Period Pain relief, Menstrual Pain relief and Endometriosis Treatments, form Menastil, UKMenastil - A soothing oil that offers an all natural and drug free option for temporary relief of endometriosis discomfort, menstrual discomfort and period pain. provides menstrual pain relief and period pain relief.Menastil is the result of 4 years of testing and product development with its origins in nerve cell research. Taking note of historical uses for essential oils, it was shown that Calendula oil, Menastil's active ingredient, was effective as a topical analgesic for pain relief. After four years of research, testing and development, this revolutionary product for women is now available directly to consumers through this website and will soon be available in retail outlets nationwide.