Desvenlafaxine

Desvenlafaxine (O-desmethylvenlafaxine) is the 0-demetyhlated active metabolite of venlafaxine. Like its parent drug, desvenlafaxine is also an antidepressant belonging to the class of serotonin-norepinephrine reuptake inhibitor (SNRI) class. It was approved by the FDA in 2008 for the treatment of adults with major depressive disorder (MDD). MDD is a highly prevalent psychiatric disorder, with a lifetime prevalence estimate of 16% in the US alone and 12.8% in Europe. Although the exact mechanism of pathophysiology is still unknown, imbalances or deficiencies of monoamines have been heavily implicated, thus the rationale behind the use of SNRI to treat MDD. Desvenlafaxine has a very similar pharmacological, efficacy, and safety profile as venlafaxine. The major difference is the potential for drug interaction since venlafaxine is mainly metabolized by CYP2D6 while desvenlafaxine is conjugated by UGT; therefore, desvenlafaxine is less likely to cause drug-drug interaction when taken with medications affecting the CYP2D6 pathway.