Health & Healing
How long does naproxen take to work?
Estimated wait
~45 minutes
Based on published sources
Timeline guide
- Faster cases~40 minutes
- Average cases~45 minutes
- Slower casesUp to 1 hour
These are typical times for pain relief. Do not exceed the dose on the packet, take it with food to protect the stomach, and speak to a pharmacist or doctor if pain persists. General information, not medical advice.
For everyday pain, naproxen usually starts to work within about 30 to 60 minutes, with the strongest effect around 2 to 4 hours after the dose. One dose then lasts a long time — roughly 8 to 12 hours — which is why it is often taken only twice a day.
More details
Used for ongoing inflammation (such as arthritis) rather than one-off pain, it works differently: the full anti-inflammatory benefit builds up over days to a few weeks.
Last updated: 17 Jul 2026
Information is for general knowledge only.