My brother in law went into the hospital with nausea, high heart rate & low oxygen. They found he has many blood clots in both legs & both lungs. He has been taking the herbs Chanca Piedra & Horsetail grass for kidney stones, could one or both of those have contributed to this? They are keeping him in the hospital & gave him Heparin & Coumadine & seem to expect good results, but I wanted to know if we should get rid of those herbs.
Hai, Chance pie Chat Doctor.  It contains vitamin C and traceable minerals. No evidence of causing blood clot. Horsetail (Quietus)is diuretic type and got active principles like flavonoids etc.it will be helpful in renal disorders. Both (horsetail and chance pie