I've been doing some research on Periactin for the purpose of increasing my appetite. Upon doing some searches, I have found that both Periactin and Benadryl are anti-histamines and both upregulate beta receptors.
I'm not looking to upregulate beta receptors but I wonder if, because they appear to be similar drugs, they have similar side effects. Hence, you could use Benadryl in place of Periactin to stimulate the appetite.
It's a very, very basic theory I know, but are there any teeth to it?