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12 Feb 2019

FDA approved Cablivi (caplacizumab-yhdp) for the treatment of adult patients with acquired thrombotic thrombocytopenic purpura

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The USFDA approved Cablivi (caplacizumab-yhdp) injection, the first therapy specifically indicated, in combination with plasma exchange and immunosuppressive therapy, for the treatment of adult patients with acquired thrombotic thrombocytopenic purpura (aTTP), a rare and life-threatening disorder that causes blood clotting.

“Patients with aTTP endure hours of treatment with daily plasma exchange, which requires being attached to a machine that takes blood out of the body and mixes it with donated plasma and then returns it to the body. Even after days or weeks of this treatment, as well as taking drugs that suppress the immune system, many patients will have a recurrence of aTTP. Cablivi is the first targeted treatment that inhibits the formation of blood clots. It provides a new treatment option for patients that may reduce recurrences.”


Richard Pazdur, M.D., director of the FDA’s Oncology Center of Excellence and acting director of the Office of Hematology and Oncology Products in the FDA’s Center for Drug Evaluation and Research

Clinical Trial

  • The efficacy of Cablivi was studied in a clinical trial of 145 patients who were randomized to receive either Cablivi or a placebo.
  • Patients in both groups received the current standard of care of plasma exchange and immunosuppressive therapy.
  • The results of the trial demonstrated that platelet counts improved faster among patients treated with Cablivi, compared to placebo.
  • Treatment with Cablivi also resulted in a lower total number of patients with either aTTP-related death and recurrence of aTTP during the treatment period, or at least one treatment-emergent major thrombotic event (where blood clots form inside a blood vessel and may then break free to travel throughout the body).
  • The proportion of patients with a recurrence of aTTP in the overall study period (the drug treatment period plus a 28-day follow-up period after discontinuation of drug treatment) was lower in the Cablivi group (13 percent) compared to the placebo group (38 percent), a finding that was statistically significant.

The FDA granted this application Priority Review designation. Cablivi also received Orphan Drug designation, which provides incentives to assist and encourage the development of drugs for rare diseases.

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