NAPLEX PHARMACOLOGY AND DRUG INTERACTIONS ACTUAL EXAM
2025||144 QUESTIONS WITH VERIFIED CORRECT RATIONALES
1. A patient is prescribed Metronidazole for bacterial vaginosis but is also a
heavy drinker. What counseling points should you provide to the patient
regarding alcohol consumption while on this medication?
It is safe to drink alcohol in moderation while taking Metronidazole.
They should avoid alcohol during treatment and for at least 3 days
after discontinuation to prevent a disulfiram-like reaction.
Alcohol will enhance the effectiveness of Metronidazole.
They can consume alcohol as long as they take the medication with
food.
2. What is the recommended treatment for toxic megacolon associated with
C. difficile infection?
Metronidazole IV and Vancomycin NG
Ciprofloxacin and Metronidazole PO
Vancomycin IV and Clindamycin PO
Metronidazole PO and Doxycycline IV
3. Explain why sulfamethoxazole/trimethoprim should not be used in patients
with a sulfa allergy.
It can cause severe allergic reactions.
, It is ineffective in treating infections.
It may lead to increased side effects.
It can interact negatively with other medications.
4. Which of the following is true?
Linezolid/tedizolid are contraindicated with other MAOIs
, Linezolid is dosed once daily
Tedizolid is dosed twice daily
These drugs don't cover VRE
5. Explain the significance of the target levels for Digoxin in heart failure
management. What are the recommended levels?
0.5-0.9 ng/mL; they indicate the effectiveness of the drug in
reducing heart failure symptoms.
0.5-0.9 ng/mL; they are used to prevent toxicity and ensure
therapeutic effectiveness.
0.5-0.9 ng/mL; they are the levels at which the drug becomes
ineffective.
0.5-0.9 ng/mL; they are the levels that indicate the need for dosage
adjustment.
6. Explain why Metronidazole should not be used with alcohol. What are the
potential consequences of this interaction?
It can cause increased blood pressure and heart rate.
It may lead to a disulfiram-like reaction, resulting in abdominal
cramping, nausea, vomiting, headaches, and flushing.
It enhances the effectiveness of alcohol in treating infections.
It reduces the side effects of Metronidazole.
7. In the combination of Sulfamethoxazole and Trimethoprim, (Bactrim), these
2 agents are added in a 5:1 ratio because-
, Trimethoprim has higher binding affinity than Sulfamethoxazole.
Sulfamethoxazole has higher binding affinity than Trimethoprim.
Trimethoprim is absorbed better than Sulfamethoxazole.
This ratio reduces the light sensitivity of the molecule.
2025||144 QUESTIONS WITH VERIFIED CORRECT RATIONALES
1. A patient is prescribed Metronidazole for bacterial vaginosis but is also a
heavy drinker. What counseling points should you provide to the patient
regarding alcohol consumption while on this medication?
It is safe to drink alcohol in moderation while taking Metronidazole.
They should avoid alcohol during treatment and for at least 3 days
after discontinuation to prevent a disulfiram-like reaction.
Alcohol will enhance the effectiveness of Metronidazole.
They can consume alcohol as long as they take the medication with
food.
2. What is the recommended treatment for toxic megacolon associated with
C. difficile infection?
Metronidazole IV and Vancomycin NG
Ciprofloxacin and Metronidazole PO
Vancomycin IV and Clindamycin PO
Metronidazole PO and Doxycycline IV
3. Explain why sulfamethoxazole/trimethoprim should not be used in patients
with a sulfa allergy.
It can cause severe allergic reactions.
, It is ineffective in treating infections.
It may lead to increased side effects.
It can interact negatively with other medications.
4. Which of the following is true?
Linezolid/tedizolid are contraindicated with other MAOIs
, Linezolid is dosed once daily
Tedizolid is dosed twice daily
These drugs don't cover VRE
5. Explain the significance of the target levels for Digoxin in heart failure
management. What are the recommended levels?
0.5-0.9 ng/mL; they indicate the effectiveness of the drug in
reducing heart failure symptoms.
0.5-0.9 ng/mL; they are used to prevent toxicity and ensure
therapeutic effectiveness.
0.5-0.9 ng/mL; they are the levels at which the drug becomes
ineffective.
0.5-0.9 ng/mL; they are the levels that indicate the need for dosage
adjustment.
6. Explain why Metronidazole should not be used with alcohol. What are the
potential consequences of this interaction?
It can cause increased blood pressure and heart rate.
It may lead to a disulfiram-like reaction, resulting in abdominal
cramping, nausea, vomiting, headaches, and flushing.
It enhances the effectiveness of alcohol in treating infections.
It reduces the side effects of Metronidazole.
7. In the combination of Sulfamethoxazole and Trimethoprim, (Bactrim), these
2 agents are added in a 5:1 ratio because-
, Trimethoprim has higher binding affinity than Sulfamethoxazole.
Sulfamethoxazole has higher binding affinity than Trimethoprim.
Trimethoprim is absorbed better than Sulfamethoxazole.
This ratio reduces the light sensitivity of the molecule.
