No, I don't.
Because suicide is more about delibarate action when one intentionally (not accidentally) kills that one. Drug addicted people don't kill themselves on purpose, but just a great amount of fix kills them. At the beginning of taking drugs they didn't start doing it with the aim of leaving the life soon. What surrounds their mind from the beginning taking drugs to their realizing that they die soon is the current drug reception and is more likely an enjoy from it.