 And managing constipation with belly pain from my irritable bowel syndrome with constipation, or IBSC, with laxatives and fiber isn't enough. My doctor recommended a way to get ahead of it. Then I said yes to Linzess. Linzess Linaclotide is a prescription medicine that treats IBSC in adults. It's not a laxative. It's a once-daily pill that helps you get ahead of your symptoms. It's proven to help you have more frequent and complete bowel movements and helps relieve overall abdominal symptoms, belly pain, discomfort, and bloating.