Acute hepatic porphyria (AHP) is a rare condition with symptoms that are similar with other more common conditions (e.g., irritable bowel syndrome, fibromyalgia, endometriosis). This causes some patients to go many years before the correct diagnosis is made. Irritable bowel syndrome (IBS) is a chronic and recurrent disorder of the GI tract usually accompanied by diarrhea, constipation or both. Fibromyalgia (FM) is a condition marked by muscle pain all over the body, sleep problems, and fatigue. Endometriosis is a painful condition in women where tissue like the lining of the uterus or womb grows on the outside of the organ.