Covonia mentholated cough mixture provides effective relief for the symptoms of a troublesome chesty cough and bronchitis it may be used for treatment for adults elderly and children over 5 years this syrup has a non drowsy effect and can be used for daytime cough treatment decongestant it belongs to a group of medicines known as expectorants which help to remove phlegm buildup caused by a chesty cough the menthol contained in it helps to cool the throat and relieves soreness and congestio