Answer
Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh.
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
Fainting does not automatically break the fast, but if a person faints for an entire day without regaining consciousness, their fast is considered invalid by some scholars. If they regain consciousness even briefly and make the intention to fast, it is valid.
Shedding more light on the issue, we would like to quote the following from the Kuwaiti Encyclopedia of Jurisprudence:
All scholars are of the view that fainting does not exempt the person from fasting. In this way, if a person faints for the whole month and then sobers up, he has to make up for all the days he missed. The jurists further comment on this saying that fainting may necessitate delaying fasting but not ignoring it altogether.
To exempt someone from fasting, the person concerned must be either not physically well or religiously not responsible for his deeds.
A person who intends to fast during night then faints during the day but gets conscious even for one moment and makes the intention for fasting during it, his fasting is acceptable.
With regard to the one who makes the intention during the night but falls into swoon for the whole day, his fasting is not acceptable according to Shafi`i and Hanbali scholars. They quote the following Qudsi (sacred) hadith in support of their view: “Almighty Allah says: ‘Fasting is Mine and it is I who give reward for it, for he (a fasting person) abstains from food and drink for My sake.”
In this hadith, it is mentioned that a person abstains from food and drink for Allah’s sake. A fainted person lacks such a characteristic and thus his fasting is invalid. Abu Hanifah, however, says that his fasting is valid because he has made the intention while still awake and fainting, in this case, resembles sleeping in case of a sleeping person.
Allah Almighty knows best.
Editor’s note: This fatwa is from Ask the Scholar’s archive and was originally published at an earlier date.