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Three different analgesic treatments were compared: (C) 5 mg/kg carprofen (s.c. injection 30 min before surgery), (T) 45 mg/kg tramadol i.p. injection 15 min before surgery). (CT) Pre-treatment with 5 mg/kg of carprofen (30 min before surgery) and 2 i.p. injections of tramadol 45 mg/kg each (immediately after recovery of post-surgical mobility, then 1 hour later).
