By Stan Guthrie

Reports of American celebrities “entering rehab” no longer shock us. Just last year, according to Peggy Drexler of The Huffington Post, the following stars checked in for help with their addictions: Josh Brolin, Zac Efron, Lindsay Lohan, Elizabeth Vargas, Adam Shankman, and Amanda Bynes.

The death of acclaimed character actor Philip Seymour Hoffman earlier this month, however, is a different matter.