A person was complaining of excessive dilute urination. The doctor diagnosed it
to be due to reduced production of ADH. How would an increased level of ADH
in the blood correct the condition of the patient?

Dear student,
 The ADH acts on the distal tubule and collecting duct of nephron and causes increase in water reabsorption. This in turn decreases the amount of water excreted as urine. 
Thus the urine would not be diluted with increased production of ADH.
Hope this information clears your doubt about the topic.

Regards