Codeine continues to be claimed to indicate no evidence of carcinogenicity or mutagenicity in a number of test systems, such as the micronucleus and sperm abnormality assays and also the Salmonella assay. Promethazine was nonmutagenic in the Salmonella exam system of Ames. Use Tylenol w/ Codeine (acetaminophen and codeine tablets) https://wockusa.com/product-category/codeine/