Planned Parenthood has recently described a pharmacist's refusal to fill a prescription for an abortifacient as as "criminal." Apparently, they believe that not only should abortion be available on demand, but that people who object to it should be forced to carry it out. Everything else aside, the pharmacy is a business, and as such has the right to refuse service to anyone for any reason. Epsecially in this case, where the "business" in question is morally reprehensible to the pharmacist working there. The customer, likewise, has the "right" to choose to take her business somewhere else. A part of this give-and-take relationship between the two is that (in this case) the company's policy required that the pharmacist help the patient find another store where the prescription may be filled "without delay." Forcing the pharmacist to dispense a pill that will cause an abortion is morally equivalent to forcing the owner of a sporting goods store to sell a handgun to a customer knowing that the customer has a short temper and a pension for fighting.
In some ways, it's worse even, because there is no actual gaurantee that the customer who is buying the gun is actually intending to kill someone, or may be intending to do so only hypothetically at some future time and in self-defense. The owner of the store knows that he is taking a risk in selling the gun, but it is a calculable risk; the gun may never be used, or may be used only as a last resort. He may even be intending to use it just for home defense. There is no actual gaurantee that the gun will be used to kill someone and let alone that it will be used to kill someone in agression.
The woman who is asking for the pill will certainly use it to kill her unborn child- there is no hypothetical future use for the pill, it serves only one purpose, namely to kill the unborn child. Giving the pill to her basically gaurantees that it will be used to agressively end another's life.
Demanding that a person go against his or her conscience is a dangerous road for a society to take. It's a short step from making these demands to erasing that part of a society's conscience. In cases where abortion is involved, the part of the conscience being attacked is the part which says that killing another human being is wrong. That's a very dangerous part of a society's conscience to lose.