A product with not more than 1.8 g of codeine per 100 mL is assigned to which Schedule?

A product that contains not more than 1.8 grams of codeine per 100 mL falls under Schedule III according to the Controlled Substances Act. Schedule III substances are those that have a recognized medical use and have a lower potential for abuse compared to Schedule I and Schedule II drugs. Specifically, Schedule III allows for certain medications that may contain lower amounts of narcotics, with codeine being one of them in specified concentrations.

The designation is based on the abuse potential and the medical utility of the substance. In this case, the presence of codeine at the specified concentration is considered to have therapeutic uses, while still presenting some risk for abuse, but not to the extent seen with drugs in the higher schedules. Therefore, it's classified in Schedule III to regulate it while allowing its therapeutic use under medical supervision.