PERMISSIBLE REASONS FOR BREAKING ONE’S FAST

1. You suddenly became sick. The nature of the sickness is such that if you do not break your fast you may die, or your condition will become worse. In such cases, it is permissible to break one’s fast.
2. Example of the above is sudden abdominal cramps. Taking medication and breaking the fast in this condition is permissible.
3. Another case: One suffered a snake bite. It is permissible to break the fast and take medication.
4. Similarly, you became so thirsty or so hungry that you fear you will die, or suffer some physical disability, then it is permissible to break the fast.

(Behshti Zewar)