I began using St. Johns Wort for a couple days now. I also have really bad allergies this time of year, and subsequently use Diphenhydramine Hydrochloride at night, in order to wake up not feeling so stuffy, and to fall asleep a lot faster. I'm really worried there could be a bad reaction, as I've had from using Diphenhydramine Hydrochloride and Melatonin in the past (seemed to cause night terrors and sleep paralysis). If anyone has used both drugs at the same time, I would really like to know if you'd experienced any kind of reactions with them.