Drug possession under Florida Statute § 893.13 covers knowingly possessing a controlled substance. Most possession charges are third-degree felonies (up to 5 years prison and $5,000 fine), but penalties rise sharply for substances like fentanyl or for quantities indicating intent to sell. Defenses frequently attack the legality of the search and seizure, constructive-possession proof problems, lab analysis failures, and entrance into pretrial drug-diversion or treatment programs.