The investigation is designed as a randomized, double-blind, placebo-controlled study, which means some participants will receive the actual medication while others will receive a placebo, with neither the participants nor the researchers knowing who receives which treatment during the study. Researchers will monitor changes in the number of wet nights per week, measure the amount of urine produced at night, assess bladder capacity, and track any side effects that may occur.

The purpose of the study is to understand the differences in how these two forms of desmopressin work in the body. This includes looking at how the body absorbs and processes the medication, as well as how effective each treatment is at concentrating urine. The study will involve children taking one of the two medications, and their responses will be monitored over a period of time. The children will take the medication either as an oral lyophilisate, which is a type of tablet that dissolves in the mouth, or as a sublingual tablet, which is placed under the tongue to dissolve.

Throughout the study, researchers will collect information on how the medications affect urine concentration and output. They will also gather feedback on the taste and texture of the medications to understand which one is preferred by the participants. The study aims to provide valuable insights into the best treatment options for children with bedwetting, helping to improve their quality of life.