offspring of mothers treated with morphine ( 7.5 mg/kg twice daily , s.c. ) or saline during pregnancy , and infants from untreated mothers given morphine ( 5 mg/kg ) , naltrexone ( 10 mg/kg ) or saline subcutaneously on postnatal days 1-5 , were tested at days 10 , 12 and 14 for deprivation-induced milk consumption following an acute dose of naloxone ( 1 or 5 mg/kg , i.p . ) .
C0027360
naltrexone
C0027358
naloxone