dear user about your question iwould like to tell you that soreness of throat with dryness has more than one common cause it may be due to viral infection or bacterial infection of the throat and then we need to do investigative test for confirming that...we do throat swab test for detection of if there is infection or not and detection of the microorganism causing this...if it is viral no need to use antibiotics but you can take tylenol for relief of symptoms ..if throat swab detect that it is bacterial infection so simply you will be described antibiotics and after taking antibiotics improvement will occur......some times these symptoms are due to allergy and the causal factor of this allergy you only can know it ..it may be food or drinks or medical drugs....the other common cause of that is gastroeosophageal reflux as the gastric acid while you are sleeping reach your throat and cause dryness and soreness ...please follow simple steps mentioned to reach the cause and improvement will occur wish you healthy life