Do some Internet research. There are numerous instances of pharmacist's assistants refusing to fill a woman's prescription for contraceptives, being warned or being fired for not doing their assigned duties, and suing the pharmacy for religious discrimination.
If a pharmacy makes a business choice to not carry contraception, that's their privilege as a business. But if a pharmacy chooses to carry contraception drugs, the owner or manager should expect the assistant to fill a woman's prescription, UNLESS (I miss the ability to use italics) the assistant informed management in advance.
The battle to ban abortion for lower-and-working class women is almost won (rich and middle-class women will always have the ability to obtain a legal abortion).
Now the battle is over women's contraception.