There is no straight answer to this question. Generally speaking, naturopaths can write prescriptions except in certain conditions. Rules change from province to province and some provinces allow licensed naturopathic doctors to prescribe medicines. However, they very rarely do so. They may, however, refer a patient to a conventional doctor who may prescribe medication.
Most naturopathic care experts go with natural therapies with little to no side effects before they choose to use the prescription pad.