As-- the symtoms indicate -- the remedy will be selected.
My own experience has shown that in longstanding cases of Psoric origin the symptoms every so often call forward Sulph and to a lesser degree Hep-sul.
During its action, usually new and persistent symptoms show, while the improvementsigns are clearly noticable. Once these improvementsigns start fading, it then is the time to take action and to find the remedy now suitable for the existing symptom - complex to carry forward the recovery.
So-- above lines from the CD should not be misstaken as being down to what the pratitioner feels as in: Now we need a intercurrent -- lets see which of the two fits better and give it.

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Hans Weitbrecht
Consultant Homeopath