Question 19

Butorphanol is a controlled substance.

Butorphanol is classified as a controlled substance due to its potential for abuse and dependence. This places it under strict regulations compared to other medications listed.

A) Metoprolol

Metoprolol is not a controlled substance; it is a beta-blocker commonly prescribed for hypertension and other heart-related issues. It does not carry a risk of dependency or abuse, which is a key factor in the classification of controlled substances.

B) Butorphanol

Butorphanol is indeed a controlled substance, specifically a Schedule IV drug in the United States. It is used for pain management and is known for its potential for dependency, thus necessitating regulation under controlled substance laws.

C) Carvedilol

Carvedilol is also a beta-blocker and is used primarily for heart failure and hypertension. Similar to metoprolol, it does not have abuse potential and is therefore not classified as a controlled substance.

D) Propranolol

Propranolol, like metoprolol and carvedilol, is a beta-blocker used to treat various cardiovascular conditions. It does not possess any properties that would classify it as a controlled substance due to the absence of abuse potential.

Conclusion

Butorphanol is classified as a controlled substance due to its potential for abuse and the risk of dependency, setting it apart from the other options listed. Metoprolol, carvedilol, and propranolol are all non-controlled substances that do not carry similar risks, making them unsuitable for this classification.