The US FDA last week placed clinical holds on the testing of two separate investigational anti-nerve growth factor (NGF) pain drugs under development by Johnson & Johnson and Regeneron Pharmaceuticals and its partner Sanofi-Aventis after a case of avascular necrosis of a joint was confirmed in a clinical trial participant.
The suspensions follow a clinical hold imposed by US regulators in June on Pfizer's experimental anti-NGF compound tanezumab after a...






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