Option 1: Antibiotics are medications used to treat bacterial infections, but they do not relieve pain directly. They are not designed to target pain relief.

Option 2: Analgesics are medications specifically designed to relieve pain. They work by blocking pain signals in the body, reducing inflammation, and providing temporary relief from pain.

Option 3: Antipyretics are medications used to reduce fever, not specifically for pain relief. While they may indirectly help with pain by reducing inflammation, their primary purpose is to lower body temperature.

Option 4: Disinfectants are substances used to kill bacteria and other microorganisms on surfaces, but they do not provide direct pain relief.

Therefore, option 2, analgesics, is the correct answer as they are specifically designed to relieve pain.