Oxycodone 40mg (x 100 tabs)
This depends on the type of oxycodone you take – fast acting or slow acting. Fast-acting oxycodone (capsules and liquid) take 30 to 60 minutes to work, but these wear off after 4 to 6 hours. Slow-acting oxycodone (tablets) can take 1 to 2 days to work fully, but the pain relief will last longer. An oxycodone injection into a vein gives the quickest pain relief and works almost straight away. Depending on why you’re taking oxycodone, you may only need to take it for a short time. For example, if you’re in pain after an injury or operation, you may only need to take oxycodone for a few days or weeks at most. You may need to take it for longer if you have a long-term condition such as cancer.