Is it poisonous to drink too much water boiled with mugwort leaves?

Mugwort leaves itself has a small poison, boiled water is also poisonous to drink.
Mugwort leaves are bitter, pungent, warm in nature, belonging to the liver, spleen and kidney meridians, and have a small poison. The main effect is to dispel cold and relieve pain, warm menstruation and stop bleeding, and dispel dampness and relieve itching when used externally. It can treat irregular menstruation, dysmenorrhea, metrorrhagia (excessive menstrual flow or dribbling), hypogonadism, infertility with cold uterus, restlessness of the fetus, cold pain in the abdomen, vomiting of blood, and blood in the stool.
This product is fragrant and pungent, warming and dispersing cold, warming qi and blood and warming the meridians, it is an essential medicine for warming menstruation and stopping bleeding, and is suitable for bleeding with deficiency cold. As it mainly enters the liver and kidney meridians, it is especially suitable for bleeding caused by disintegration and menorrhagia due to deficiency and coldness of the lower element and lack of solidity of the flushing and renting channels (the flushing and renting veins are weak, which affects the function of solidity and regeneration).
The adverse effects of this product are not clear. Caution should be exercised if there is deficiency of yin and blood heat.
If the patient is not feeling well, it is recommended to consult the doctor in time to find out the cause of the disease and standardize the treatment. Self-medication is not recommended to avoid delaying the condition.