I will not get prolotherapy because of the injected dextrose. Sure, the lidocaine will anesthetize the joint and make the pain go away temporarily, but the dextrose can spike your blood sugar, and it's not a sugar we normally absorb in the GI system. It's made from corn too, so there's a significant amount of sulfite, for those who are intolerant to that! I've read that it causes internal scarring, and I'm pretty sure my insurance won't cover it either.
I've had one regular knee steroid injection that did nothing, but didn't hurt. I had an ankly one that hurt like blazes when the lidocaine wore off and I hopped around for 5 days. The ones I get in my spine usually help after a few days, but they mostly don't last past about
6 weeks. One in my shoulder didn't work, but two subsequent ones by different doctors gave great relief.
The value of steroid injections depends on the skill of the doctor, the condition being treated, your sensitivities, and lots more. Unfortunately the shots seem only temporary, although they may give good diagnostic information.