FDA OKs First Oral Therapy for Rare Adrenal Tumors
FDA has approved a Merck NDA for Welireg (belzutifan), an oral drug for treating adults and pediatric patients aged 12 and older with locally advanced, unresectable, or metastatic pheochromocytoma or paraganglioma (PPGL), which are rare neuroendocrine tumors. The approval marks a significant advance in the treatment of PPGL, offering a non-invasive option for patients whose tumors cannot be removed surgically or treated with curative intent.
Approval was based on results from the LITESPARK-015 trial involving 72 patients with PPGL who had advanced or metastatic disease and had previously exhausted surgical or curative treatment options, according to an FDA release. Key findings showed an objective response rate of 26% and a median duration of response of 20.4 months, it says.
FDA says that common side effects reported in at least a quarter of patients included anemia, fatigue, musculoskeletal pain, and various laboratory abnormalities such as elevated liver enzymes and changes in blood cell counts.