IBS is a common disease characterized by abdominal pain, bloating, and constipation. It significantly impacts patients' quality of life similar to clinical depression by disrupting daily activities like work, travel, and socializing. Zelmac is a new class of treatment for IBS with constipation that provides rapid and sustained relief of key symptoms like abdominal pain and constipation through its effects on serotonin in the body. It has a proven safety profile in clinical trials and no clinically relevant drug interactions.