Warm water soothes itchy and sore throat, arrests coughing.

Warm water soothes itchy and sore throat, arrests coughing.
Dr Abe V Rotor

Don’t take medicated drops or syrup for your itchy or sore throat. 

All you need is warm water which you sip now and then to relieve your throat and to stop your coughing.  

Have a thermos of hot water at hand.  Just add to tap water the same amount of hot water.  The warm water is  approximately 50 to 60 degrees Celsius. This temperature is within the Pasteurization temperature range that kills or immobilizes harmful bacteria - but not the beneficial ones.   

Drink warm water liberally to replace water loss and restore metabolite balance while helping the body eliminate waste and toxin.  
Acknowledgement: Wikipedia, ADAM Internet for images 

Common streptococcus bacteria