Your excretory system includes your kidneys. And your kidneys is what makes urine. Intoxication weakens your kidneys making them fail at regulating bodily fluid. And you will go pee a lot more.
Answer: compulsion
Explanation: Cambridge dictionary describes complusion as a very strong feeling of wanting to do something repeatedly that is difficult to control. Due to the fact that he repeatedly checks his messages every 15 minutes it shows that he is exhibiting compulsive behaviours.