I think Joseph is talking about times when you want to insure that the patient goes to a particular pharmacy, especially as Jon is making scripts that can be tamper proof. (I think). And, I shouldn't speak for Joseph, but this has come up before.
Also, there is a field in demographics where you can enter what pharmacy the patient prefers. This is of little help when you are busy. It shouldn't automatically populate the actual script, but it would be nice if it popped up in case you needed it.
This would serve two purposes. One, if there is a time that you need to fax/call in a script and you can't get hold of the patient again (say someone forgot to get the name of the pharmacy), you can at least have some idea. PLUS, if you do fax your scripts, and you say to a patient (especially a healthy one who hasn't been in for six months), "I can fax this for you. You use Riteaid on Main St, correct," which will impress some patients.