Final answer:
The primary medication for bipolar disorder treatment is mood stabilizers, specifically lithium. This medication helps regulate the manic and depressive phases inherent to the disorder, and may be complemented by other treatments such as antipsychotics and psychotherapy.
Step-by-step explanation:
In the treatment of bipolar disorders, the primary medication used as the mainstay of therapy is c) Mood stabilizers, such as lithium. Mood stabilizers work by mitigating the swings between the manic and depressive phases that characterize bipolar disorder. Lithium, in particular, has a long history of effectiveness in treating bipolar disorder and is often considered the gold standard for such treatment. Alongside mood stabilizers, other treatments like antipsychotics, psychotherapy, and electroconvulsive therapy may be used to help manage symptoms and stabilize mood.