Homeopathic. Natural relief for gas and stomach upset. Formerly Hyland's No. 10, Hyland's Gas is a traditional 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 Gas stimulates your body's natural healing response to relieve symptoms. Hyland's Gas is safe for adults and children and can be used in conjunction with other medications. Made in the USA.