Where ever it says "how many narcotics needed" on this app is a lie. You almost always need way more than is recommended on here. So do not plan your tames around how many narcotics this app recommends for it.
So try and knock it out (this might take a while) feed it berries. But if you don’t bring any narcotics it will wake up. (This creature is in packs. So try to knock one and kill one but the downside is this creatures torpor will drain faster than any other. Be careful)!