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:Reference:

DEA Controlled Substances List (Schedule IV -- Butorphanol)

PTCB PTCE Exam Content Outline (Pharmacy Laws & Regulations -- Controlled Substances)

Federal Controlled Substances Act (CSA)