To be honest, I don't think it really matters. Unless the pharmacist really has it out for you and keeps up with your prescription timestamps (i.e. the hour, minute, and second you actually exchange money for the prescription) with respect to the daily dosing instructions (i.e. AM/PM), then I would imagine your pharmacist him/herself probably couldn't answer this question without first consulting your state's pharmacy law handbook. You'd have to have a really sore history with substance abuse for your pharmacist to split hairs over something like this. You could always call your pharmacy and ask, though (or if it's a chain retail pharmacy, you could probably send an anonymous email and get a response by email if you want to avoid seeming a little too interested in the matter, if you catch my drift).