You are in pain, you need relief so you nip down to your local pharmacy in search of a pain killer. The trouble is you are met with a bewildering choice of around 20 different types and brands. So which pain killer is the one you need right now. How to find exactly what you need with all this choice can be really frustrating. So here is a basic guide of the leading types of pain relief and what you need to be aware of when choosing one.