I think 421's onto something. The more uneasy you make the other customers , the more they'll want you out ASAP.
Try rocking back and forth, talking to yourself, don't shave or shower, and keep snorting your snot really loud up into your nasal stratosphere. While creepily smiling and winking at anyone under 12. That should speed things up.
Dress like a tramp be filthy and smell bad and they'll want to serve you fast to get rid of you.
People who pay for prescriptions should get preferential treatment.
Be it for methadone or whatever
I wonder if pharmacists are going to be replaced with machines in the future. 8)