Often people are quite surprised when I ask them about pain killing medication and actively encourage them to take it. I think that Osteopathy is still sometimes regarded as alternative medicine rather than complementary. From my point of view I want to get your body as mechanically well as possible. Pain in the short term is the body's protective system and useful, but it can also eventually cause its own problems. For example a chronically painful spine if unused becomes stiff and weak. Social life becomes limited and we often see a downward spiral of less and less activity, enjoyment and optimism. So anything that can help interrupt this should not be ignored.
Consider the idea of taking a regular dose of paracetamol (several doses are much more effective than a one off). That trip to the cinema or walk out becomes possible, still a bit painful but manageable. The trip out lifts the mood, and the pain decreases. The movement through the body sends positive messages to the brain and again the pain messages are 'turned down'. No you're not mended but you've taken control.
All drugs of course have risk involved so always follow instructions on contra-indications and dosage to the letter. Ask for advise. All drugs have stories to tell. Codeine can cause constipation and doesn't work at all for 10% of the population. You should never exceed the maximum dose stated on the paracetamol packet even if you are over 6foot and 'rugby player build'. Anti-inflammatories may actually slow down recovery from an injury if they're taken immediately...... You get the picture, every medicine has pros and cons which are not always well advertised so never just take something your Grandma had in her medicine cabinet (!), but keep an open mind.