This information is in follow-up to the FDA Drug Safety Communication: FDA asks manufacturer of the leukemia drug Iclusig (ponatinib) to suspend marketing and sales that was issued on October 31, 2013 , and updated on November 5, 2013 .
[12-20-2013] The U.S. Food and Drug Administration (FDA) is requiring several new safety measures for the leukemia drug Iclusig (ponatinib) to address the risk of life-threatening blood clots and severe narrowing of blood vessels. Once these new safety measures are in place, the manufacturer of Iclusig is expected to resume marketing to appropriate patients. Health care professionals should review these additional safety measures and carefully consider them when evaluating the risks and benefits of Iclusig for each patient.
The required safety measures involve label changes to narrow the indication, provide additional warnings and precautions about the risk of blood clots and severe narrowing of blood vessels, revise recommendations about dosage and administration of Iclusig, and update the patient Medication Guide. We are also requiring a risk evaluation and mitigation strategy (REMS). In addition, the manufacturer of Iclusig, ARIAD Pharmaceuticals, must conduct postmarket investigations to further characterize the drug’s safety and dosing.
On October 31, 2013, FDA requested and ARIAD agreed to voluntarily suspend marketing of Iclusig. FDA’s request resulted from FDA’s investigation, which revealed a steady increase in the number of serious vascular occlusion events identified through continued safety monitoring of the drug. This observation represented a significant change in the safety profile of Iclusig as the proportion of patients on the drug experiencing vascular occlusion events such as blood clots and severe narrowing of blood vessels was significantly greater than the proportion reported at the time of its approval in December 2012 (see Data Summary).
During the marketing suspension, Iclusig treatment has been available through single patient or emergency investigational new drug applications (INDs). Patients should continue to receive Iclusig under their authorized IND until marketing of Iclusig is resumed. FDA is working closely with ARIAD on the new safety measures and anticipates these will be in place by the end of January 2014. Once that process is complete, patients being treated under these INDs can be transitioned back to receiving the marketed Iclusig product.
In more detail, the new safety measures for Iclusig include the following:
We urge health care professionals and patients to report side effects involving Iclusig to the FDA MedWatch program, using the information in the “Contact FDA” box at the bottom of this page.
Additional Information for Patients and Caregivers
Additional Information for Health Care Professionals
As a result of the postmarket safety monitoring of Iclusig (including through postmarket reports and ongoing trials), FDA identified a significant change in the safety profile of Iclusig. Arterial and venous thrombosis and occlusions have occurred in at least 27% of Iclusig-treated patients from the phase 1 and phase 2 trials. These adverse events have included fatal myocardial infarction, stroke, stenosis of large arterial vessels of the brain, severe peripheral vascular disease, and the need for urgent revascularization procedures. We noted an increasing number of these serious vascular occlusion events as compared to those noted at the time of approval, which our analyses suggest are linked to the drug rather to than other factors.
We held multiple meetings with the sponsor, ARIAD Pharmaceuticals, to discuss these serious vascular occlusion events and recommended ARIAD review all cases of vascular occlusion events that occurred in patients treated with Iclusig. This review provided clarity with regard to the frequency and characterization of these events.
In addition, FDA conducted an independent data analysis of vascular occlusion events which included heart attack, stroke, extremity necrosis, and pulmonary embolism. These serious events occurred in those patients with and without established risk factors and in all age ranges. The cumulative number of vascular events was shown to increase with longer use of Iclusig. The rate of vascular occlusions also exceeded that of other drugs in the same class (e.g., imatinib, dasatinib, nilotinib, and bosutinib).
ARIAD announced termination of the EPIC (Evaluation of Ponatinib versus Imatinib in Chronic Myeloid Leukemia) trial on October 18, 2013. EPIC was a phase 3 trial comparing Iclusig to imatinib in the initial treatment of patients with chronic myeloid leukemia. The decision to terminate the trial was because of an excessive number of observed vascular occlusion events in patients treated with Iclusig. FDA agreed with the decision, in part, because of the availability of multiple alternative first-line treatments (imatinib, dasatinib, and nilotinib).
Previous reports of vascular occlusion events have tried to link events to either Iclusig or an underlying disease process. In its investigation, FDA included all vascular occlusion events, including those considered by investigator-led analyses as not related to the drug, in an effort to prevent the introduction of potential bias as these trials were unblinded and not randomized. The magnitude and timing of the vascular occlusion events, and the safety findings from the terminated EPIC trial, have provided increasing evidence of the relationship between Iclusig and arterial and venous vascular occlusion events.