RT Journal Article SR Electronic T1 The effect of pregnancy and lactation on the elimination of methadone in guinea pigs. JF Drug Metabolism and Disposition JO Drug Metab Dispos FD American Society for Pharmacology and Experimental Therapeutics SP 170 OP 171 VO 9 IS 2 A1 R C Pak A1 D J Ecobichon YR 1981 UL http://dmd.aspetjournals.org/content/9/2/170.abstract AB