You can always ask. I have to take a certain brand of my generic Trileptal that I think I can only get at Target pharmacy. At least thats where I keep going. When I moved and they gave me another brand, I requested that particular brand and now they order it for me when I pick up refills. I think it's on file or something now, because I will bring it back if it's wrong. I got a headache with another brand, so I don't take chances now.