For an 8-month-old, over-the-counter cough medicines are not safe and should be avoided. You can safely comfort her with these simple home remedies: 1. Use a cool-mist humidifier in her room to moisten the air, which helps soothe her airways while sleeping. 2. Ensure she stays well-hydrated with frequent feedings of breast milk or formula. 3. If she has nasal congestion, use saline nose drops and a suction bulb to gently clear her nose before sleep. Note: Never give honey to babies under one year of age. If she has trouble breathing, a high fever, or if the cough persists for more than 10 days, please consult her paediatrician.