Thanks to booming sales of blockbuster obesity and diabetes treatments, the amount that Americans spent on prescription drugs this year is on track to surpass $1 trillion, according to a report released in April by the American Society of Health-System Pharmacists (ASHP). That would be a sharp, above-inflation 9.3% increase from the $915 billion in U.S. drug sales recorded last year, one of the fastest one-year percentage jumps ever recorded by …