Ibuprofen, in high amounts for years, will cause ulcers and
kidney failure. Three years of that much
ibuprofen is enough to cause fatal kidney failure in some sensitive people.
I recommend learning about the treatment of opiate dependence in general; there are several options these days. But for all of them, success depends upon the motivation of the addict-- not the addict's family members, who are usually motivated long before the addict is.