Thanks for the query.
Unfortunately there is no one medication which will bring the creatinine
down for chronic glomerulonephritis
which has been on going for 5 years.
However following measures may help in preventing rapid progression of the disease:
1) Protein restriction in diet:need to see a dietician
2) Strict blood pressure and blood sugar control (if the pt is diabetic)
3) Control of blood cholestrol
4) Quit smoking/ use of tobacco.
Hope this helps