Yes, you certaintly can mix essences. In fact I think you can take up to 5 at the same time. I have a book (Advanced bach Flower therapy by Bome) on Bach's Essences and the psychological factors associated with each. The book will recommend several different ones than can be combined. Everyone is so unique and complex, it helps to use a few types of emotional vibration support. This subtle vibrational (energetic)therapy really helps make permanent changes. The emotions run deep within us, its hard to undo them by talking. Reiki, Flower essences, gem essences, Emotional Freedom Technique, gem essences, and other things have all been developed to help this process. Emotional balancing is critical to healing and addictions.