Beside being a powerful anti-inflammatory prednisone is also an immune suppressant and is used to control your immune system. However, such a short course of treatment sounds more like one for pain. Lupus is a chronic disease and requires a long term approach particularly if your flares are getting worse. I have yet to see a short course of treatment with corticosteroids that produces lasting suppression and disease control.
Pred is not a drug you really want to be on long term but it usually works and works fast. I was on it for 6 years and also took a prednisone sparing drug so I could taper off it. Didn't quite work out according to plan but that is a typical treatment scenario for lupus and many other AI diseases. Pred and another, slower acting but more tolerable drug is normal.
I use a low dose of pred for joint pain now but only take as needed. Can't take NSAIDs now which is the reason I take it occasionally when my arthritic/lupus joint pain is high. When my lupus flared last spring and attacked my platelets and liver severely I took high doses but only for about 3 months. It helped but I am now talking to my doctors about a longer term treatment that is not a steroid.
MCTD (SLE Lupus, polymyositis, scleroderma). Diagnosed 2005. Kidney, liver, GI tract, dysphagia, raynauds, barretts esophagus, quadriplegic in 2005. Recovered and now active in downhill skiing, golf, hiking. Meds: amlodipine, benezapril, omeprazole, potassium, folic acid, vitamins, maxide.
Remain Optimistic and you can overcome.