Gastren Duo Suspension is a 100ml oral medication containing calcium carbonate, magnesium carbonate, and sodium alginate. This pharmaceutical formulation is designed to help manage gastrointestinal conditions. This is a prescription medication that should only be taken under the guidance and supervision of a qualified healthcare provider. The product comes in a brown glass bottle with a white cap and is packaged in a teal and gray box. Always read the package insert carefully and follow the prescribed dosage instructions.