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Serum LH levels after i.v. administration of 5mg /70 kg nalbuphine and 0.2 mg/kg cocaine. Significant changes from the baseline are indicated by daggers (†, P<0.05). Asterisks (*, P<0.05) indicate points at which LH levels differed between subjects who received 0.2 mg/kg cocaine or a combination of 5 mg/70 kg nalbuphine and 0.2 mg/kg cocaine.
