Simethicone is an activated form of dimethicone used to treat flatulence orally. Dimethicone is a fluid type of silicone with a methyl as organic group radical. Silicones are polymers of silicon tied to oxygen atoms with high molecular weight (see information on silicone and dimethicone). At latest update, relevant published data on excretion into breast milk were not found. Because it is not absorbed through the skin or orally along with a high molecular weight, excretion into breast milk in significant amount or absorption by the infant gut is highly unlikely. It is also a drug approved for use in young infants.