There are many different prenatal vitamins available, and a pharmacy cannot possibly stock every single brand. If your pharmacy does not carry PremesisRx prenatal vitamins, you have a few different options. You can take your prescription (or have it transferred) to a different pharmacy that carries PremesisRx, you can have your healthcare provider give you a prescription for a different prenatal vitamin, or you can ask your pharmacy to stock PremesisRx for you.