Is it necessary to break the fast to compensate for fluid loss due to diarrhea resulting from taking a laxative during fasting?

Allah has permitted the sick to break their fast in Ramadan, but not all illnesses allow for breaking the fast. The illness that permits breaking the fast is one whose harm is increased by fasting, or for which there is a fear of delayed recovery, or one that causes unbearable hardship and difficulty to the fasting person, such as severe fever.