Ibn Qayyim in "Medicine of the Prophet" said that there is difference of opinion whether dates are hot and moist or hot and dry.

As-Suyuti in "Medicine of the Prophet" said, "Dates are hot and dry. They increase sexual power, especially if combined with kernels of pine seeds. But if a man eats them while suffering from ophthalmia, he will suffer from headache and other harm. The Prophet forbade ‘Ali to eat dates when he was suffering from ophthalmia”.

As-Suyuti also said

“Fresh Dates are hot and moist. They generate wind. They rectify a hot constitution when combined with an oxymel or with bitter pomegranates.
Al-Bukhari has classified Ajwa dates as a wonder drug.
There is universal agreement that the use of medicine is lawful. Some are of the opinion that it is desirable to make use of drugs because of the well-known saying of the Prophet: Use medicine. And also because he himself used to take medicine both in health and in sickness. When in good health he used to use dates, pumpkins and water melons.
Said Ja‘far bin Mohamed, having heard the story from his father: Someone presented the Prophet with a packet of dates at a time when someone had had fever. The Prophet gave him one date, then another and another until he had allowed him to eat seven. Then he said: That is enough for you. This he did because there is in dates a something which harms people with fever and brings upon them headaches and thirst. But if they take only a few, this harm does not come upon them.
If one of your women has given birth to a child, see that the first thing that she eats be fresh and moist dates, for verily there is no food better. For Mary ate these when she brought forth Jesus.
The Prophet said: Let your women-folk eat dates, for whoever makes dates their food will produce sons with ease.”