Yep, he's more than likely built up a tolerance plus he's adding alcohol consumption to the mix.
You know Hollie, your medication was legitimately prescribed by a competent Dr. for a real medical condition.
As I wrote before, Harry's self medicating and the so-called medical people he's listening to are catering to what he wants for treatment for his problems...meaning, he just wants to get high and zone out so he doesn't have to face his life, the real problems and the messes. Harry is a poor role model for the public and his kids, his niece and nephews.
Even if the Heritage Foundation is unsuccessful at getting his visa application made public, Harry's visa renewal is coming up. He may already be facing questions from Immigration, in private.