a drug?
A) Any chemical that affects the physiologic processes of a living organism
B) Any substance that is only used for treating disease
C) A chemical compound that is always synthetic
D) Any medication that requires a prescription
Correct Answer: Any chemical that affects the physiologic processes of a living organism
Rationale: A drug is defined as any chemical that affects the physiologic processes of a living organism.
While drugs are commonly used for diagnosing, curing, or treating disease, the definition is broader and
includes any chemical that produces a physiological effect.
3. Which drug effect is the desired effect to alleviate a condition or symptom?
A) Side effect
B) Adverse effect
,C) Toxic effect
D) Therapeutic effect
Correct Answer: Therapeutic effect
Rationale: The therapeutic effect is the desired drug effect intended to alleviate a condition or symptom.
Side effects are undesirable but not harmful, adverse effects are potentially harmful, and toxic effects
imply poisoning of the body.
4. A patient reports mild nausea after taking a new medication, which resolves when the medication is
taken with food. This best describes which type of drug effect?
A) Toxic effect
B) Adverse effect
C) Side effect
D) Therapeutic effect
Correct Answer: Side effect
Rationale: A side effect is an undesirable drug effect that is not harmful and can often be managed. Mild
nausea that resolves with food is a classic example of a side effect, as it does not cause harm and the
drug therapy can continue without problem.
5. Which type of drug effect is undesirable, potentially harmful, and requires a risk-versus-benefit
assessment?
A) Therapeutic effect
B) Side effect
C) Adverse effect
D) Pharmacologic effect
Correct Answer: Adverse effect
, Rationale: An adverse effect is a general term for undesirable and potentially harmful drug effects.
Healthcare providers must weigh the risk versus benefit of continuing a medication when adverse
effects occur, as the benefit may outweigh the risk in some cases.
6. Which drug effect implies that the drug is poisoning the body and can be life-threatening?
A) Side effect
B) Adverse effect
C) Toxic effect
D) Therapeutic effect
Correct Answer: Toxic effect
Rationale: Toxic effects are undesirable drug effects that imply the drug is poisoning the body and can
be harmful or even life-threatening. When a treatment becomes too toxic, it may need to be suspended.
7. A patient on chemotherapy experiences significant adverse effects, but treatment continues because
the benefit of treating the cancer outweighs the risks. This illustrates which principle?
A) Dose-dependent relationship
B) Risk-versus-benefit assessment
C) Therapeutic index
D) Pharmacodynamic tolerance
Correct Answer: Risk-versus-benefit assessment
Rationale: Drug therapy often involves a risk-versus-benefit assessment where the provider weighs the
risks of taking a medication against its benefits. In cancer chemotherapy, significant adverse effects may
be tolerated because the benefit of treating the cancer is greater.
8. The location within the body where a drug exerts its therapeutic effect is called the:
A) Binding site
B) Active transport site
