Lark shook their head.
"I technically can't offer you advice on how to use it," they told their customer as they gestured at the carefully measured packet on the counter.
"I can tell you that it's often taken as four doses, a quarter of the packet at a time, once a day and no more," Lark continued, their voice a bit quieter.
Their customer blinked and then nodded, quickly offering coins for the little packet and then scurrying for the door.
"Lark!"
Lark froze at the sound of the shop owner's voice. Had they gone too far?
"Good job."