Charles There are actually 2 sources of the Samento type--Nutramedix has Samento -- Nutricology has Prima Una Da Gato and in my experience they are identical with the Nuticology being a bit less expensive. Sue, Has your MD ever done a CDSA to check for any other gut pathogens? By this time it would seem that your B12 levels would be really low after that much disbiosis. Further your neurological problems could be tightly tied in with B12 and or methyfolate as they are synergistic and need for proper mylineation to occur. For sure the herbals work and are powerful stuff--but they don't create the havoc that drugs do.Samento is immune building while antibiotics are immuno suppressive and cause an acid Ph in your chemistry.