BSN HESI 315 Pharmacology Exam V1 | Latest Update
2026/2027 | 200 Practice Questions with Verified Answers &
Explanations | Nightingale College Complete Q&A Guide | A+
Graded
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS (Questions 125)
1. A client is prescribed a medication with a halflife of 4 days. Based on this halflife, the medication will
most likely be prescribed:
A) Once a day
B) Twice a day
C) Three times a day
D) Four times a day
Answer: A) Once a day
Explanation: Medications with long halflives remain at therapeutic levels between doses for extended
periods, allowing for oncedaily dosing. A halflife of 4 days is considered long, making oncedaily
administration appropriate to maintain steadystate concentrations.
2. A client being discharged home is prescribed an antibiotic with a dosage three times higher than it
was administered when in the hospital. Which route of administration should the nurse anticipate will
be prescribed for the greatest firstpass effect?
A) Oral
B) Sublingual
C) Intravenous
,D) Subcutaneous
Answer: A) Oral
Explanation: Oral medications undergo extensive firstpass metabolism in the liver, significantly reducing
bioavailability before reaching systemic circulation. Higher oral doses are often required to achieve the
same therapeutic effect as IV administration due to this firstpass effect.
3. Which route of administration should the nurse clarify with the healthcare provider prior to
administering a drug with a high firstpass effect?
A) Oral
B) Buccal
C) Sublingual
D) Intravenous
Answer: A) Oral
Explanation: Oral administration results in the highest firstpass effect because drugs absorbed from the
GI tract travel through the portal vein to the liver, where extensive metabolism occurs before reaching
systemic circulation.
4. A medication with a halflife of 2 hours is administered intravenously. Approximately how long will it
take for the drug to be eliminated from the body (assuming it takes about 5 halflives for complete
elimination)?
A) 4 hours
,B) 6 hours
C) 8 hours
D) 10 hours
Answer: D) 10 hours
Explanation: It takes approximately 5 halflives for a drug to be completely eliminated from the body.
With a halflife of 2 hours, 5 × 2 = 10 hours for complete elimination.
5. The nurse is administering a medication that is highly proteinbound. Which of the following
conditions would increase the risk of drug toxicity?
A) Decreased liver function
B) Decreased serum albumin levels
C) Increased renal function
D) Increased serum albumin levels
Answer: B) Decreased serum albumin levels
Explanation: When serum albumin levels are decreased (e.g., in malnutrition, liver disease, or nephrotic
syndrome), more free drug is available, increasing the risk of toxicity. Highly proteinbound drugs are
affected by changes in protein binding.
6. The therapeutic index of a drug refers to:
A) The amount of drug that reaches systemic circulation
, B) The ratio between the toxic dose and the therapeutic dose
C) The speed at which a drug is eliminated from the body
D) The percentage of drug bound to plasma proteins
Answer: B) The ratio between the toxic dose and the therapeutic dose
Explanation: The therapeutic index is the ratio of the toxic dose to the therapeutic dose. A narrow
therapeutic index indicates a small margin of safety and requires close monitoring.
7. A client is receiving a drug that is a weak acid. The nurse understands that this drug will be better
absorbed in which part of the GI tract?
A) Stomach (acidic environment)
B) Small intestine (neutral environment)
C) Large intestine (alkaline environment)
D) It does not matter
Answer: A) Stomach (acidic environment)
Explanation: Weak acids are better absorbed in acidic environments (stomach) because they are
nonionized and more lipidsoluble, allowing them to cross cell membranes more easily.
8. The nurse is teaching a client about a new medication. Which statement indicates the client
understands the concept of drug bioavailability?
A) "Bioavailability is the amount of drug that reaches my bloodstream."
2026/2027 | 200 Practice Questions with Verified Answers &
Explanations | Nightingale College Complete Q&A Guide | A+
Graded
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS (Questions 125)
1. A client is prescribed a medication with a halflife of 4 days. Based on this halflife, the medication will
most likely be prescribed:
A) Once a day
B) Twice a day
C) Three times a day
D) Four times a day
Answer: A) Once a day
Explanation: Medications with long halflives remain at therapeutic levels between doses for extended
periods, allowing for oncedaily dosing. A halflife of 4 days is considered long, making oncedaily
administration appropriate to maintain steadystate concentrations.
2. A client being discharged home is prescribed an antibiotic with a dosage three times higher than it
was administered when in the hospital. Which route of administration should the nurse anticipate will
be prescribed for the greatest firstpass effect?
A) Oral
B) Sublingual
C) Intravenous
,D) Subcutaneous
Answer: A) Oral
Explanation: Oral medications undergo extensive firstpass metabolism in the liver, significantly reducing
bioavailability before reaching systemic circulation. Higher oral doses are often required to achieve the
same therapeutic effect as IV administration due to this firstpass effect.
3. Which route of administration should the nurse clarify with the healthcare provider prior to
administering a drug with a high firstpass effect?
A) Oral
B) Buccal
C) Sublingual
D) Intravenous
Answer: A) Oral
Explanation: Oral administration results in the highest firstpass effect because drugs absorbed from the
GI tract travel through the portal vein to the liver, where extensive metabolism occurs before reaching
systemic circulation.
4. A medication with a halflife of 2 hours is administered intravenously. Approximately how long will it
take for the drug to be eliminated from the body (assuming it takes about 5 halflives for complete
elimination)?
A) 4 hours
,B) 6 hours
C) 8 hours
D) 10 hours
Answer: D) 10 hours
Explanation: It takes approximately 5 halflives for a drug to be completely eliminated from the body.
With a halflife of 2 hours, 5 × 2 = 10 hours for complete elimination.
5. The nurse is administering a medication that is highly proteinbound. Which of the following
conditions would increase the risk of drug toxicity?
A) Decreased liver function
B) Decreased serum albumin levels
C) Increased renal function
D) Increased serum albumin levels
Answer: B) Decreased serum albumin levels
Explanation: When serum albumin levels are decreased (e.g., in malnutrition, liver disease, or nephrotic
syndrome), more free drug is available, increasing the risk of toxicity. Highly proteinbound drugs are
affected by changes in protein binding.
6. The therapeutic index of a drug refers to:
A) The amount of drug that reaches systemic circulation
, B) The ratio between the toxic dose and the therapeutic dose
C) The speed at which a drug is eliminated from the body
D) The percentage of drug bound to plasma proteins
Answer: B) The ratio between the toxic dose and the therapeutic dose
Explanation: The therapeutic index is the ratio of the toxic dose to the therapeutic dose. A narrow
therapeutic index indicates a small margin of safety and requires close monitoring.
7. A client is receiving a drug that is a weak acid. The nurse understands that this drug will be better
absorbed in which part of the GI tract?
A) Stomach (acidic environment)
B) Small intestine (neutral environment)
C) Large intestine (alkaline environment)
D) It does not matter
Answer: A) Stomach (acidic environment)
Explanation: Weak acids are better absorbed in acidic environments (stomach) because they are
nonionized and more lipidsoluble, allowing them to cross cell membranes more easily.
8. The nurse is teaching a client about a new medication. Which statement indicates the client
understands the concept of drug bioavailability?
A) "Bioavailability is the amount of drug that reaches my bloodstream."
