The Prophet (ﷺ) said: Allah has sent down both the disease and the cure, and He has appointed a cure for every disease, so treat yourselves medically, but use nothing unlawful.
Sunan Abi Dawud Book 29, Hadith 20
← Previous Hadith Wa'il said: Tariq ibn Suwayd or Suwayd ibn Tariq asked the Prophet (ﷺ) about wine, but he forbade it. He again asked him, but he forbade him. He said to him: Prophet of Allah, it is a medicine. The Prophet (ﷺ) said: No it is a disease.

Sunan Abi Dawud Book 29, Hadith 19 Next Hadith → I suffered from an illness. The Messenger of Allah (ﷺ) came to pay a visit to me. He put his hands between my nipples and I felt its coolness at my heart. He said: You are a man suffering from heart sickness. Go to al-Harith ibn Kaladah, brother of Thaqif. He is a man who gives medical treatment. He should take seven ajwah dates of Medina and grind them with their kernels, and then put them into your mouth.

Sunan Abi Dawud Book 29, Hadith 21