What are the actions done by morphine?

Analgesia (no loss of conscious, relieve pain by raising pain threshold and altering perception, sense of euphoria) Histamine Release (cause urticaria, sweat, vasodilation, bronchoconstriction) Respiration (resp depression most common cause of death, tolerance quickly w/repeated exposure, depresses cough reflex) Miosis (enhanced parasymp eye stimulation) GI (Emesis, opioid induced constipation [inc tone and dec motility], increased biliary tract pressure [gallbladder contract]) CV (large dose: hypotension, bradycardia, CI in brain injury) Hormone (increase PRL, GH, ADH) Labor (prolongs stage 2 of labor)