GAVISCON双作用胃药 缓解胃酸 消化不良 心胃灼热 心胃反流 GAVISCON 心消化不良 A惢 Sodium Alginate 250mg Sodium Bicarbonate 106.5mg Calcium Carbonate 187.5mg Heartburn PEPPERMINT FLAVOUR 32 Chewable Tablets Indigestion