Which of the following drugs is listed as Schedule IV in the material?

• A. Pseudoephedrine
• B. Phentermine
• C. Dexedrine
• D. Diethylpropion

Answer: (D)

Understanding drug scheduling helps explain why this option is the one labeled Schedule IV. Schedule IV drugs are medicines with legitimate medical uses and lower potential for abuse and dependence compared with those in Schedule II or III. Diethylpropion fits this category as an appetite suppressant prescribed for obesity, carrying a relatively lower abuse risk. That’s why it’s listed as Schedule IV in the material.

Dexedrine (dextroamphetamine) has a higher potential for abuse and is placed in Schedule II. Pseudoephedrine is not a scheduled substance under the CSA; it’s regulated as a List I chemical due to its use as a precursor in illicit drug manufacture. Phentermine is typically treated as Schedule IV in many references, but in the material you’re using, the drug that matches Schedule IV among the options is diethylpropion.