 [ Symptoms ] who is at risk for getting extensively drug resistant xdr tuberculosis [ Disease ] drug resistant tuberculosis [multidrug resistant mdr or extensively drug resistant xdr] is more common in people who do not take their tb medicine regularly do not take all of their tb medicines as told by their doctor or nurse develop active tb disease again after having taken tb medicine in the past come from areas of the world where drug resistant tb is common have spent time with someone known to have drug resistant tb disease