One can argue all day on the 'right to job' issue, ie. someone should not be barred from a profession for religious reasons. And I would defend that concept completely. However, once you take that job (and it is any job) you have an obligation to fulfill that job as required by your company under its guidelines. It is one thing to say it is OK to wear a headscarf or yamulka or cross, etc at work. This items do not interfere in the performance of your job. Where they do the courts have ruled that it can be requested to eliminate the 'interference'. Refusing to fill certain prescriptions because of your religious beliefs does not fall into the class of 'wearing a turban and being a firefighter where the turban interferes with proper wearing of fire clothing'. If you believe that filling/handing over of that medication is participating in its use and therefore morally objectionable for then move to another job. What 'that' person does with that medication is known of your business and you are interfering.