I think the following maaseh is relevent:
“The Orthodox professor Dr. Avraham S. Avraham mentions in his sefer Nishmas Avrohom the opinion of R. Sherira Gaon and Rabbi Avrohom, the son of Rambam, that the remedies that are mentioned in the gemara applied only in Talmudic times, and that nowadays, people should follow the medical advice of their present physicians.
R. Shlomo Zalman Auerbach wrote a letter with critical notes to Professor Avraham in which he stated that the aforementioned opinions are a minority view, but that according to halacha, if current medical wisdom runs counter to Talmudic remedies, one should use Talmudic medicines.
When Rabbi Yosef Yitzhak Lerner was in the process of publishing his work Shemiras Haguf Vehanefesh, he asked the Rosh Yeshiva for the sources on which he had based his opinion…. The Rosh Yeshiva replied that at the moment he was not able to recall the source…
(He later wrote a letter to R. Lerner citing the laws of the Shulchan Aruch that use Tamudic medicine as basis to permitting desecration of Shabbos for certain, presumably life-threatening disease)
R. Lerner wanted to publish this letter but someone advised him against it…”it is disrespectful to publicize a letter in which the Rosh Yeshiva admits that the does not recall something”…
As it turned out within only a few months R. Lerner received a letter from a Talmudic scholar indicating that the Rivash (447) explicitly disagrees with Rab Sherira Gaon and R. Avroham ben Harambam. A short time later another scholar remarked that Rashbo in Mishmeres Habayis 4:1 also disagrees with the two Rishonim.”
Reb Shlomo Zalman by Y. M. Stern, tr. A.Y Finkel, CIS Pulishers, 1996