Levsinex SR, also known as hyoscyamine, is a medication used to treat a variety of gastrointestinal disorders such as irritable bowel syndrome, colitis, and peptic ulcers. The medication works by relaxing the stomach and intestinal muscles, which can alleviate symptoms such as cramping and bloating. Synonyms for Levsinex SR include hyoscyamine sulfate, Levbid, and Anaspaz. These medications contain the same active ingredient and are often prescribed interchangeably. It is important to note that Levsinex SR may not be suitable for everyone, and it is essential to follow the advice of a healthcare professional when taking any medication.