Here’s a list of compiled links providing information on Pristiq. These links include info from my blog and others.
I just learned that Wyeth produces two major menopause drugs, Premarin and Prempro, that allegedly has produced hormones causing cancer in more than 5,000 women. This added up to a loss of 40 million users and $1 billion annually.
With Effexor going generic in 2 years and the introduction of Pristiq to the market, Wyeth hopes to lure some of those customers back and net an annual $2 billion. However, serious questions linger about Pristiq’s side effects in menopausal women.
Why did two women in the study group taking Pristiq have heart attacks
and three need procedures to repair clogged arteries compared with none
taking placebo? How can Wyeth assure long term safety when 604 of the
2,158 test subjects took Pristiq for only six months and 318 for a year
or more? And what about serious liver complications seen in the studies?
Martha Rosenberg, reporting on Pristiq’s use as a menopausal drug, culled comments from CafePharma’s message boards and found one thread rife with mixed comments on the new drug. From an Anonymous commenter:
As patents expire on a variety of drugmakers’ moneymakers, pharma companies have gone to great lengths to structurally reinvent the successful drugs then tout the benefits that differ from their predecessors.
Case in point — Johnson & Johnson’s Invega. Invega is the successor to the popular antipsychotic drug, Risperdal, and competitor to AstraZeneca’s widely used antipsychotic Seroquel. Scott Hensley at The Wall Street Journal’s Health Blog (WSJ) reports that Risperdal is going generic in June. Gianna at Beyond Meds recently said it will not. According to the Dow Jones Newswires (DJN), these “junior” drugs face skepticism from health insurers and doctors. California-based Kaiser Permanente and Minneapolis-based UnitedHealth Group Inc. (UNH) are example of companies that have somewhat discouraged use of the drug. Kaiser doesn’t cover Invega at all, and members of UNH are required to pay higher copays for the brand name. The wire reports New York-based psychiatrist Jeffrey Lieberman wasn’t “buying it” the difference between Invega and Risperdal.
Invega is “basically a me-too drug, and the company hasn’t done the studies that would be required to really distinguish it,” Lieberman, chairman of the psychiatry department at Columbia University’s medical school told Peter Loftus of Dow Jones Newswires.
The blog also quotes Daniel Carlat from the The Carlat Psychiatry Report.
Dan Carlat, a psychiatrist and a tough critic of Invega, wrote that J&J’s “marketing team apparently missed the fact that the word in the English language that sounds most like “Invega” is “inveigle,” meaning “to entice, lure, or ensnare by flattery or artful talk or inducements.’ ” He asked doctors: “Will you be doing your patients a favor by taking the plunge? Or will you simply be giving them the same wine in a fancier bottle?”
Even J&J’s Group Chairman of Pharmaceuticals, David Norton, admitted that Invega is a tough sell.
“We need to do a better job at drawing a differentiation in a difficult-to-treat population.”
So far, Invega sales have been incredibly disappointing compared to the Risperdal blockbuster.
Wyeth (antidepressant Effexor XR cum Pristiq) and Shire (ADHD drug Adderall XR cum Vyvanse) face the same uphill battle. Wyeth’s Effexor faces generic competition from Teva Pharmaceuticals despite efforts to halt generic sales of the drug and the patent on Shire’s Adderall is set to expire next year.
Hensley, in his analysis, raises a question in which the answer remains to be seen:
Cheap generics abound to treat a broad assortment of illnesses these days. What’s the point, the critics ask, of paying more for drugs that are at best only slight improvements over tried and true medicines available at bargain prices?
In an attempt to have the “me-too” drugs compete with its derivative, both Wyeth and Shire are slashing their prices, or as the DJN reported, “emphasizing improved dosing for the newer drugs.” Although Pristiq’s efficacy comes at higher doses, it’s being priced 20 percent lower than Effexor.
[Deutsche Bank pharmaceutical analyst Barbara Ryan] thinks the odds of
Pristiq’s success are slim because it appears to offer few benefits
beyond those of Effexor.
That remains to be seen. So far, a few patients have commented on my blog that Pristiq has already begun to help them. I haven’t seen any DTC ads for Pristiq so I can only assume that drug reps are doing a fine marketing job at selling the different benefits of the drug to doctors.
Vyvanse, on the other hand, is looking promising for Shire, already having 7 percent of U.S. ADHD drug prescriptions. Chief Executive Matthew Emmens says the drug is chemically different from Adderall (aren’t they all?) and has better pricing. Shire expects to beat Adderall’s 26 percent peak market share. Seems like a lofty goal to me.
As for Invega, J&J is currently seeking FDA approval to use the drug for bipolar disorder and not just treatment for schizophrenia. It is also l0oking to get approval for an injectable Invega XR.
(Invega logo from Janssen.com)