J collis brownes mixture can be used to relieve symptoms of diarrhoea stomach upsets and coughs antidiarrhoeal it contains a low dose of anhydrous morphine which helps the digestive tract to slow down contractions of the intestine and allow more water to be absorbed from undigested food peppermint oil is added to relax the spasms in the gut that cause stomach pains and upsets linked to diarrhea relieves coughs j collis brownes mixture is also used to relieve dry and unproductive coughs b