Painkillers / Sedatives
Did anyone think it odd that one (or two) of the women was taking painkillers casually, and then when Alireza arrived they offered him a "sedative"? With alcohol being illegal, do Iranians pop pills instead?
http://www.economist.com/news/middle-east-and-africa/21583717-why-so-many-young-iranians-are-hooked-hard-drugs-other-religion