Nurofen joint back 5 gel is a fast acting topical painkiller and anti inflammatory suitable for a range of symptoms including r r backache r r muscular and rheumatic pain r r strains and sprains r r sport injuries r r r r targeted pain relief r r using a pain relief gel instead of tablets allows you to target the pain or inflammation at its source since less ibuprofen will be absorbed in your system than if you took equivalent strength tablets the chance of side effects is reduced