Benfothiamine is a form of vitamin B1 (thiamine) that is often used to treat thiamine deficiency, especially in people with alcohol use, as it is better absorbed than regular thiamine. It can help improve symptoms related to thiamine deficiency, such as nerve pain or neuropathy.

However, slow and frequent urination over 10 years is unlikely to be directly improved by benfothiamine. These urinary symptoms may be caused by other underlying conditions such as bladder issues, prostate problems (in men), urinary tract infections, or neurological problems affecting bladder control.

Given your history of thiamine deficiency and alcohol use, it is important to:

• Continue managing thiamine deficiency with appropriate supplementation like benfothiamine as advised by your doctor.
• Consult a urologist to evaluate your urinary symptoms thoroughly. This may involve urine tests, imaging, or other diagnostic procedures to identify the cause.

In summary, benfothiamine helps with thiamine deficiency but is unlikely to directly resolve your urinary symptoms. A detailed medical evaluation is needed to identify and treat the cause of your slow, frequent urination effectively.To narrow down potential causes, we will need some more information.Please tell me your age and gender.