Abstract
Desmopressin is a long-established treatment for nocturnal enuresis with clear guidelines regarding its usage. A sex difference in renal sensitivity has recently been reported in adults. The objective of this study was to investigate real-life desmopressin prescription in the Danish pediatric population, and prescription patterns which may reflect a sex difference in pediatric usage. Formulation, dose, treatment duration, and safety (hyponatremia) were investigated. 40,596 children received 214,220 desmopressin prescriptions between 2004 and 2011 in the Danish National Prescription Registry. Data were linked to hyponatremia diagnoses from the National Patient Registry. Although the lowest recommended dose of desmopressin oral lyophilisate is 120 μg, around a fifth of children were prescribed 60 μg for long-term use. A greater proportion of girls (22.6%) than boys (19.8%) received this low dose. Treatment duration was longer for boys than girls on oral lyophilisate (mean 489–524 vs. 414–462 days) and tablet (0.1 mg: 204 vs. 161 days). Prescribed daily dose was consistent with time between prescriptions, indicating no significant drug holidays. There were no admissions for hyponatremia during the observation period.
Conclusion: Danish national prescription data on pediatric desmopressin dosage are consistent with a greater sensitivity to desmopressin in girls than boys. Further studies are required.
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What is Known:
• Desmopressin has been used for pediatric nocturnal enuresis for decades
• Recent evidence suggests a sex difference in desmopressin sensitivity in adults
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What is New:
• For the first time, desmopressin prescription practices in nocturnal enuresis are documented for an entire country
• A higher proportion of girls than boys received a low dose of desmopressin, consistent with the sex difference in sensitivity reported in adults.
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