What is the recommended dosage of ivermectin for humans versus horses and how often?

Checked on September 23, 2025
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1. Summary of the results

The recommended dosage of ivermectin for humans versus horses is not clearly stated in most of the analyses provided [1] [2] [3] [4] [5] [6]. However, some sources suggest that the optimal dose of ivermectin for humans is 150-200 μg/kg [7] [8], while the dosage for horses is not specified. It is essential to note that ivermectin products approved for human use are available in oral and topical formulations [2], and using veterinary ivermectin products for human consumption can be highly concentrated and toxic [2] [9]. The frequency of dosage is not mentioned in the analyses, but it is crucial to follow proper medical guidance and not self-medicate with veterinary ivermectin products [9].

2. Missing context/alternative viewpoints

A critical missing context in the original statement is the specific condition being treated, as the dosage of ivermectin may vary depending on the condition and the weight of the animal [7] [4]. Additionally, the analyses highlight the importance of considering drug-drug interactions and polymorphisms in the mdr-1 gene when using ivermectin [6]. Alternative viewpoints include the potential risks of using ivermectin beyond its indication for onchocerciasis, such as serious neurological adverse events [6], and the dangers of ingesting veterinary-use ivermectin in attempts to prevent or treat COVID-19 [3]. It is also essential to consider the weight of the animal when determining the dosage of ivermectin for horses [7].

3. Potential misinformation/bias in the original statement

The original statement may be misleading, as it implies that there is a straightforward recommended dosage of ivermectin for humans versus horses [1] [2] [3]. However, the analyses suggest that the dosage of ivermectin depends on various factors, including the specific condition being treated, the weight of the animal, and the formulation of the product [7] [8] [4]. The statement may also be biased towards promoting the use of ivermectin for humans, without adequately considering the potential risks and limitations of its use [5] [9] [6]. Pharmaceutical companies and healthcare providers may benefit from a more nuanced understanding of ivermectin's uses and limitations, while patients and consumers may benefit from clear and accurate information about the risks and benefits of ivermectin use [2] [9].

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