Isopathy is a corollary of causal medicine if the identical antigen is chosen after a successful search for the immediate cause of the disease under treatment.  The term Isopathy is derived from the Greek word 'Ios', which means 'equal'. It is often considered a subset of Homeopathy due to its use of potentisation and overlap of drug substances with homeopathy. It includes:
- Using Nosode of the same infection from which the patient is suffering.
- Prescribing one's own potentised discharges.
- Prescribing the potentised allergen or any other causative agent.
- ↑ Young WW, Isopathy and Homoeopathy Their Relationship, The Journal Of American Institute Of Homoeopathy, 1935 Dec Vol XXVIII No 12