I found this if your having problems peeing
I have had prostrate problems, and still do.
Niaspan Controlled-Release Tablets may interfere with certain lab tests, including plasma or urinary catecholamine tests or urine glucose tests. Be sure your doctor and lab personnel know you are taking Niaspan Controlled-Release Tablets
decrease in urine or dark-colored urine
- Niaspan Information for Consumers
- Niaspan Information for Healthcare Professionals (includes dosage details)
- Side Effects of Niaspan (detailed)
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