Volcano of classifying magmatic volcanoes is by their frequency of eruption, with those that erupt regularly called active, those that have erupted in historical times but are now quiet called dormant or inactive, and those that have not erupted in historical times called extinct. However, these popular classifications—extinct in particular—are practically meaningless to scientists. They use classifications which refer to a particular volcano's formative and eruptive processes and resulting shapes. There is no consensus among volcanologists on how to define an "active" volcano. The lifespan of a volcano can vary from months to several million years, making such a distinction sometimes
Dormant therapy Dormant therapy The term “dormant therapy” refers to a new drug or a new biological product which was made the subject of a request for designation in compliance with the Dormant Therapies Act. According to the legislation, the assignment of dormant therapy is given to a drug or new biological product that has been determined to have insufficient patent protection and meets an unmet medical need, improves outcomes, or reduces risks compared to an existing treatment. Many drugs may be abandoned due to their failure to meet a clinical endpoint. Over time, manufacturers wanting to re-investigate the abandoned drug will