Complex sentence: Belladonna has been used in herbal medicine for centuries as a pain reliever, muscle relaxer, and anti-inflammatory, and to treat menstrual problems, peptic ulcer disease, histaminic reaction, and motion sickness.
Split into simpler sentences: Belladonna has been used in traditional treatments for centuries as a pain reliever, muscle relaxer, and anti-inflammatory. It is used to treat menstrual problems, peptic ulcer disease, histaminic reaction, and motion sickness.