What are medications called that are used to alleviate Fear Anxiety Syndrome (FAS) when necessary?

The term used to describe medications that help alleviate Fear Anxiety Syndrome (FAS) when necessary is best characterized as adjunctive medications. Adjunctive medications are those that are not the primary treatment but are used in combination with other therapies to enhance overall effectiveness. In the context of fear and anxiety in animals, these medications are typically applied alongside behavior modification techniques to support and improve the animal's response to treatment. This approach recognizes that managing anxiety often requires a multifaceted strategy, where medications can provide supplemental relief to behavioral interventions.

While the other options refer to various types of medications, they do not capture the essence of how adjunctive medications function in this scenario. For example, psychotropic medications generally refer to a broader category encompassing drugs that affect mood, behavior, and mental processes. Calming pharmaceuticals and anti-anxiety medications can overlap with adjunctive treatments but do not encompass the idea of providing support alongside primary interventions as clearly as adjunctive medications do. Thus, the more specific terminology related to a supportive role in treatment is apt in this context.