Doctorleela, thanks for your message alerting me to this.

To follow my thoughts you need to hand Chronic Diseases pp.115-6, Organon para's 74-76 (notably 76) and Boenninghausen's TT, rubrics on poisonings.

Starting with Organon para 76, Hahnemann states that homoeopathic remedies are only for the purpose of curing natural disease, and that drug-induced diseases must be cured by the vitality, with the aid of restful living and homoeopathic treatment "against any chronic miasm that might still be lying in the background". Even then, the cure of the drug-disease is not certain.

So, then I turned to Boenninghausen's rubrics on Mercury poisoning, and lo! there are non-miasmatic remedies listed. So I wondered what was going on, since Organon par76 states that homoeopathy cannot treat chronic poisonings, only support the vitality by attending to any miasms separate to the poisoning.

Part of the answer is that Boenninghausen's list includes remedies for acute poisonings.

The rest of the answer is in Chronic Diseases pp 115-16, where Hahnemann explains that the poisonings he was referring to in Organon para 76, which are not treatable by homoeopathy, are those where there is organic change, not merely dynamic.

So in addtion to being able to treat acute poisoning, homoeopathy can treat the intermediate state at which there is chronic dynamic but not yet organic alteration from poisoning.

Para 76 of The Organon explains why sadly we can often do so little for degenerative neurological conditions that have been caused by mercury poisoning.