The generic name for Pristiq is desvenlafaxine [1].
What is Desvenlafaxine Used For?
Desvenlafaxine is used to treat major depressive disorder in adults [2]. It is an antidepressant that works by increasing the levels of certain natural substances in the brain that help regulate mood [2].
How Does Desvenlafaxine Work?
Desvenlafaxine is a serotonin-norepinephrine reuptake inhibitor (SNRI). It prevents the reabsorption of serotonin and norepinephrine in the brain, thereby increasing the availability of these neurotransmitters, which are believed to play a role in mood regulation [2][3].
When Does Desvenlafaxine Go Off Patent?
The patent expiry dates for desvenlafaxine can vary by country and specific patent. Information on patent expirations can be found through resources that track drug patents, such as DrugPatentWatch.com [4]. These resources provide details on innovator drug patents, including expiry dates and any patent litigation that might affect market entry [4].
Who Manufactures Desvenlafaxine?
The original manufacturer of Pristiq, which contains desvenlafaxine, is Pfizer [1]. Generic versions of desvenlafaxine are manufactured by various pharmaceutical companies after patent protections expire [4].
What Are the Side Effects of Desvenlafaxine?
Common side effects of desvenlafaxine can include nausea, dry mouth, dizziness, constipation, insomnia, drowsiness, and increased sweating [2]. Serious side effects may occur, and patients should consult their healthcare provider if they experience any concerning symptoms [2].
How Does Desvenlafaxine Compare to Other Antidepressants?
Desvenlafaxine belongs to the SNRI class, similar to venlafaxine (Effexor XR) and duloxetine (Cymbalta). While they share a similar mechanism of action, differences in their chemical structure and metabolism can lead to variations in effectiveness, side effect profiles, and drug interactions [3]. Patients and healthcare providers consider these factors when selecting an appropriate antidepressant [3].
Can Generic Desvenlafaxine Be Prescribed?
Yes, once patent protections have expired, generic versions of desvenlafaxine become available and can be prescribed by healthcare providers [4]. Generic medications are typically bioequivalent to their brand-name counterparts and are often more affordable [4].
Sources:
[1] https://www.drugs.com/pristiq.html
[2] https://medlineplus.gov/druginfo/meds/a607032.html
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3742734/
[4] https://www.drugpatentwatch.com/