I was moved to every 4 weeks when it seemed like Stelara at every 8 weeks was helping a little bit but not enough. HOWEVER, I did not get to stay on the 4wk dosing for long enough to find out if it worked because the approval for the increased dosing expired after 4 months and my doctor has had a bit of a hard time getting me re-approved.
After a long lapse in medication, I finally was able to get a second loading dose (infusion) this week, and now I am approved for 8 week injections, but appealing to get that 4 week dosing back.
I have a specialty pharmacy who delivers the injections right to my house, and because they got the orders so routinely I became a bit lazy in keeping track of my dosing, so it took me a little longer to realize that I was behind. The insurance companies really seem tough on approving this drug, so my advice especially when you're talking about an increased dose is just to stay on top of everything and be really vigilant in the process.