Final answer:
Antidepressants are currently the most often used class of drugs in treating social anxiety disorder.
Step-by-step explanation:
The class of drugs that is currently most often used in the treatment of social anxiety disorder is Antidepressants (a). These medications work by increasing the levels of certain chemicals in the brain, such as serotonin, which can help improve mood and reduce anxiety. One commonly prescribed antidepressant for social anxiety disorder is selective serotonin reuptake inhibitors (SSRIs), such as Prozac (fluoxetine) or Zoloft (sertraline).