For a natural "aspirin" and General pain remedy it's hard to beat Yarrow. It grows in most states and climates and many foreign countries and is easy to identify and process. Made into a tea and steeped takes away the bitterness of raw leaves. The roots may be harvested and dried as well, pounded into a pulp they can relieve anything from a tooth ache to bowel problems. If interested take the time to research this plant and all its values and medicinal properties. Just make sure to properly identify it before injesting any parts. It mostly grows in meadows and surrounding areas or along cooler stream banks. Yarrow leaves look like baby carrot leaves and the flower when in bloom looks like a small flat cauliflower made up of hundreds of tiny petals.