Covonia chesty cough mixture mentholated relieves the symptoms of chesty coughs and sore throatscovonia chesty cough mixture mentholated contains liquorice and squill which belong to a group of medicines known as expectorants they help remove phlegm in people wih chesty coughs methol helps relieve congestion in chesty cought and bronchitiseffective relief of troublesome chesty coughsampnbsp