How fast does Advil (ibuprofen) start working?
Advil typically starts to work within about 30 minutes, and many people feel noticeable relief around this timeframe. [1]
How long until it reaches full effect?
For many pain types, ibuprofen’s effects build over the next 1 to 2 hours after the dose, which is when many people notice the strongest relief. [1]
How long does the relief last after one dose?
The pain- or fever-reducing effect from an ibuprofen dose usually lasts about 4 to 6 hours, depending on the person and the condition being treated. [1]
What if it doesn’t seem to be working?
If you do not feel relief within a couple of hours, it may be because the dose is too low for the cause of the pain, the pain is not the type that responds well to ibuprofen, or the condition needs different treatment. You should not exceed the label dose. If symptoms are severe, worsening, or persistent, seek medical advice.
When should you get urgent help instead of waiting?
Get urgent care (or emergency help) if you have signs of a serious reaction or complication such as trouble breathing, swelling of the face or throat, black or bloody stools, vomiting blood, chest pain, or severe weakness.
Sources:
[1] https://www.drugs.com/advil.html