VIOGEN Semaglutide Pen 10mg is a medication used for the treatment of type 2 diabetes and for weight loss. It belongs to a class of medications known as glucagon-like peptide-1 receptor agonists, or GLP-1 RAs, and mimics the GLP-1 hormone released in the gut in response to eating. It works by helping the pancreas release the right amount of insulin when blood sugar levels are high, slowing the movement of food through the stomach, decreasing appetite, and causing weight loss. Semaglutide may cause side effects such as nausea, vomiting, diarrhea, abdominal pain, constipation, allergic reactions, acute kidney injury, pancreatitis, gallbladder problems, diabetic retinopathy, and abnormal behaviors.