The use of Immobilon.
D000700:Analgesics / Q000009:adverse effects* / Q000037:antagonists & inhibitors; D000818:Animals; D002369:Castration; D006734:Horse Diseases / Q000139:chemically induced*; D006736:Horses; D008297:Male; D009019:Morphinans / Q000009:adverse effects* / Q000037:antagonists & inhibitors; D013035:Spasm / Q000139:chemically induced; D013610:Tachycardia / Q000139:chemically induced
D000700:Analgesics; D009019:Morphinans