Drugs are categorized by group, which determines their drug development status. Here is the list of possible groups:
A drug that has been approved in at least one jurisdiction, at some point in time. This does not mean the drug is currently approved or available, just that it has been approved and marketed at some point, somewhere. Different jurisdictions also have a different concept for "approval". For example drugs that are available over-the-counter in the U.S. may not be technically approved, whereas over-the-counter drugs in Canada are considered approved.
A drug that has been approved in at least one jurisdiction, at some point in time for the treatment of animals.
A drug that is a pharmaceutical-grade and standardized nutrient (with confirmed or unconfirmed health benefits)
A drug that is scheduled in at least one jurisdiction, at some point in time.
A previously approved drug that has been withdrawn from the market in at least one jurisdiction, at some point in time. Note that because a drug can be approved in one jurisdiction, and withdrawn in another, it's possible for a drug to be in both groups. If a drug has been approved at some point in time, and then withdrawn, it would also be in both drug groups.
A drug that is in some phase of the drug approval process in at least one jurisdiction.
A compound that has been shown experimentally to bind specific proteins in mammals, bacteria, viruses, fungi, or parasites. This includes compounds that are Pre-Investigational New Drug Applications (Pre-IND, or Discovery Phase compounds).