[thegirl1951]

PM is known to cause blood pressure issues in some people.  Headache could be a symptom of a BP issue for you. I have been experimenting with PM in very low doses, watching for BP issues for myself.  I get lightheaded and have a slight headache with almost all high estrogen-like herbs except for FG and Fennel.  Also, there are some people who are sensitive to PM and other herbs that may cause blood thinner issues.  My suggestion is you always check with medical drug websites for side effects of herbs (drug.com, webmd.com, etc).