Does applying ointment or medicated patches invalidate the fast? Can using ointment or medicated patches break the fast? Can ointment or medicated patches disrupt the fast?
Ointment, cream, etc. when put on the body are absorbed by the pores on the skin and capillary veins under the skin, and mix with the blood. But this absorption is too slow and low in amount. Besides, this process is not considered as a nutritive act such as eating and drinking. In this regard, ointment and medicated bands put on the skin do not invalidate the fast (Decision by HBRA dated 22. 09. 2005; see. Marghinani, al-Hidayah, II, 263-264; Kasani, Bada’i, II, 98; Ibn Abidin, Radd al-Muhtar, III, 366,367).
Source: Presidency Of Religious Affairs The Turkey, High Board of Religious Affairs FATWAS