Existing and incompatible

Exciting incompatible reactions.
One of the most common situations which may Come across the incompatibility of a drug is when we try to antidote the over reaction of a given remedy with it. Either in a proving or in treatment, if we we need to antidote a drug, we may find out very similar remedy and administer it. But sometimes, instead of easing the situation, it seems to increase the troubles and add new symptoms to the original ones.
For example Acetic acid and vinegar have been used successfully to antidote strong drugs like Aconite, Anaesthetics, Opium, Stramonium, and Tobacco. But if used against some other like Belladonna and Arnica, they increase the sufferings.
Hahnemann says, Cinchona bark, given for the debility produced  by Ledum is very injurious.(Ledum is an antidote to Cinchona).
I saw a very bad case of cholera a typical Veratrum alb case. It was promptly cured by one dose of Veratrum 200, next day just to remove the residual debility, I gave China 30 within half an hour the patient started purging again, China must have been an incompatible remedy to Veratrum. Luckily I gave Veratrum 200 one dose given again stopped the trouble. After a day Acid phos 6th acted as a good pickup to the patient.
When a prescription is made without the knowledge of the previous treatment, this happens when a patient goes from one HOMOEOPATH to another HOMOEOPATH, the new DR. Gets a bad name when his first prescription upset the patient terribly. Dr. Kent says it is often a hardship for a patient to fall into the hands of a second DR. It is very common thing for patients to come to me from the hand of good prescribes. I tell them to stay with their DR. Such changing is often deterrimental to the patient., unless he brings a full record, and this is specifically true in relation to a case that has been partially relieved, where the remedy has acted properly.
During Homoeopathic treatment, certain foods do not go well with the remedy, Mrs J. T. Kent, the untiring coworker of Dr. Kent has beautifully elaborated this what the patient shall eat and drink must be selected with due regard to the remedy he is taking and his own constitutional demands. When patient is under the influence of either Carbo Veg or Pulsaitilla you will not be surprised if the stomach becomes wonderfully disorderd after eating fat or greasy rich food, when your patient has been many days under Bryonia, Lyco, or petroleum, and he comes in and complains of an unusually disorderd stomach, you may often hit the nail on the head by saying, you must have eaten cabbage.. Coffee must never be used when your patients is taking China or Nux vom. It would be equally true if you are treating a nervous paralytic with Causticum, you would find your patients greatly disturbed by coffee and you would get no curative action from Causticum. It is often very important to warn patients including in cold and frozen foods after giving Ars, Lyco, Nux, Rhus tox or Pulsaitilla, it is well to warn to patients under the influence of Thuja to avoid oyster. Patient suddenly become disturbed from drinking milk if under the influence of Calc carb, Nit acid, or Sepia and be warn sure to patients under the influence of Ant crud, to avoid sour things, vinegar and sour wine. Be sure to tell mothers whose children are under the influence of Ignatia, or Agr nifty, to keep candy away from them or you will disorderd stomach and diarrhoea to contend with, which may interfere with the management of the deeper seated troubles. How wonderfully she has selected the correct phrase, when under the influence of, because after the cure, the patient can eat those very things with immunity. Only when under influence (action) of the remedy are the patients hypersensitive to those incompatible foods. Kent's Materia Medica is also full of such precious advice.