Dr Reckeweg Usnea Barbata Mother Tincture is an immune system tonic. It is advised for the treatment of congestive headaches and sunstroke. This medicine is recommended for treating problmes related to the urinary and respiratory systems. It has strong anti-microbial properties that are effective against the Gram-positive bacteria Micrococcus viradans, Enterococcus faecalis, and Staphylococcus aureus.