question: COULD ST. JOHN S WORT CAUSE HIGH BLOOD PRESSURE AND BLOOD THINNING? I TAKE THE RECOMMENDED 300MG 2 TO 3 TIMES PER DAY. I BELIEVE I HAVE MINOR DEPRESSION AND FIND IT DIFFICULT NOT TO BE ON IT. NOW I AM WONDERING IF IT WOULD BE BETTER TO SWITCH TO A LOW DOSE OF PROZAC? WOULD THE SIDE EFFECTS AND INTERACTIONS OF PROZAC BE BETTER SUITED FOR ME? I have recently been diagnosed with high blood pressure and now take a water pill. I am 35 yrs old, and I am overweight. My doctor had thought that my ADD (dexedrine) medication or smoking might be causing this. I went off of the medication for several weeks, but there was no change in my blood pressure. I stopped smoking for 3 months, and still no change. I have lost a little weight, but I still have much further to go. Is it possible that the St. John s Wort herbal supplement I take faithfully 2-3x s everyday could actually be the culprit? Also, could it be thinning my blood ? Strange question I know but I also have acne and occasionally I unconsciously scratch my face. If this causes my blemish to bleed, it doesn t stop for up to an hour. I actually now have a septic stick that men use for nicks when shaving in order to get it to stop. It has been quite embarrasing as this happens a couple of times a week while I am at work and I have to hold a tissue to my face for an hour or longer. Last night I didn t realize that my face was bleeding as I do not recall scratching myself. I had a trail of dried blood down the side of my face.