Hi TTS,
It definitely sounds like something in the Par brand doesn't agree with you. If your insurance offers a mail order service, the pharmacy would probably be a large operation out-of-state. If so, you could check with them. These companies also usually have a lower co-pay and let you get up to 3 months of a supply at one time if your RX is written for 3 months.
Otherwise, you might want to call customer service at Sandoz and see what the best way would be to still get Sandoz. They could at least tell you of a pharmacy that carries it. Good luck, Elaine