alexa Pharmacokinetics of 1-deamino-8-D-arginine vasopressin after various routes of administration in healthy volunteers.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Diabetes & Metabolism

Author(s): FjellestadPaulsen A, Hglund P, Lundin S, Paulsen O

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Abstract OBJECTIVE: We investigated the pharmacokinetics and biological effects of 1-deamino-8-D-arginine vasopressin (dDAVP) in healthy adults after intravenous, subcutaneous, intranasal, peroral, sublingual and intrarectal administration. DESIGN: Eight normal volunteers were studied over an 8-hour period after each drug administration, separated by at least one week. For intravenous and subcutaneous administration, the subjects received 2 micrograms of dDAVP. The intranasal and sublingual doses were 20 micrograms and the rectal dose was 50 micrograms. Oral administration of dDAVP was effected with a 200-micrograms tablet. MEASUREMENTS: Plasma and urinary levels of dDAVP were measured using a specific and sensitive radioimmunoassay. RESULTS: A significant increase of urine osmolality was observed after all routes of administration, except the sublingual and intrarectal for up to 8 hours after administration. After intravenous administration, the half-life of elimination (t1/2) of dDAVP was 78 +/- 10 minutes. An extensive adsorption of dDAVP to the plastic syringe was found with intravenous but not with subcutaneous administration. Using the area under the curve of dDAVP from the subcutaneous administration as a reference, bioavailability was found to be 3.4\% after intranasal administration and 0.1\% after oral administration. After sublingual and intrarectal routes of administration no detectable dDAVP was found in the blood; however, low amounts were found in the total 24-hour urine. CONCLUSION: The bioavailability of dDAVP seems lower than previously reported after intranasal and oral administration.
This article was published in Clin Endocrinol (Oxf) and referenced in Journal of Diabetes & Metabolism

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