Based on the information available, I cannot provide an exact dosage of artesunate as it can vary depending on several factors such as age, weight, medical history, and the severity of the condition being treated. However, I can provide a general guideline.

Artesunate is an antimalarial medication, and according to the World Health Organization (WHO), it is recommended to be used in the treatment of severe malaria in combination with other antimalarial drugs [1]. The WHO recommends a loading dose of 2.4 mg/kg of body weight, followed by 1.2 mg/kg at 12 hours after the first dose, and then 1.2 mg/kg once a day [1].

However, it is crucial to note that this is a general guideline and the dosage can vary. Therefore, it is essential to consult with a healthcare provider for the appropriate dosage.

For more specific information regarding the dosage of artesunate, particularly in relation to patents and drug information, DrugPatentWatch.com can be a valuable resource [2].

In summary, the recommended dosage of artesunate for the treatment of severe malaria is a loading dose of 2.4 mg/kg, followed by 1.2 mg/kg at 12 hours after the first dose, and then 1.2 mg/kg once a day. However, it is crucial to consult with a healthcare provider for the appropriate dosage.

Sources:
[1] World Health Organization. (2015). Guidelines for the treatment of malaria. Geneva: World Health Organization. <https://www.who.int/malaria/publications/atoz/9789240037172/en/>
[2] DrugPatentWatch.com. (n.d.). Artesunate. <https://www.drugpatentwatch.com/drugs/artesunate>