What is one common medication used for the treatment of OCD?

Fluvoxamine, marketed as Luvox, is a selective serotonin reuptake inhibitor (SSRI) that is commonly used in the treatment of obsessive-compulsive disorder (OCD). SSRIs are considered first-line pharmacological treatments for OCD because they have been shown to effectively reduce the symptoms associated with the disorder, such as obsessive thoughts and compulsive behaviors. Fluvoxamine works by increasing the levels of serotonin in the brain, which helps to modulate mood and anxiety, ultimately leading to a reduction in OCD symptoms.

The other medications listed have different primary uses. Alprazolam, primarily prescribed for anxiety disorders, may not have a specific effect on OCD. Hydrochlorothiazide is a diuretic used mainly for hypertension and fluid retention and has no relevance to OCD treatment. Quetiapine, an atypical antipsychotic, is generally used for mood disorders and schizophrenia rather than OCD. Thus, Fluvoxamine stands out as the most appropriate choice for treating OCD.