How long it takes to cure the symptoms of dry throat and cough depends on the different causes of the patient: 1.If the patient’s dry throat and cough are caused by cold, it will take about 7 days to cure, if the symptoms are not serious and the patient is in good health, he needs to drink more water and eat more fruits, it is possible to cure in 3-5 days. 2.If the patient’s dry throat and cough are caused by environmental factors, as long as the environmental factors are improved, the symptoms of dry throat and cough can be cured and will disappear in a day or so. If the cough is caused by environmental factors, as long as the environmental factors are improved, the symptoms of dry itch and cough can be cured, and the symptoms will disappear in a day or so. 3, if the dry throat itch and cough are caused by allergic factors, the cure time is uncertain, and it may take about 1-2 weeks, and patients should also stay away from allergens and take anti-allergy drugs such as loratadine.