Organon of Medicine

§ 23:

All pure experience, however, and all accurate research convince us that persistent symptoms of disease are far from being removed and annihilated by opposite symptoms of medicines (as in the antipathic, enantiopathic or palliative method), that, on the contrary, after transient, apparent alleviation, they break forth again, only with increased intensity, and become manifestly aggravated (see § 58 – 62 and 69).

Prasad Rasal:
In this aphorism, Dr Samuel Hahnemann explains regarding the palliative effect of the Antipathic medicines. He has given lot of proofs from different sources to explain this thought in Organon & that's why he says, all pure experiences...
Th...e last part of the aphorism is regarding the action of the Antipathic medicines. After the palliative action of the antipathic medicine is over, aggravation definitely follows. He has explained this in detail while explaining the Secondary Counter action in aphorism 58-69. In day today practice, we use to get its proof number of times. Patients on purgatives used to suffer a lot from severe constipation once they stop taking the purgatives etc.