Which drug falls under Schedule IV?

Tramadol is classified as a Schedule IV controlled substance due to its potential for abuse and dependence. Schedule IV drugs are characterized by having a lower potential for abuse relative to Schedule I-III substances, but they still carry some risk. Tramadol is primarily used as a pain reliever and acts on the central nervous system, which can lead to tolerance and addiction in some individuals, warranting its classification in this category.

Robitussin, while it contains dextromethorphan, is not classified under the controlled substances act as a Schedule IV drug. Methaqualone, on the other hand, is listed as a Schedule I substance due to its high potential for abuse and little accepted medical use in the United States. Ketamine is classified as a Schedule III drug primarily due to its use in anesthesia and potential for abuse. Thus, the correct identification of Tramadol as a Schedule IV drug reflects its medical use balanced against the need for regulation to mitigate risks associated with its misuse.