“ D-Amphetamine (2.5-4mg/kg, ip), L-dopa (25mg/kg, sc), L-dopa (25mg/kg, sc) plus benserazide (12.5mg/kg, …/kg, ip) plus L-dopa (25mg/kg, sc) and pargyline (50mg/kg, ip) significantly attenuated the antinociceptive effect of quinine (50mg/kg, ip), while … affect quinine antinociception.”