I wish I could take pain meds on a scheduled basis but they make me so sick that I have to always take Phenergen first which basically conks me out. So I'm happy that 800mg ibuprofen seems to be enough to carry me through the day. Nighttime is a totally different story!!
Ibuprofen is an anti-inflammatory but it is really not a very good pain reliever. You do ned somethign more effective, for regular pain relief.
Can you ask you doctor for some medication that will stop the vomiting? I have the same problem with narcotics adn my doctor prescribes Zofran or Maxalon, to be taken routinely, along with the pain relievers.
Also, don't take your pills on an empty stomach. Have some crackers beside you and eat a couple of those with the pills.
New Zealand