Sancoba is a clear, red liquid eye drop. The main ingredient of the drug is cyanocobalamin, commonly known as vitamin B12, which improves the regulatory function of the eye, supporting eye nerve cells.

Cyanocobalamin is a synthetic form of vitamin B12, used to prevent and treat vitamin B12 deficiency in the blood. Cyanocobalamin requires a prescription from a doctor/pharmacist to ensure effectiveness when used.