What you propose sounds rather dangerous to me; they'd be making a clinical judgement, and depriving a patient of a physician-prescribed medication, presumably to treat an illness, all without having medical training, access to the patient's medical history, or so much as having examined them.

I have seen a community prescription for 10mg oxycodone bd, increasing up to 200mg bd if needed within the first month, for an opioid-naive patient. There was no way I was going to dispense that prescription. In my country, I have legal responsibility along with the doctor (or other prescriber) for the safety of any prescription I supply, and pharmacists have been successfully prosecuted for dispensing unsafe prescriptions. As far as I know, it's the case across the EU that a pharmacist can refuse to supply a medication if it is unsafe. That's totally separate from any kinds of "conscience clause" countries might have allowing people to refuse to dispense things like contraception.