An analgesic is a drug used to relieve pain. The analgesics used to relieve mild-to-moderate pain are: paracetamol; nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen and naproxen; aspirin (a salicylate NSAID); and weak opioids, such as codeine, dihydrocodeine, and tramadol. Fixed-dose combination preparations are also available, including: paracetamol with codeine, paracetamol with dihydrocodeine, paracetamol with tramadol, and aspirin with codeine.