When Temazepam (a benzo and after that failure I am not using any benzos anymore) stopped working for sleep, a covering p-doc saw me next day, but I made it clear on the phone that not being to sleep is a complete emergency and if they do not want to fax a new prescription to the pharmacy, they need to see me urgently. The doctor who covered for my p-doc was very nice and the drug he prescribed (at my request) still works, unlike Temazepam.