Which of the following nasal spray is very effective in control of enuresis –
**Core Concept**
Desmopressin is a synthetic analogue of vasopressin, which plays a crucial role in regulating water reabsorption in the kidneys. It is often used to treat nocturnal enuresis (bedwetting) by promoting water reabsorption in the kidneys during sleep.
**Why the Correct Answer is Right**
Desmopressin works by activating the V2 receptors in the collecting ducts of the kidneys, leading to an increase in water reabsorption and a decrease in urine production. This results in a decrease in the amount of urine produced during the night, making it an effective treatment for nocturnal enuresis. The V2 receptors are specific to the collecting ducts and are responsible for regulating water reabsorption.
**Why Each Wrong Option is Incorrect**
**Option A:** This is incorrect as it is not a medication commonly used for the treatment of nocturnal enuresis.
**Option B:** This is incorrect as it is an anticholinergic medication primarily used to treat overactive bladder and not nocturnal enuresis.
**Option C:** This is incorrect as it is an antihistamine medication primarily used to treat allergies and not nocturnal enuresis.
**Clinical Pearl / High-Yield Fact**
It is essential to note that desmopressin should be used with caution in patients with diabetes insipidus, as it can worsen the condition. Additionally, patients should be advised to monitor their urine output and adjust their dosage accordingly.
**Correct Answer: D. Desmopressin**