Promethazine can be a phenothiazine derivative which differs structurally from your antipsychotic phenothiazines by the existence of a branched facet chain and no ring substitution. Dextromethorphan is a well-liked preference between non-prescription solutions; it works being an antitussive but does not have addictive properties like codeine does. من خلال اتباع https://businessbookmark.com/story5498964/promethazine-codeine-an-overview