The phrase "the best medicine" is an idiomatic expression that means taking appropriate measures or actions to address a problem, situation or condition. It can refer to any action taken to improve one's health and well-being, whether it be through medical treatment, lifestyle changes, therapy, exercise, diet, rest or other self-care practices. The phrase suggests that the chosen course of action is likely to have a positive effect on the person's condition, and may even prevent further complications from arising. In essence, "the best medicine" refers to any proactive steps taken towards maintaining good health and wellness.