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Desmopressin (1-deamino-8-D-arginine vasopressin) is a synthetic form of the normal human hormone arginine vasopressin (the antidiuretic hormone, or ADH), a peptide containing nine amino acids. Compared to vasopressin, desmopressin's first amino acid has been deaminated , and the arginine at the eighth position is in the dextro rather than the ...
If there is no change in the water loss despite fluid deprivation, desmopressin may be administered to distinguish between the two types of diabetes insipidus which are central & nephrogenic diabetes insipidus. The time of deprivation may vary from 4 to 18 hours. [2] The serum osmolality and urine osmolality are both measured in the test.
This is a two-step test where parenteral desmopressin is administered after an initial 8-hour water fast. [10] The first step is designed to differentiate primary polydipsia from diabetes insipidus. The second part of the test helps differentiate central diabetes insipidus from nephrogenic diabetes insipidus. [8]
Treatment involves drinking sufficient fluids to prevent dehydration. [1] Other treatments depend on the type. [1] In central and gestational DI, treatment is with desmopressin. [1] Nephrogenic DI may be treated by addressing the underlying cause or by the use of a thiazide, aspirin or ibuprofen. [1]
The "vaptan" drugs act by directly blocking the action of vasopressin at its receptors (V 1A, V 1B and V 2).These receptors have a variety of functions, with the V 1A and V 2 receptors are expressed peripherally and involved in the modulation of blood pressure and kidney function respectively, while the V 1A and V 1B receptors are expressed in the central nervous system.
Routes of administration are usually classified by application location (or exposition). The route or course the active substance takes from application location to the location where it has its target effect is usually rather a matter of pharmacokinetics (concerning the processes of uptake, distribution, and elimination of drugs).
Desmopressin rapidly improves short-term memory and enhances memory imprinting. Desmopressin is sometimes used for the treatment of diabetes insipidus, a condition of frequent urination and extreme thirst. In some countries, Desmopressin is used for amnesia and to treat narcotic-related mental problems.
Medications can be administered in different ways, such as by mouth, by infusion into a vein, or by drops put into the ear or eye. A medication that does not contain an active ingredient and is used in research studies is called a placebo. [4] In Europe, the term is "medicinal product", and it is defined by EU law as: