Dear Ricky,

Here Is a simplified Thought, as presented by Jayasuria.

(1) 2 remedies which have similar or parallel actions (often) antidote each other.

(2) Inimical remedies antidote each other. (they should not be used for therapeutic antidoting).

(3) 2 (or more) remedies, which are complimentary, may antidote each other, if used serially at short intervals. (A complimentary remedy cannot be inimical ;except Nitric acid, which is both complimentary and inimical to Lachesis.)

(4) Different potencies of the same remedy may antidote each other, particularly if the potencies differ widely on the scale of dilution.

(5) A potentized remedy may be antidoted by the natural substance taken orally as food or drink at the same time.

(6) Homeopathic nosodes may be antidoted by the isopathic immunization of the patient with a similar vaccine.

(7) THE ESSENCE OF THE HOMEOPATHIC CURE IS A MECHANISM OF ANTIDOTING THE DIS-EASE WITH THE SIMILLIUM.

The carc/nat-m relationship is that of follow-well/collateral relationship. It is not 'antidoting' in the proper sense; but rather more of diverting selected symptoms.Yet carc has this with other remedies = alum,arg-n,ars,ars-i,calc-p,dios,[lach,lyc (also antidote to carc)],med,nat-m,nat-s,nux-v (also antidotal to carc),op,phos,psor,puls,sep (also antidotal to carc,especially when there is indifference,sadness),staph,sulph,sul-ac,syph,tub(s).

I did not mean to interrupt ; seeing you were asking GM specifically; Yet hope this helps.