What do you picture when you think about drug addiction in Fort Worth or Dallas? Years ago, people envisioned filthy ‘junkies’ with sunken eyes and pale, clammy skin. Then, in the last decade, young hipsters popularized “heroin chic”—the look of the emaciated, gaunt model with the blank stare. These days, there’s no stereotype, because even housewives and others that you might have never expected ...