|Trade names||Pristiq, Desfax, Ellefore|
|Protein binding||Low (30%)|
|Metabolism||CYP3A4, (CYP2D6 is not involved)|
|Elimination half-life||11 h|
|Excretion||45% excreted unchanged in urine|
|Chemical and physical data|
|Molar mass||263.38 g/mol|
|3D model (JSmol)|
Desvenlafaxine (brand name: Pristiq, Desfax, Ellefore), also known as O-desmethylvenlafaxine, is an antidepressant of the serotonin-norepinephrine reuptake inhibitor (SNRI) class developed and marketed by Wyeth (now part of Pfizer). Desvenlafaxine is a synthetic form of the major active metabolite of venlafaxine (sold under the brand names Effexor and Efexor). It is being targeted as the first non-hormonal based treatment for menopause.
Desvenlafaxine's primary use in medicine is the treatment of major depressive disorder.
Very common adverse effects include:
- Dry mouth
Common adverse effects include:
Uncommon adverse effects include:
Rare adverse effects include:
Common however unknown intensity of adverse effects include:
Desvenlafaxine is a synthetic form of the isolated major active metabolite of venlafaxine, and is categorized as a serotonin-norepinephrine reuptake inhibitor (SNRI). When most normal metabolizers take venlafaxine, approximately 70% of the dose is metabolized into desvenlafaxine, so the effects of the two drugs are expected to be very similar. It works by blocking the "reuptake" transporters for key neurotransmitters affecting mood, thereby leaving more active neurotransmitters in the synapse. The neurotransmitters affected are serotonin (5-hydroxytryptamine) and norepinephrine (noradrenaline). It is approximately 10 times more potent at inhibiting serotonin uptake than norepinephrine uptake.
Wyeth announced on 23 January 2007 that it received an "approvable" letter from the Food and Drug Administration for desvenlafaxine. Final approval to sell the drug was contingent on a number of things, including:
- A satisfactory FDA inspection of Wyeth's Guayama, Puerto Rico facility, where the drug is to be manufactured;
- Several postmarketing surveillance commitments, and follow-up studies on low-dose use, relapse, and use in children;
- Clarity by Wyeth around the company's product education plan for physicians and patients;
- Approval of desvenlafaxine's proprietary name, Pristiq.
In March 2017, the generic form of the drug was made available in the US.
On February 4, 2009, Health Canada approved use of desvenlafaxine for treatment of depression. Pristiq is now available in Canadian pharmacies.
In 2008, Wyeth withdrew its application for Ellefore, the product under review for treatment of major depressive disorder in the European Union. In 2012, Pfizer received authorization in Spain to market Pristiq for the disorder in 50 mg and 100 mg tablets.
Desvenlafaxine is classified as a schedule 4 (prescription only) drug in Australia. It was listed on the PBS (Pharmaceutical Benefits Scheme) in 2008 for the treatment of MDD (Major Depressive Disorders).
In clinical trials, desvenlafaxine demonstrated a significant superiority to placebo both in changes from baseline in the HAM-D17 score and in measures of well being such as the Sheehan Disability Scale (SDS) and 5-item World Health Organization Well-Being Index (WHO-5).
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- "PRODUCT INFORMATION PRISTIQ® desvenlafaxine (as succinate)" (PDF). TGA eBusiness Services. Pfizer Australia Pty Ltd. 10 December 2012. Retrieved 8 November 2013.
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- "Wyeth Receives Approvable Letter From FDA For Pristiq (Desvenlafaxine Succinate) For The Treatment Of Major Depressive Disorder" (Press release). 2007-01-23. Retrieved 2007-04-04.
- "FDA Approves Pristiq" (Press release). Wyeth. 2008-02-29. Retrieved 2008-02-29.
- Health Canada Notice of Compliance - Pristiq. February 4, 2009, retrieved on March 9, 2009.
- "Summary Basis of Decision (SBD) PrPristiq™". Health Canada. 2009-05-29. Retrieved 2016-12-30.
- "Pristiq 100 mg Comprimidos de Liberacion Prolongada". AEMPS Medicines Online Information Center - CIMA. Retrieved 2016-12-30.
- "Pristiq 50 mg Comprimidos de Liberacion Prolongada". AEMPS Medicines Online Information Center - CIMA. Retrieved 2016-12-30.
- "Pristiq" (in Spanish). Pfizer. Retrieved 2016-12-30.
- Thase ME, Kornstein SG, Germain JM, Jiang Q, Guico-Pabia C, Ninan PT (March 2009). "An integrated analysis of the efficacy of desvenlafaxine compared with placebo in patients with major depressive disorder". CNS Spectr. 14 (3): 144–54. PMID 19407711.
- Soares CN, Kornstein SG, Thase ME, Jiang Q, Guico-Pabia CJ (October 2009). "Assessing the efficacy of desvenlafaxine for improving functioning and well-being outcome measures in patients with major depressive disorder: a pooled analysis of 9 double-blind, placebo-controlled, 8-week clinical trials". J Clin Psychiatry. 70 (10): 1365–71. doi:10.4088/JCP.09m05133blu. PMID 19906341.