Answer
Yes. Sudden inability to pass urine is uncommon but serious and needs urgent medical assessment.
Sources for this answer
- Solifenacin succinate/Tamsulosin hydrochloride 6 mg/0.4 mg Modified-release tablet — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.