Unapproved or misbranded drugs

Every prescription drug and most over-the-counter drugs sold in the US need either an approved application (an NDA or ANDA) or must fit an OTC monograph. A product that skips both is pulled regardless of whether anything is physically wrong with it, because its dose, purity and claims were never checked. Typical cases: compounded products sold at commercial scale, imported drugs not cleared for the US, and products whose labeling makes claims that turn them into unapproved new drugs. Supplements that turn out to contain a hidden prescription drug are filed under chemical contamination and hidden ingredients instead.