This can happen a lot more frequently than you would imagine - especially if we're talking about HIV drugs. For me personally, I get my medications filled at my local hospital's pharmacy and I have become such a regular now that they know to order my medications so that they are ready for me by fill date.

I would always suggest to call a week before your prescriptions are due just so that they have time to order them and get them processed for you.

I do order ahead of time. But every month I have issues. It's either out of stock and needs to be ordered. I've had to go to my Dr. Several times for sample packages of my script.

yea it can happen. Especially if you're dealing with a local pharmacy in an area with a high HIV concentration. I get mine from a hospital pharmacy. But it's pretty hit at my neighborhood pharmacy.

I always make sure my pharmacy has 6 months of hiv medication in stock around 2 weeks before my doctor issues my 6 month prescription.