Oral medicines are easy to take and usually cost less than other kinds of medicine.
Most oral medicines are in tablet form, but sometimes they are liquids that you drink. If it is hard for you to swallow and you cannot take a tablet or liquid for some other reasons, there are other ways to get these medicines. In addition there are many kinds of injections to give pain relief. Most injections use a tube or needle to place medicine directly into the body. Most of these injections give pain relief that lasts for many hours.