Gastren Duo Suspension is a 100ml pharmaceutical preparation by Pharmactive that contains calcium carbonate, magnesium carbonate, and sodium alginate. This suspension is formulated to help provide relief from gastric discomfort and related symptoms. The product comes in a 100ml suspension form packaged in a box with clear labeling. As this is a medicinal product, please consult with a healthcare professional before use for proper dosage and administration guidelines.