Many people take this drug thinking it is safe...and it is for OCCASIONAL
use. It alters dopamine binding in the brain which has a direct effect on
muscles. I have a friend who used Benadryl almost nightly for 6 months and wound
up looking like she has cerebral palsy and Parkinsons. It took her almost 3
years to recover.
The info is in the medical papers if you want to Google them