With few exceptions, you should be able to ask your MD for a 90 day supply with 3 refills (enough for 3 months immediately, with refills for the rest of the year).
But the exceptions are the things you really don’t want to be running out of. Which is extremely unfortunate and silly given that those who want to source these things illicitly will do so and those who follow the rules will suffer.
Not sure what you're referring to. I'm thinking of medications like injectables, which may not have a sufficient shelf life to permit getting the full set of supplies all at once. But most of the medications which are life-threatening if withheld (e.g., antiplatelet medications after a stent) can be obtained in bulk with a normal prescription.
I was thinking of Adderall specifically but in the case of Benzodiazepines, withdrawals can be fatal and they’re controlled substances so presumably ineligible for the 3 months prescription.
Yes, I agree; while benzodiazepines are not generally considered life-saving medications, they can be life-threatening (like alcohol) if high tolerance is developed and cessation is abrupt.