How often can you take 200mg ibuprofen?

The highest dose without prescription is 400 mg at the same time, for a maximum of 3 doses per day (every 6-8 hours). However, with a prescription, the dosage might be increased to 600 mg.

There is no benefit in going over 600 mg, and it will increase side effects. The prescriber should choose stronger NSAID (celebrex, naproxen, voltaren, etc..)

I have taken prescription ibuprofen (800mg) for chronic pain. It gave me a pretty bad ulcer. A dose that size should only be used under the guidance of your doctor.