Besides the can of cleaner, you will need to also buy the kit that allows you to hook the can up to your car. It is a bit pricy for most consumers, since the kit usually sells for something like $250.00.
If you suspect dirty injectors, it is definitly worth running a can of injector cleaner through the fuel tank first. Use only a high quality cleaner, such as RedLine or Techron (not the cheap Techron, but the $9.00 big bottle).
