Tyenol dosage

Stef

I just have a question- I’m curious every time I go to the doctor and my daughter gets vaccinations I always ask for the proper dosage if she gets a fever. My daughter is weighing 20 pounds and he said to give a teaspoon which is 5 mL when I look online at all the other various charts it says 3.75 or 3/4 teaspoon now I know online is probably not accurate and for me to listen to my doctor. Is anyone else is Dr. telling about the same dosage?