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As your sister is having CRF it is very necessary that you first consult a NEPHROLOGIST
.Homoeopathy works better in certain conditions & in CRF it may play a supportive role but not a treatment.Practically CRF requires dialysis
in most cases;&in some where creatinine
is is control it can be treated with medicines.Please don't depend on Homoeopathy to do miracle cure & use it as a supportive therapy.