Robitussin AC is listed under which schedule?

• A. Schedule II
• B. Schedule III
• C. Schedule IV
• D. Schedule V

Answer: (D)

Understanding how drugs are scheduled hinges on abuse potential and the amount of the controlled substance in the product. Robitussin AC contains guaifenesin plus a small amount of codeine. Because the codeine content is limited, the product is placed in Schedule V, which covers preparations with only a small amount of a controlled substance that have medical use but lower abuse risk. Higher schedules would apply to products with more codeine or greater abuse potential. So, the low codeine content in this cough syrup makes it Schedule V.