FDA Warns of Serious Liver Risks Linked to Tavneos
FDA has issued a safety alert warning that patients taking Amgen’s Tavneos (avacopan) for a rare autoimmune condition may face a risk of severe liver injury, including cases that have resulted in death. The agency says it has identified postmarketing reports of drug-induced liver injury (DILI) in patients treated with Tavneos, including instances of vanishing bile duct syndrome (VBDS), a rare but potentially irreversible disorder marked by the progressive loss of bile ducts. The condition can disrupt bile flow and lead to permanent liver damage. Symptoms may include jaundice, itching and fatigue.
While liver toxicity was already documented in pre-approval clinical trials and is reflected in the drug’s labeling, the FDA emphasized that the emergence of VBDS and fatal DILI cases represents a new and more serious safety concern, according to a safety alert.
Tavneos is approved for use in combination with glucocorticoids and other therapies to treat adults with severe active anti-neutrophil cytoplasmic autoantibody (ANCA)-associated vasculitis, including granulomatosis with polyangiitis and microscopic polyangiitis — rare diseases characterized by inflammation of small- to medium-sized blood vessels.
Earlier this year, Amgen pushed back against an FDA request asking it to voluntarily withdraw the drug from the U.S. market due to concerns related to clinical trial adjudication and liver safety. In an Amgen notice to healthcare providers, the company says it has no plans to withdraw the 2021-approved drug and is working with the agency to determine a path forward.