What defines semi-synthetic drugs?

Semi-synthetic drugs are defined as substances that are modified versions of natural compounds, typically derived from plants, animals, or minerals, but altered through chemical processes in a laboratory setting. This definition illustrates that while these drugs originate from natural sources, they undergo synthesis to enhance their properties, efficacy, or to create a version that is more suitable for therapeutic use.

The option reflecting this definition emphasizes the blend of natural and synthetic processes involved in creating semi-synthetic drugs. This combination results in medications that maintain some characteristics of the original compounds while also benefitting from the modifications made during synthesis.

Other definitions do not capture the hybrid nature of semi-synthetic drugs. For instance, stating they are derived solely from minerals would exclude the broader sources from which they can be derived. Describing them as entirely artificial would ignore their natural origins and imply they have no connection to existing biological materials. Lastly, identifying them as exclusively sourced from plants would neglect the fact that they can also be derived from animals and minerals, thus limiting the correct understanding of their origin.