Anything you consume can carry the risk of interacting negatively with something else in your body — for example, something as simple and every-day as garlic can increase the risk of bleeding if consumed alongside blood-thinning drugs. That’s why it’s important that you give your practitioner as much information as possible — they need to know about all of your medications, supplements, allergies, dietary restrictions, etc. so they can tailor their herbal formula to you and avoid any unintended side effects.