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Journal of Clinical Endocrinology & Metabolism, Vol 68, 752-756, Copyright © 1989 by Endocrine Society


ARTICLES

Somatostatin analog octreotide (SMS 201-995) prevents the decrease in blood pressure after oral glucose loading in the elderly

RW Jansen, TL Peeters, JW Lenders, HJ van Lier, A v't Laar and WH Hoefnagels
Department of Geriatric Medicine.

In elderly subjects blood pressure (BP) may fall after a meal. The mechanism of this phenomenon is unknown, but it has been suggested that it may be mediated by insulin and/or vasoactive gut hormones. We studied in normo- and hypertensive elderly subjects the effects of the synthetic long-acting somatostatin analog octreotide (SMS 201-995) on the BP reduction that follows oral glucose administration in subjects who are recumbent and on their postglucose plasma vasoactive intestinal polypeptide (VIP) and insulin concentrations. After placebo treatment, mean arterial pressure fell by 15 +/- 1 mm Hg (P less than 0.001) in the 10 hypertensive subjects and by 7 +/- 2 mm Hg (P less than 0.01) in the 10 normotensive subjects. In contrast, when 50 micrograms octreotide were given sc, BP did not change significantly in either group. Oral glucose did not induce a rise in plasma VIP after either octreotide or placebo administration. The postglucose rises in plasma glucose concentrations were similar after octreotide and placebo treatments in both groups. After placebo administration the postglucose plasma insulin levels increased from 79 to 519 pmol/L in the hypertensive subjects and from 63 to 464 pmol/L in the normotensive subjects, whereas after octreotide treatment plasma insulin increased little in either group. These data indicate that treatment with octreotide holds promise for patients with symptomatic postprandial hypotension, and that VIP does not seem to play a role in this phenomenon.


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