What is the authenticity of attributing the statement to Ibn al-Qayyim that the Prophet's denial of contagion was based on experience and ijtihad, and is Prophetic Medicine based on experience and ijtihad?

Prophetic Medicine refers to the Prophetic Hadiths that mention health, disease prevention, and treatment, which the Hadith scholars included in their compilations. The claim that Prophetic Medicine originated from experience rather than revelation is incorrect for the following reasons: 1. The origin of what issues from the Prophet (peace be upon him) in terms of statements is revelation, based on Allah’s saying: ﴿Nor does he speak of (his own) desire. It is only a Revelation revealed.﴾ (An-Najm/3, 4), and his (peace be upon him) saying: «Write, for by Him in whose hand is my soul, nothing comes out of it but truth.» 2. The Prophet (peace be upon him) may exert ijtihad (independent reasoning), but he is not left to persist in error. His statements are either revelation, or ijtihad that was affirmed, or an error that was pointed out to him for correction, such as the story of the pollination of date palms, where the Prophet (peace be upon him) was not certain but spoke of his assumption, and he did not forbid them. 3. Among the Hadiths concerning medicine are those that cannot be mere ijtihad, due to their attribution of the matter to Allah or their reporting of the unseen. Examples include honey being a cure (Allah spoke the truth), angels commanding cupping, truffles being from manna and their water being a cure for the eye, and Ajwa dates being from Paradise and containing a cure for poison. These matters are only known through revelation. 4. The Prophet (peace be upon him) was not a physician, and he condemned those who practiced medicine without being a physician, holding them liable. So how could he definitively state types of medicines and say that such and such is a cure for such and such, except by revelation from Allah? The Hadith of the black seed, "a cure for every disease except death," cannot be a human experience. 5. The Sharia came with benefits for people in this world and the hereafter, so it is not surprising that it includes beneficial medicines by revelation from Allah. This is confirmed by Ibn Al-Qayyim's words in "Zad al-Ma'ad" and "Miftah Dar al-Sa'adah" that the medicine of the prophets is better and sounder than the medicine of others because it is based on revelation.

Regarding contagion: The Prophet (peace be upon him) did not deny contagion absolutely, but rather denied what the Arabs believed, that diseases transmit by themselves. He clarified that Allah is the Ordainer, and that sitting with the sick can be a cause of illness. This confirms contagion as a cause, but not an independent effector. Therefore, he commanded fleeing from a leper and forbade bringing a sick person to a healthy one. In conclusion, what is authentically reported from the Prophet (peace be upon him) regarding medicine is based on revelation, and even if some of it was ijtihad, it was affirmed by revelation.