Does severe irritation and itching resulting from atopic eczema during the daytime in Ramadan permit breaking the fast to take medication, or must one continue fasting and take medication before dawn despite the suffering?

If the itching is severe and necessitates taking a medication that breaks the fast during the day, and there is no alternative available at night, then this is considered an illness that permits breaking the fast. There is no blame in taking the medication, with the obligation to make up the day after Ramadan.