In a formula, the dosage of an ingredient is closely related with its effect and toxicity. Any change in the total weight of a formula, weight of the main herbs or the ratios between herbs can change not only the power of the recipe but also its actions and indications. That is why proper dosages can make the toxic herb a remedial one, whereas wrong dosages can make a remedial herb toxic. To use the minimum dose and get the maximum effect, more studies should be made as to the Chinese herbs, especially the dose-response relationship among dosage, effect and toxicity. The spectra of poisoning a...
