I would almost certainly say yes, this will screw up his CCW. I don't know Texas law, but in Nevada you can't have one within the past 5 years. And if you get a DUI after you already have the permit you can kiss it goodbye for 5 years from that day.
Funny, that was one of the side effects of getting the CCW for me too. Actually a very good thing.backing off the drinks (beers) to no almost nothing (like one beer heh) when out while carrying or had the gun in the car, stopped with the quick snippy mouth to strangers, eased up on the driving...just practicing avoidance to confrontations and other things that come along with carrying a firearm. You know, practicing the law abiding and "model citizen" thingy....