Correct Answer: B
Butorphanolis aSchedule IV controlled substanceunder theControlled Substances Act (CSA). It is anopioid analgesicused formoderate-to-severe painandmigraine relief. Due to itsabuse potential, it is classified as acontrolled substanceand requires special handling in pharmacies.
* A. Metoprolol# Incorrect; metoprolol is abeta-blockerforhypertension and heart diseaseand isnot a controlled substance.
* C. Carvedilol# Incorrect; carvedilol is also abeta-blockerforheart failure and hypertension, not a controlled drug.
* D. Propranolol# Incorrect; propranolol is abeta-blockerused forhypertension, migraines, and anxiety, but it isnot a controlled substance.
Other Answer Choices Explained:References:
* DEA Controlled Substances List (Schedule IV - Butorphanol)
* PTCB PTCE Exam Content Outline (Pharmacy Laws & Regulations - Controlled Substances)
* Federal Controlled Substances Act (CSA)