Amphastar plans this month to begin what it expects to be its final study to support an NDA to relaunch Primatene Mist. If the results support accurate self-selection and usage of the product by consumers, Amphastar should be ready to re-submit the NDA during the current quarter.

Amphastar plans this month to begin what it expects to be its final study to support an NDA to relaunch Primatene Mist. If the results support accurate self-selection and usage of the product by consumers, Amphastar should be ready to re-submit the NDA during the current quarter.

Second FDA complete response letter for a reformulated Primatene Mist likely pushes back by another 18 months Amphastar's potential relaunch of the OTC product after satisfying the US agency's concerns about consumers correcting using the product without a doctor’s intervention.

Second FDA complete response letter for a reformulated Primatene Mist likely pushes back by another 18 months Amphastar's potential relaunch of the OTC product after satisfying the US agency's concerns about consumers correcting using the product without a doctor’s intervention.