Can I take Amoxicillin, Acetaminophen, and Benadryl at the same time and get high? I dont wanna. I m allergic to Dust and grass and a lot of things outside, so if I dont take Benadryl I will break-out again. I have strep throat so I have to take the other 2 medicines, And can it give me liver, stomach, bowl, or heart damage?