Desmopressin (DDAVP)
A synthetic analogue of the antidiuretic hormone vasopressin, selective for the V2 receptor. Widely licensed for central diabetes insipidus, nocturnal enuresis, nocturia, and certain bleeding disorders (mild haemophilia A, von Willebrand disease). Available as tablet, nasal spray and injection.
01 Overview
Desmopressin (1-deamino-8-D-arginine vasopressin, DDAVP) is engineered from vasopressin to retain antidiuretic V2 activity while minimising the vasoconstrictive V1 effect and extending duration. It concentrates urine by promoting renal water reabsorption and also raises circulating factor VIII and von Willebrand factor, which underlies its haemostatic use.
It is a well-characterised, long-marketed drug with clear indications and dosing across intranasal, oral and parenteral routes. Its principal hazard is dilutional hyponatraemia if fluid intake is not controlled, which is the main reason for careful patient selection and sodium monitoring.
02 Mechanism
Selective agonist at renal V2 vasopressin receptors, increasing aquaporin-2 insertion and water reabsorption; also releases factor VIII / von Willebrand factor from endothelium.
03 Dosing
| Tier | Dose | Route | Notes |
|---|---|---|---|
| Parenteral / haemostatic | 1–4 mcg | SubQ | Injection for DI or to raise factor VIII in mild bleeding disorders. |
| Central diabetes insipidus | 10–40 mcg/day | Insufflated | Divided doses; titrated to urine output. |
04 Effects
| Effect | Magnitude | Evidence | |
|---|---|---|---|
| Reduced urine outputCorrects excessive water loss in central diabetes insipidus and reduces night-time voiding. | Concentrated urine, controlled polyuria | Clinical | |
| Improved haemostasisTransiently boosts clotting factors in mild haemophilia A and von Willebrand disease. | 2-4x rise in factor VIII/vWF | Clinical |
05 Side effects
| Effect | Severity | Frequency | Evidence | Countermeasures |
|---|---|---|---|---|
| HyponatraemiaWater retention can lower serum sodium, causing headache, confusion or seizures if severe. | Severe | Uncommon; dose/fluid dependent | Clinical | |
| Headache and nauseaMild headache, nausea or abdominal discomfort, sometimes an early sign of low sodium. | Mild | Common | Clinical | |
| Nasal irritation (intranasal route)Local nasal congestion or irritation with nasal formulations. | Mild | Common with spray | Clinical |