... several years, and his worked switched providers. They insisted that he try generics before they would approve the Sanctura. It took 6 months to get it approved. He had previously tried 4 generics and they didn't work as well as Sanctura. He was starting to have a lot of discomfort. Finally we got the Sanctura approved. He's been on it a week and is still having discomfort. How long does it take for this to be effective? Thank you