Never Retain leftover opioid medication. Only one dose can cause death in someone using this medicine accidentally or improperly. Embryo-Fetal Toxicity Tell female patients of reproductive potential that acetaminophen and codeine phosphate tablets can cause fetal harm and to inform the prescriber of the recognised or suspected pregnancy (see Safeguards, https://codeine.store/codeine-guaifenesin-10-100-mg-5ml-para-que-sirve/