Final answer:
Imipramine is the tricyclic antidepressant used to treat childhood enuresis. It is a tertiary amine antidepressant that can have mood-elevating effects in depressed patients over time.
Step-by-step explanation:
The tricyclic antidepressant used to treat childhood enuresis is Imipramine. This medication has been found to elevate mood in depressed patients after being administered over some time but can cause feelings of sleepiness and lightheadedness in normal subjects. Imipramine falls under the category of tertiary amines, which are one of the tricyclic antidepressants characterized by their three-ring chemical structure.