The ODYSSEY Trial Ends Properly— However Will It Be Sufficient?


Sanofi and Regeneron achieved a modest victory with the a lot anticipated ODYSSEY Outcomes trial of its ldl cholesterol reducing drug Praluent (alirocumab). The trial met its major endpoint and even reported a major enchancment in all-cause mortality. However the mortality discovering has an asterisk connected to it and it’s removed from clear whether or not the general trial is optimistic sufficient to considerably alter the cost-benefit considerations which have up to now been the chief barrier to wider use of alirocumab and its shut cousin, Amgen’s PCSK9 inhibitor evolocumab (Repatha).

The ODYSSEY Outcomes trial was introduced on Saturday morning in Orlando, Florida on the annual assembly of the American School of Cardiology.

ODYSSEY in contrast alirocumab (Praluent, Sanofi/Regeneron) with placebo in 18,924 sufferers with a latest (1-12 months) coronary heart assault (MI) or unstable angina. The trial met its major endpoint, decreasing the first endpoint (the mix of MI, stroke, demise from coronary coronary heart illness, or unstable angina requiring hospitalization) by 15% (HR=Zero.85, CI: Zero.78-Zero.93, p=Zero.0003).

Particular person elements of the first endpoint:

CHD demise: 2.2% for alirocumab versus 2.three%, p=Zero.38
Non-fatal MI: 6.6% versus 7.6%, HR Zero.86 (CI Zero.77 – Zero.96), p = Zero.006
Ischemic stroke: 1.2% versus 1.6%, HR Zero.73 (CI Zero.57 – Zero.93), p = Zero.01
Unstable angina: Zero.four% versus Zero.6%, HR Zero.61 (CI Zero.41 – Zero.92), p = Zero.02

The investigators additionally reported a major discount in total mortality, from four.1% within the placebo group to three.5% within the alirocumab group (HR=Zero.85; CI: Zero.73-Zero.98, p = Zero.026). As a result of, in accordance with the predetermined statistical evaluation plan, the discount in CHD mortality didn’t obtain statistical significance, the discount in total mortality was thought of an observational discovering. Because of this, this implies the corporate won’t be able to make a mortality discount declare with out qualification. Sanjay Kaul (Cedars-Sinai) commented that the mortality discovering  shouldn’t be thought of sturdy.

There’ll virtually actually be a major quantity of debate concerning the subgroup of sufferers who had excessive ranges of LDL at baseline (100 mg/dl or above). Practically all of the profit within the trial was noticed on this subgroup. MACE was diminished by 24%, from 14.9% within the placebo group to 11.5% within the alirocumab group (HR=Zero.76, CI Zero.65-Zero.87) and total mortality by 29% (HR=Zero.71, CI Zero.56-Zero.90). Regeneron and Sanofi estimate that about 1.three million folks within the US fall into the subgroup of ACS sufferers with persistent LDL ranges above 100 mg/dl regardless of taking statins.

One other vital discovering is that no new issues of safety emerged within the trial. Specifically, there was no extra of both diabetes or neurocognitive negative effects within the trial, thereby serving to to settle an vital lingering query concerning the PCSK9 inhibitors. Nonetheless, as anticipated, sufferers within the alirocumab group did have extra injection website reactions.


ODYSSEY will probably be seen as each per FOURIER, the sooner cardiovascular outcomes trial (CVOT) with Amgen’s evolocumab, and an incremental advance on that trial. Regardless of variations in affected person populations and trial design, each trials resulted in a major however modest 15% discount within the major endpoint. However the ODYSSEY mortality outcomes and the subgroup leads to sufferers with baseline LDL ranges over 100 mg/dl seem to confer a determined benefit for ODYSSEY. The outcomes will probably be seen as confirming the view that Amgen could have shot itself within the foot with FOURIER.  In an try to achieve a aggressive benefit over Sanofi/Regeneron, Amgen elevated the scale of FOURIER to build up extra endpoint occasions in as quick a time period as attainable. Because of this FOURIER was in a position to report outcomes one yr earlier than ODYSSEY. However the draw back is that FOURIER could have been unable to replicate the total advantage of evolocumab, since many occasions within the trial occurred earlier than the helpful results of the drug had time to emerge.

It’s not in any respect clear whether or not the modest incremental advantage of ODYSSEY will result in considerably elevated uptake of the drug. Insurance coverage firms have raised practically insuperable limitations to reimbursement. (The medication now have an inventory value of greater than $14,000 per yr however are often discounted to about $9,000.) Many cardiologists have tried and did not get these medication authorised for his or her excessive danger sufferers with persistently excessive levels of cholesterol even after taking or failing to tolerate statins. ODYSSEY doesn’t seem more likely to considerably alter the price profit equation.

Some specialists speculate that Regeneron and Sanofi will use the outcomes of ODYSSEY to seize market share from Amgen. Regeneron and Sanofi reported worldwide alirocumab gross sales in 2017 of solely $194 million, $131 million of which was within the US. Amgen’s evolocumab had worldwide gross sales in 2017 of $319 million, $225 million of which was within the US. Regeneron and Sanofi may additionally use the trial to attempt to broaden the general market for PCSK9 inhibitors.

Gregory Schwartz (College of Colorado), the principal investigator of ODYSSEY, mentioned he didn’t know if the outcomes could be sturdy sufficient to change considerations about price. “Will probably be our friends that can resolve this,” he mentioned. The mortality discovering is “basically completely different,” as a result of it issues to each physicians and sufferers. “With all of the caveats of the nominal p worth that is believable and matches with a long time of our understanding of the biology,” mentioned Schwartz.

Phillippe Gabriel Steg (Imperial School of London and College of Paris), the chair of the trial, mentioned that “if the drug was very low-cost then we’d use it in all people.” He mentioned it was “the intuitively apparent selection” to favor utilization in increased danger put up ACS sufferers with LDL ranges over 100 mg/dl.
Milton Packer (Baylor Well being) identified that the outcomes will make it harder for firms to check new lipid reducing medication, because the findings diminish the urgency to decrease LDL ldl cholesterol in sufferers with LDL ranges beneath 100 mg/dl. ODYSSEY, he mentioned, could symbolize the tip of the marketing campaign to constantly drive LDL ranges ever decrease.
Sanjay Kaul mentioned that in his opinion, “the trial outcomes don’t transfer the needle for PCSK9 inhibitors! I don’t see how the trial outcomes will encourage the payers to be extra favorably disposed to this drug except after all they’re satisfied/persuaded of the mortality profit!!”
James Stein mentioned that it “is sensible with every thing we all know from pathophysiology and different medical trials” that “folks with increased LDL could have benefited extra.” He mentioned that PCSK9 inhibitors are protected and efficient however that “the problem might be determining the subgroups of who advantages probably the most and convincing payers to cowl this remedy at its present value.”Within the meantime,” mentioned Stein, “I’ll proceed so as to add ezetimbe to excessive dose statin and maximize way of life adjustments, reserving these great new drugs for these with the best LDL values or highest danger.  If their value have been decrease, nonetheless, it might be a no brainer to make use of them way more.  We’ve got confirmed efficacy and security within the medium time period now, so price is the key barrier.”

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