请将以下内容总结为三句话，并且尽可能保留原文的重点信息：NOTE:_classification for the顺势疗法 (homeopathy) falls under special circumstances. Globally, the regulation of it is inconsistent, but countries like India, Mexico, Germany, and the UK recognize it and incorporate it into their national health care systems. Although it is widely regarded as pseudoscience and not effective beyond a placebo effect, Italy, Portugal, and Spain are notable for not regulating it at all.
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顺势疗法被归类为特殊情况，全球对其监管不一，但印度、墨西哥、德国和英国等国家承认并将其纳入国家医疗体系。尽管顺势疗法普遍被视为伪科学、几乎没有超出安慰剂效应的有效性，但意大利、葡萄牙和西班牙并未对其进行监管。
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