The major difference between a wet and dry cough is that a dry cough is one that does not produce mucus where as a wet cough means there is association of mucus and chest congestion. Sandu Whoopin; Ayurvedic Syrup for wet & Dry cough syrup being a natural herbal remedy does not cause drowsiness. Keeping this in mind, we strongly advice against self medication in case of cough that lasts longer than necessary & to know what dosage works best for you kindly consult with your physician.