Cough and nasal congestion may be caused by allergic rhinitis or colds, allergic rhinitis can take loratadine tablets and other drugs, light colds are self-limiting, generally do not need treatment, heavy, cough and nasal congestion can take cotrimoxazole tablets and other drugs to treat. 1. Allergic rhinitis: If contact with some allergic substances leads to infection of the nasal mucosa, allergic rhinitis may be triggered, leading to coughing and nasal congestion, etc., which can be treated with anti-allergic drugs, such as loratadine and cetirizine. 2. Colds: When the symptoms of cough and nasal congestion are not serious, they are self-limiting and generally do not require treatment. When the cough and nasal congestion are severe, drugs such as cotrimoxazole can be taken to enhance the antipyretic and analgesic effects and relieve or improve the symptoms caused by colds. Cough nasal congestion is not excluded is caused by other aspects, such as the presence of sinusitis, inferior turbinate hypertrophy rhinitis nasal secretion, can appear nasal congestion, secretion reflux can stimulate the throat coughing, it is recommended to go to the hospital, clear cause of the medication as prescribed by the doctor.