Noqturina (Desmopressin)

Desmopressin acts on the antidiuretic hormone pathway to reduce urine output and increase coagulation factor levels.

• Central diabetes insipidus: reduces excessive urine production and stabilizes fluid balance.
• Nocturnal enuresis: decreases nighttime bladder emptying episodes in children and adults.
• Hemophilia A: raises plasma factor VIII levels to improve clotting.
• von Willebrand disease: elevates von Willebrand factor to enhance platelet adhesion.

• Desmopressin is a synthetic vasopressin analogue that selectively binds V2 receptors on the renal collecting duct cells, stimulating adenylate cyclase and increasing cyclic AMP. This promotes insertion of aquaporin‑2 water channels into the apical membrane, enhancing water reabsorption. In addition, it stimulates release of factor VIII and von Willebrand factor from endothelial cells, improving haemostatic function.

Desmopressin may cause a range of adverse reactions, varying from mild to serious.

Common Side Effects

• Headache: mild to moderate pain in the head.
• Nasal congestion: feeling of a blocked nose.
• Nausea: upset stomach or urge to vomit.
• Hyponatremia: low blood sodium, usually mild.

Serious or Rare Side Effects

• Severe hyponatremia with seizures: dangerous drop in sodium causing neurological symptoms.
• Thrombotic events: blood clot formation in veins or arteries.
• Allergic reaction: rash, itching, swelling, or difficulty breathing.
• Water intoxication: excessive water retention leading to swelling.

Before initiating therapy, clinicians should consider several safety measures.

• Assess fluid balance: monitor urine output and body weight regularly.
• Check serum sodium: evaluate electrolytes before initiating therapy and during treatment.
• Limit fluid intake: advise patients to restrict excessive water consumption while on medication.
• Use with caution in renal impairment: adjust monitoring for patients with reduced kidney function.
• Avoid in uncontrolled hypertension: evaluate blood pressure before prescribing.
• Store at room temperature: keep below 25°C in the original packaging, protect from moisture.

Desmopressin can interact with other medicines, requiring attention to avoid harmful effects.

Major Interactions (Avoid)

• Concomitant use of thiazide diuretics: may potentiate hyponatremia.
• NSAIDs (e.g., ibuprofen, naproxen): increase risk of water retention and low sodium.
• Antidepressants that affect serotonin (e.g., SSRIs): can exacerbate hyponatremia.

Moderate Interactions (Monitor Closely)

• Anticoagulants (e.g., warfarin): desmopressin may affect bleeding risk.
• CYP450 substrates: although desmopressin is not metabolized extensively, monitor for unexpected effects.
• Alcohol: may enhance central nervous system effects and fluid balance changes.