Sudafed mucus relief triple action cold ampamp flu tablets help relieve the symptoms of cold and flu including aches and pains headache blocked nose sore throat chills and chesty coughs the active ingredients in the tablets are guaifenesin which helps loosen the mucus in your chest and phenylephrine which eases swelling in the nasal passages the tablets also contain paracetamol to relieve pain and help bring down your temperature helping to get you back to your clear headed sel