Over the counter pain management products.
A lot of people have a misconception that these pain relief medications are not permitted in Workplace first aid kits. This isn't true, however they should only be self administered or administered by someone who is medically trained to do so. WorkSafe also recommends only providing pain relief medicine that is kept in the original packaging and in sizes that are available over the counter like the products available here.
See WorkSafe's First Aid at Work Guidance Document for more information.