Use with caution in heart disease, hypertension, hyperthyroidism, diabetes, seizures, and in patients with low potassium risk. Seek medical help if breathing worsens, severe palpitations, chest pain, or allergic reaction occurs. Not intended for dry cough without mucus unless prescribed. Use caution in children and elderly; avoid self-medication for prolonged cough—consult a doctor if symptoms persist beyond a few days or are accompanied by fever, blood in sputum, or weight loss.