What Breaks the Fast?
Things that invalidate the fast
- Deliberately eating or drinking anything.
- Smoking, including vaping, according to the scholarly consensus of contemporary councils.
- Marital relations during the fasting hours.
- Deliberately inducing vomiting (Sunan Abu Dawud 2380).
- Menstruation or post-natal bleeding beginning at any point in the day.
- Substances taken as nourishment, such as an IV drip given for nutrition.
Qada and kaffarah
Most invalidations require making up that day (qada). Deliberate marital relations during a Ramadan day additionally require the expiation described in Sahih al-Bukhari 1936: freeing a slave, or fasting two consecutive months, or feeding sixty poor people.
Where scholars differ
Contemporary scholars differ over some medical procedures — non-nutritional injections, inhalers for asthma, blood tests and endoscopy. Many councils permit them; others advise caution and making the day up. Follow the ruling of the scholars you refer to.
Attribution: the rulings summarised here are the positions recorded in the classical schools and the well known hadith collections. They are presented for information, not as a fatwa. For your own situation, ask a qualified scholar in your community.
Clear cases and edge cases
Deliberately eating, drinking or having sexual intercourse during the fasting window are clear invalidators. Menstruation and post-natal bleeding also prevent a valid fast. Modern medical questions—such as inhalers, nutritional infusions, scopes and some forms of medication—require more precise analysis and can have recognised differences of opinion.
Accident, forgetfulness and coercion matter
A ruling can change according to whether an act was deliberate, accidental or done in forgetfulness. The consequence can also differ between qada and kaffarah. A list of “yes/no” items without those distinctions can mislead users.
Frequently asked questions
Does an accidental sip break the fast?
Eating or drinking forgetfully does not break the fast; stop as soon as you remember and continue (Sahih al-Bukhari 1933).
Does bleeding or a blood test break the fast?
A small blood draw does not according to most contemporary scholars; large-volume donation is discouraged during fasting hours because of weakness.