What is the ruling on using nasal sprays – does that affect the fast?.
Praise be to Allaah.
There is nothing wrong with doing that in cases of necessity, but if it can be delayed until night time, that is more on the safe side. End quote.
Shaykh ‘Abd al-‘Azeez ibn Baaz (may Allaah have mercy on him)
Majmoo’ Fataawa wa Maqaalaat Mutanawwi’ah (15/264).