and typically a short acting barbiturate
. Was fairly more common in the 50s and 60s. Not as much anymore, often times will stay focused on one task (Methamphetamine), and is extemely hard to distrub that task (Methampetamine + Barbiturate).
Back in the day, my grandfather used to work in orchards picking fruit and didn't care about anything... I think it was the black beauties.