Medications are dispensed by drug name, not classification. However Quentin's prescription bottle, that Laurel has taken, says that her medication is "Benzodiazepine," which is a class of psychoactive drugs that include, among others, Valium and Ativan.
Quentin refers to his missing pain medication, the ones that Laurel took. However, the bottle is labeled as Benzodiazepine. Benzodiazepines are not pain medication, they are used for sedation.
When Oliver enters Shrapnel's shop and is surrounded by lasers, one particular laser is fixed on the tip of his drawn arrow. It is implied that if he moves the arrow or trips any other laser, a bomb will detonate. A moment later when the character turns to look at a television screen there is a brief shot where he lowers his bow and arrow slightly allowing the beam to be unbroken.