“We found in the FST that pretreatment with L-arginine (500 mg/kg) counteracted the antidepressant-like effect of imipramine (IMI, 15 mg/kg) and venlafaxine (VENL, 6 mg/kg), but not the effects of bupropion (BUPR, 20mg/kg) or fluoxetine (FLX, 20mg/kg).”