This medicine is used to treat the symptoms of Irritable Bowel Syndrome (IBS), including cramps & spasms of the large bowel. This medicine is for use by adults & children aged 15 years and over. Colpermin IBS Relief Capsules are an antispasmodic which are used to relieve spasms & cramps which occur in the large bowel in Irritable Bowel Syndrome (IBS). The capsules contain peppermint oil, which relaxes the spasm of the bowel wall. This relieves pain & allows pockets of gas, which may have made you feel bloated, to pass along the bowel & out of the body. Irritable Bowel Syndrome is a condition in which there is pain,  spasm & bloating at almost any point between the groin, the navel & the sides, sometimes accompanied by diarrhoea and constipation. The symptoms may be more noticeable when you are feeling stressed & anxious.