👤 By the CinnaRN Clinical Content Team🕐 Updated 2026-08-23🏷️ Pharmacological Therapies🔖 Free to read, print, and share
Also known as: DDAVP · synthetic ADH · antidiuretic hormone · vasopressin analog
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Use this quick-reference guide to spot, treat, and prevent Desmopressin (DDAVP) on the NCLEX. Keep it handy during review and on exam day!
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📒 The 1-minute cheat sheet
📌 Use
Diabetes insipidus (central)
Nocturnal enuresis, von Willebrand
📌 Mech
↑ water reabsorption (kidney)
↓ urine output, ↑ concentration
🧪 Monitor
I&O, daily weight
Serum Na+, urine sp. gravity
🚩 Report
Water intoxication → ↓Na+
HA, confusion, seizures
Limit fluids per order
📚 Desmopressin (DDAVP) — full study notes
The cheat sheet above is your quick recall card. These notes go deeper — what it is, what to do first, what must be reported, and what to teach.
Desmopressin is a synthetic analog of antidiuretic hormone (ADH/vasopressin) used primarily to treat diabetes insipidus, where the body cannot conserve water. It promotes water reabsorption in the kidneys, decreasing urine output and concentrating the urine. It is also used for nocturnal enuresis and certain bleeding disorders (von Willebrand disease, mild hemophilia A). The main danger is water intoxication and hyponatremia.
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Key points
Understand these first
Synthetic ADH that increases water reabsorption in the renal collecting ducts, reducing urine output in diabetes insipidus.
Effectiveness is shown by decreased urine output, increased urine specific gravity, and decreased serum osmolality toward normal.
Major adverse effect is water intoxication leading to hyponatremia (headache, confusion, seizures).
Also used for von Willebrand disease and mild hemophilia A because it raises factor VIII and von Willebrand factor.
Available intranasally, orally, subcutaneously, and IV; nasal route can be affected by congestion or rhinitis.
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Nursing priorities
What to do, in order
Monitor strict intake and output, daily weight, and urine specific gravity to evaluate response.
Monitor serum sodium and assess for signs of water intoxication (headache, confusion, lethargy).
Restrict excessive fluid intake to prevent dilutional hyponatremia.
Teach correct intranasal administration technique and timing.
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Red flags — report now
Escalate immediately
Signs of water intoxication/hyponatremia — headache, drowsiness, confusion, or seizures; report immediately.
Sudden weight gain with decreased urine output — fluid overload; report now.
Never encourage extra fluids beyond thirst, as overhydration causes dangerous hyponatremia.
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Labs & values
Numbers to know
Serum sodium 135-145 mEq/L (watch for hyponatremia)
Urine specific gravity 1.005-1.030 (rises with effective therapy)
Serum osmolality 275-295 mOsm/kg
Urine osmolality (increases with effective therapy)
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Patient teaching
What patients must know
Weigh yourself daily and report rapid weight gain.
Report headache, confusion, drowsiness, or any seizure activity immediately.
Do not drink large amounts of extra fluid; drink to satisfy thirst only.
For nasal spray, clear nasal passages and use correct technique; report congestion that may reduce absorption.
Carry medical identification and do not skip doses for diabetes insipidus.
❓ Desmopressin (DDAVP): NCLEX FAQs
What are the priority nursing interventions for Desmopressin (DDAVP)?
Monitor strict intake and output, daily weight, and urine specific gravity to evaluate response. Monitor serum sodium and assess for signs of water intoxication (headache, confusion, lethargy). Restrict excessive fluid intake to prevent dilutional hyponatremia. Teach correct intranasal administration technique and timing.
What are the warning signs of Desmopressin (DDAVP) a nurse must report?
Signs of water intoxication/hyponatremia — headache, drowsiness, confusion, or seizures; report immediately. Sudden weight gain with decreased urine output — fluid overload; report now. Never encourage extra fluids beyond thirst, as overhydration causes dangerous hyponatremia.
What do I need to know about Desmopressin (DDAVP) for the NCLEX?
Synthetic ADH that increases water reabsorption in the renal collecting ducts, reducing urine output in diabetes insipidus. Effectiveness is shown by decreased urine output, increased urine specific gravity, and decreased serum osmolality toward normal. Major adverse effect is water intoxication leading to hyponatremia (headache, confusion, seizures). Also used for von Willebrand disease and mild hemophilia A because it raises factor VIII and von Willebrand factor.
What patient teaching is important for Desmopressin (DDAVP)?
Weigh yourself daily and report rapid weight gain. Report headache, confusion, drowsiness, or any seizure activity immediately. Do not drink large amounts of extra fluid; drink to satisfy thirst only. For nasal spray, clear nasal passages and use correct technique; report congestion that may reduce absorption.
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Quick Tip
Synthetic ADH that increases water reabsorption in the renal collecting ducts, reducing urine output in diabetes insipidus.