[Sloth]

Would you throw a Jew in the gas chamber knowing that refusing to wouldn't have stopped Hitler from committing genocide?

Uh, you're changing the subject. You originally asked whether one should not steal in order to prevent murder; however, even if one stipulates that the use of oral contraceptives is murder, you must also consider the likelihood that one's act of stealing will actually prevent it -- in this case, nearly zero.

So you should have asked whether one is justified in stealing to make murder slightly less convenient.

[DannyTN]

"Uh, you're changing the subject. ... you must also consider the likelihood that one's act of stealing will actually prevent it -- in this case, nearly zero"

No, I'm not. The pharmacist doesn't need to consider whether his act will prevent the murder. He just has to know that he doesn't want to facilitate it in any way.

In that respect, it's just like the Hitler guard. His choice is to facilitate the murder or not to. Whether it will prevent it has no bearing on the decision.