Final answer:
Paracetamol and codeine are combined to provide effective pain relief for conditions such as headache and musculoskeletal pain.
Step-by-step explanation:
Paracetamol, also known as acetaminophen, is a medication used to treat pain and reduce fever. Codeine is an opioid analgesic that is often combined with paracetamol in medications for the relief of mild to moderate pain. When taken together, paracetamol and codeine work synergistically to provide more effective pain relief. For example, the combination of paracetamol and codeine is commonly used to treat conditions such as headache, dental pain, and musculoskeletal pain. It is important to follow the recommended dosage and duration of treatment as directed by a healthcare professional, as codeine can be habit-forming and may cause side effects.