guaifenesin injection Published on July 22, 2022 in Guaifenesin 50mg/ml Parenteral Injection Compounded for dogs and horses.Full resolution (1836 × 2560) Guaifenesin 50mg/ml Parenteral Injection Compounded for dogs and horses. Guaifenesin 50mg/ml Parenteral Injection Compounded for dogs and horses.