Cystospaz is a medication used to treat bladder spasms. However, there are several synonyms for this drug, including hyoscyamine, Levsin, Anaspaz, and Cystospaz-M. Each of these medications contains the same active ingredient, which is hyoscyamine. This ingredient blocks certain nerve impulses in the body, helping to reduce bladder spasms and other related symptoms. It is important to note that while all of these medications work in a similar manner, they may have different dosing instructions or side effects. Therefore, it is crucial for patients to discuss any questions or concerns they have regarding their medication with their healthcare provider.