Have actual narcotics on you because the berries give very little torpor. Soothing balm will allow you to tame it easier because it make it clam and will let your taming food do more. Make sure also have saddle ready so you can get wherever you need to go before you run into trouble. I tried taming one without narcotics and it torpor dropped to fast to tame it.

More Pteranodon Taming & KO Tips