Probably what you see is the tablet shells. For sustained release formulation, it is common that you may notice empty capsule/tablet shells in feces. These shells are made of insoluble polymers which helps in controlling the release of active ingredient (Metformin). You may discuss this with your physician on next visit.
- Metformin Information for Consumers
- Metformin Information for Healthcare Professionals (includes dosage details)
- Side Effects of Metformin (detailed)
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