What is the ruling on the fasting of a liver transplant patient who is physically able to fast, if he must take an immunosuppressant medication (capsules) every 12 hours, which would mean breaking his fast? And can the time between doses be extended, knowing that this may have health consequences?

It is permissible for a sick person who needs to take medication during the fasting period to break their fast and take their medicine if the period required for taking the medication is less than the fasting period, and they are certain or highly assume that delaying the medication will lead to an increase in their illness, a delay in recovery, or the onset of a new illness. One must refer to specialists to determine these matters. However, if delaying the medication for an hour or two does not affect the patient, then they must fast at that time.