Homeopathic. Natural relief for gas and digestive upset. Relief of symptoms of flatulence, gas and dyspepsia due to overeating or improper diet. Formerly Hyland's Nux and Carbo Veg, Hyland's Upset Stomach is a traditional charcoal based homeopathic formula for the relief of symptoms of flatulence, belching and gas due to improper digestion or gastric upset. Working without contraindications or side effects, Hyland's Upset Stomach stimulates your body's natural healing response to relieve symptoms. Hyland's Upset Stomach is safe for adults and children and can be used in conjunction with other medications. Made in the USA.