Which of the following is NOT a recognized SSRI?

Venlafaxine is an antidepressant that does not belong to the selective serotonin reuptake inhibitor (SSRI) class. Instead, it is classified as a serotonin-norepinephrine reuptake inhibitor (SNRI). SNRIs work by increasing the levels of both serotonin and norepinephrine in the brain, which can be effective in treating depression and anxiety disorders.

On the other hand, sertraline, escitalopram, and citalopram are all recognized SSRIs. These medications specifically target the reuptake of serotonin, thereby enhancing serotonin neurotransmission in the brain, which is believed to improve mood and relieve symptoms of depression and anxiety.

Understanding the classification of these medications is crucial for identifying appropriate treatments for various mental health conditions.