A woman took necessary medication at the time of the Fajr adhan on a plane, so what is the ruling on her fasting?

Question:
I ask Allah to do you good. Your Eminence, father, the questioner says: We were on a plane, and they announced that it is now the time for imsak (abstaining from food and drink) upon the entry of Fajr, and this was in Ramadan. My sister was with me, and she did not know that Fajr had entered. She had a type of necessary treatment for her health that she used to take a little before Fajr. She took it quickly and drank water after it. What is the ruling on her fasting?

Answer:
If the announcement was made with caution, because their custom is to announce it a little before the actual time as a precaution, then if there was caution, let the time be [considered valid]. Yes. But if she took the medication after Fajr had risen, she must make up this day. Yes.