Before you consider disposing expired medicines by flushing, you should first check the medicine label or information leaflet if the medicine is recommended by the _____________ for disposal.

The correct answer is that you should check the medicine label or information leaflet if the medicine is recommended by the Food and Drug Administration (FDA) for disposal. The FDA is responsible for regulating food and drugs in many countries, including providing guidelines on how to properly dispose of medications. They typically have established protocols to ensure that medications that could be harmful to the environment or public health are disposed of correctly. This includes providing recommendations on whether certain medications can be safely flushed or if they should be returned to a pharmacy or taken to a designated disposal site.

In contrast, the other agencies mentioned do not primarily focus on the regulation of medications in the same way. The Department of Trade and Industry (DTI) is concerned with trade and commerce, while the Department of Agrarian Reform (DAR) deals with land reform and agricultural issues. The Department of Health (DOH) does oversee broader public health concerns but does not typically offer specific guidelines for medication disposal on the scale that the FDA does. Therefore, the FDA is the most relevant authority to consult regarding the disposal of expired medicines.