A naturopathic doctor may use and order for preventative and therapeutic purposes the following natural medicines and therapies: food, food extracts, vitamins, minerals, enzymes, digestive aids, whole gland thyroid and other natural hormones, plant substances, all homeopathic preparations, immunizations, counseling, hypnotherapy, biofeedback, dietary therapy, naturopathic manipulative therapy, naturopathic physical medicine, therapeutic devices, barrier devices for contraception and office procedures. Naturopathic doctors may also prescribe medications, including natural antibiotics and topical medicines, within the limitations set forth in subsection 4.