(Boehringer Ingelheim) Buscopan Injectable Solution is indicated for the control of abdominal pain (colic) associated with spasmodic colic, flatulent colic, and simple impactions in horses. Buscopan is an antispasmodic (spasmolytic) and anticholinergic drug which suppresses spasms of the digestive system. Each ml of Buscopan Injectable Solution contains 20 mg N-butylscopolammonium bromide. Buscopan Injectable Solution is recommended for intravenous administration at the rate of 1.5 ml per 220 lbs body weight. N-butylscopolammonium bromide.