Sudafed Mucus Relief Triple Action Cold & Flu Tablets help to relieve the symptoms of colds and flu. They go to work on headaches, aches and pains, blocked nose, sore throat, chills and chesty coughs. With the active ingredients guaifenesin, which helps to loosen the mucus in your chest and phenylephrine, to help reduce swelling in the nasal passages these tablets will help you breathe easier, while paracetamol will relieve pain and help reduce your temperature. Please note that results may vary.