DEAR DR. ROACH:
My brother-in-law is a lovely man, but for years, he’s suffered from obesity. He also gambles and drinks alcohol too much. I hesitate to get too involved, but I recently read that the new weightloss drugs based on GLP-1 agonists are also helpful in reducing alcohol and gambling addictions. This sounds too good to be true. Is it? -- D.N.A.
ANSWER: The evidence is very strong that GLP-…