Rivastigmine but not vardenafil reverses cannabis-induced impairment of verbal memory in healthy humans (2014)

This is referring to, and rightly so, cannabis-induced impairment whilst high, which is expected. After you're no longer high, typically unless heavy use (multiple times per day every day) for a prolonged period of time there's no cognitive impairment apart from perhaps attention deficits due to modulating DA response in the PFC as well as alpha wave activity.

With that said, your notion toward short-term memory signifies exactly that, a lack of proper salience induced to the stimuli. The reason I say this though, the cholinergic drug probably won't do much to ameliorate this current deficit, it was used to ameliorate it while still high. What would probably help you tremendously is consistent meditation & exercise. That's your best bet.