Was taming a lvl 44 trike, used 4 biotoxins as suggested and still wasnt enough, about half way through the tame i came back to check on him, and 3 low level dinos and he was fine. Took my low level tames back to base (was gone maybe 10mins) came back and the trike was awake, dont use biotoxins for tames until the correct amount is shown.
They are easy first get slow level if you are start game. Preferably a lvl1 to a lvl 10. Then knock it out with a slingshot or tranqs. I run in circles and knock it out. After that let starve for 3-5 minutes then feed green kibble ,crops , or mejos. After that give either narco berries or narcotics. Then you got a trike.