The theory of one medicine per person is the basic fundamental truth. When Hahnemann initially propagated this concept, there was a real large meaning in this. It means one constitutional medicine. In other words, constitutional medicine should never be changed in the whole life of the patient. But when a new concept of homoeopathy was discovered, things were bound to be still to be known much.
The students in college, when they come out of college, end up in total uncertainty. What is a constitutional medicine and how to make out which are the constitutional medicines in the materia medica? Any medicine which is prepared out of a substance which has long life in nature is a constitutional medicine. But similarity does not end up just with the constitutional medicine.
In real practice, one can come across that for every patient, there are some more symptoms coming forth which require something additional.?After much of experience, we come to know that Euphrasia suits the eye troubles much better than the constitutional medicine fitting the whole case. Pulsatilla suits the digestive disorders much more than the constitutional medicine fitting the whole case and such constitutional medicines do not tackle the problems?while sticking to one medicine per person. We are compulsively required to prescribe such poly prescriptions. A patient needs his constitutional medicine and he will need Pulsatilla also.
But remember that we should keep the potency low and low always and ever. At high potencies, poly prescribing will jumble up results much worse. Low potency is the order of the day–order of the modern day. Give poly prescriptions respecting the similarity criteria in the most holy manner and in the strictest sense but give low potencies.