 [ Symptoms ] can a cancer patient quit methadone after 3 days without harmful side effects  my uncle has stage 4 lung cancer and has been on many pain meds the dr switched him to methadone and this is obvoiously the wrong drug for him he is unable to feed himself and not with it can we safely take him off of it after only 2 12 days of taking it without him having harmful side effects  [ Disease ] i am surprised at the fact that you have all these diagnosis and test results but have not been treated for the symptoms it may just be a urinary tract infection i would revisit the dr who gave you this imformation and results from your test and tell him or her that the problem still persist