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Trending Topics & Drug Approvals: May 2026

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May 31, 2026

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Avacopan (Tavneos) update

The Food and Drug Administration (FDA) Center for Drug Evaluation and Research (CDER) has proposed that avacopan oral capsule (Tavneos) be withdrawn from commercialization in the United States. This conclusion is based on recent evidence indicating that Tavneos has not demonstrated efficacy for its FDA-approved indication, and because it has been determined that false statements were included in its initial approval application. Tavneos is a complement 5a receptor (C5aR) antagonist that was approved in 2021 as an adjunctive treatment for adults with severe active anti-neutrophil cytoplasmic autoantibody (ANCA)-associated vasculitis (granulomatosis with polyangiitis [GPA] and microscopic polyangiitis [MPA]), in combination with standard therapy including glucocorticoids.

In January 2026, the FDA requested that ChemoCentryx (a subsidiary of Amgen) voluntarily withdraw Tavneos. This request was based on concerns regarding re-adjudication of nine patients in the ADVOCATE trial (n=331). According to the FDA, unblinded staff involved in the clinical trial altered the results to make the drug appear effective, even though the original analysis did not support this outcome. At the end of January, Amgen stated it did not intend to withdraw Tavneos from commercialization and was unaware of any patient data issues. Furthermore, the manufacturer confirmed ongoing support for Tavneos as an effective treatment for ANCA-associated vasculitis. 

The FDA also stated ChemoCentryx violated FDA regulations by not submitting the original analysis as part of the initial approval application. Based on the findings, CDER has concluded they cannot support that Tavneos is effective for the FDA-approved use. A notice of opportunity for a hearing (NOOH) has been issued by the FDA to ChemoCentryx. Additionally, a Drug Safety Communication was issued by the FDA in March 2026 regarding concerns of serious drug-induced liver injury (DILI). Tavneos will remain commercially available until the manufacturer decides to remove it from market or the FDA Commissioner mandates its removal. If ChemoCentryx requests a hearing, the FDA Commissioner will evaluate the necessity of conducting a public hearing. After the hearing (if deemed necessary) concludes, the Commissioner will then determine the withdrawal of Tavneos. Amgen has published a FAQ stating Tavneos remains commercially available and there is no change to its approval status, use or availability. 

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