Drugs used to treat depression, anxiety disorders, OCD, and PTSD; Ex: SSRI (Prozac, Zoloft, Paxil); SNRI (Cymbalta); New research into Ketamine

• A. Antidepressant drugs
• B. Antipsychotic drugs
• C. Antianxiety drugs
• D. Light Exposure Therapy

Answer: (A)

Antidepressant drugs are the medication class most commonly used across depression, anxiety disorders, OCD, and PTSD. They work mainly by boosting serotonin in the brain, and many also increase norepinephrine, helping to regulate mood, worry, obsessive thoughts, and fear responses. The examples given—SSRIs like Prozac, Zoloft, and Paxil—are typical first-line options because they effectively target a broad range of symptoms with relatively favorable safety profiles. SNRIs like Cymbalta expand this approach by elevating both serotonin and norepinephrine, which can help with a wider array of symptoms across these conditions.

Ketamine reflects newer research into rapid-acting antidepressants and has shown promise for treatment-resistant depression and related symptoms, illustrating how the antidepressant framework is expanding. In contrast, antipsychotic drugs are mainly for psychotic disorders and are sometimes used as augmentation in mood disorders, but not as the primary treatment across all the listed conditions. Antianxiety drugs, such as benzodiazepines, can alleviate acute anxiety but have limitations for long-term management and OCD/PTSD. Light exposure therapy is typically reserved for seasonal mood patterns rather than the broad spectrum presented here.

So the category that best fits the wide range of conditions in the question is antidepressant drugs.