Hello!

Thank you for the query.

Contiflo contains an alpha-blocker. It is specific to dose receptors localized in urinary tract muscles but in can have minor effect for others type of alpha receptors. Such receptors are present in many human body tissues especially in muscles and nerves. And as we do not know what exactly causes anxiety, all nervous system affecting medicines can also result with nervous system diseases including anxiety. Moreover, any stress situation can intensify anxiety. Kidney stones and symptoms associated with them are such unusual for human body situation causing some kind of stress.
By the way, anxiety is a severe disease which should be treated with psychiatrist support and medicines (Sertaline for example) if necessary. You should know that you desire to feel comfortable and should not suffer from anxiety.

Hope this will help. Feel free to ask further questions.
Regards.

---