Alright, I just played a game where my sanity took an early hit and I had to use a syringe very early on. After learning the full incantation and preparing to enter stonehenge I tried to use another syringe to prep myself for the ordeal, only to be told I was "still recovering". I used the syringe almost 26 hours previously. Just how the hell long am I supposed to wait to utilize this asset anyways? They cost money to buy. And you only get 60 hours to win. If the cooldown timer is much longer than 30, I have to ask why this is anything other than a one use only item in game?
Someone, please provide some clarification.