Nurofen Maximum Strength Migraine Pain 684mg Caplets Nurofen Maximum Strength Migraine Pain 684mg Caplets provide fast, effective relief from headaches & migraine pain in just one caplet. They contain a form of ibuprofen which breaks down easily in the body, making it easier for the body to absorb it into the bloodstream so it can get to the source of pain quickly. Ibuprofen belongs to a group of medicines called non-steroidal anti-inflammatory drugs (NSAIDs) & works by changing the body's response to pain, swelling & high temperature.