... for rheumatoid arthritis, weak bones (osteoporosis), Raynaud’s syndrome, multiple sclerosis (MS), Sjogren’s syndrome, cancer, high cholesterol, ... , and peptic ulcer disease.Women use evening primrose oil in pregnancy for preventing high blood pressure (pre-eclampsia ... , and preventing late deliveries. Women also use evening primrose oil for premenstrual syndrome (PMS), breast pain, endometriosis, and ...