Covonia Cold & Flu Formula Sugar Free provides relief of cold and flu symptoms, including aches and pains, headache, blocked nose and sinuses, dry tickly sore throat and chesty coughs. For adults and children over 12 years old. Covonia Cold & Flu Formula is an oral solution containing paracetamol which is an analgesic for pain relief. It also contains phenylephrine hydrochloride, a decongestant to help you breathe more easily. Guaifenesin is an expectorant which loosens phlegm and cetylpyridinium chloride is an antiseptic to ease tickly sore throats. The medicine pr s short term relief of cold and flu symptoms, including aches and pains, headache, blocked nose and tickly sore throat and chesty coughs.