GastroGard (omeprazole) Oral Paste. Box of 7 syringes. Exclusive manufacturer rebates available when purchased through a veterinarian. Buy 14 tubes, get $56 back. Buy 28 tubes, get $168 back. Buy 72 tubes, get $432 back. Go to BoehringerIngelheimEquineRebates.com to complete the rebate form online.