1. Pentagastrin peptavlon (pentagastrin) 1-2 jug Target organ radiation absorption was low as kg-' h-1 by continuous intravenous infusion in calculated from published nuclear data on 99mTc normal saline in nine subjects. In three subjects the (Dillman, 1970) and data for absorbed fraction and rate of infusion was doubled to 2-4 /g kg-' h-1, 40 organ masses;(Snyder et al; The estimates minutes after the commencement of the infusion,1969