The strength of Salonpas® Original is evident in that it's still the #1 pain patch worldwide and in the US. Salonpas® has three active ingredients in a flexible, easy to apply patch that can be used up to four at a time. Salonpas® provides temporary relief of minor aches & pains of muscles & joints associated with arthritis, simple backache, strains, bruises, sprains. Fast, effective pain relief where it's needed most. Easy to Apply.