In the US at least yes, it's required to be written in permanent ink.
Yes but it's extremely easy to get, birth control or "the pill" is simply estrogen
yes
It might help, however since the health industry in America wields so much power, good luck getting one. My advice- write your own!
Rx Required. I just picked up my prescription today. Metanx comes in a bottle which states "Rx Only." You do need a prescription.