Answer and Explanation :
When the patient is unconscious and not able to take medicine in form of tablets or capsule then colon comes into action, colon is a good way of administration of drugs when the patient is ill and can not take the medicine.
- the colon is present bellow the liver so the drugs can effect more easily before the metabolism.
- lymphatic circulation is used for draining of colon
- when colon is present there is a less chance of degradation of drugs