Core Viewpoint - Rational drug use is essential for safety, effectiveness, and cost-effectiveness, and improper use can endanger health and life [1][2] Group 1: Principles of Rational Drug Use - Rational drug use should follow principles of safety, effectiveness, economy, and appropriateness, including avoiding unnecessary medications and preferring oral administration over injections [1] - It is crucial to consult a doctor or pharmacist if any discomfort occurs during medication use [1] - Medications should be purchased from reputable pharmacies and hospitals, with careful reading of instructions and checking expiration dates [1] Group 2: Special Considerations - Special populations such as the elderly, children, pregnant and breastfeeding women, and patients with liver or kidney dysfunction should adhere strictly to medical advice and not use standard dosages [1] - Attention should be given to antibiotics, which can have adverse effects and toxicity; proper guidance from a doctor is necessary to prevent misuse [1] Group 3: Dietary Restrictions During Medication - During medication, dietary restrictions are important; for example, patients on warfarin should avoid large amounts of broccoli and spinach [2] - Alcohol consumption is prohibited for patients taking cephalosporins due to the risk of disulfiram-like reactions, which can be life-threatening [2] - Caffeine should be avoided for those on sedative medications, as it may reduce the effectiveness of these drugs and worsen sleep quality [2]