Does Ibn al-Qayyim agree with or refute the statement that consuming too much black seed is fatal, and what is the context of his words in "Al-Tibb al-Nabawi" (Prophetic Medicine)?

Ibn al-Qayyim's statement about black seed (Nigella sativa) does not indicate his endorsement of the view that excessive consumption of it is lethal. Rather, he weakens this claim by using the phrase "some people alleged." Ibn Muflih followed him by using the expression "it was said," which also signifies weakening the claim.