Questioner:

What is the ruling on fainting and vomiting [whilst fasting]?

Shaykh Muqbil bin Hādī al-Wādiʿī

With regards to fainting and vomiting, they do not break the fast. As for the ḥadīthThe one who cannot help vomiting does not have to make up the fast, but the one who vomits deliberately has to make it up” this is weak.