I started on MagO7 (like Oxypowder ) taking two doses on Saturday. On Saturday I had 2 very watery BM's. On Sunday it was more like 6 BM's - also watery. Since I felt it was still working, I didn't take any more on Sunday. Monday morning I woke up and had 2 BM's within an hour. Still didn't take anymore (had to work that day and no way I could sit in the bathroom all day!). Well, I noticed over the weekend that I had developed a horrible headache (read: icepick to my head). It would develop in mid to late afternoon and last until bedtime. Sunday was worse. Monday still developed it. Today not as bad. Hardly there at all. It just occurred to me that the headache may be a detox symptom from the bowel cleanse. Is that possible? I really didn't alter my eating at all (in fact I had deep fried shrimp Friday and I've been trying to limit most fats - and especially anything deep fried). Just trying to figure out why the horrible headaches. I get them that severe a few times a year, but always only last one day and do not come back the next day.