Definition

1. Noun:
   • A drug or chemical whose possession, use, or distribution is regulated by law: A "controlled substance" is a specific drug or chemical compound that government authorities have placed under legal control due to its potential for abuse, dependence, or harm. These substances are typically categorized into schedules or classes based on their accepted medical use and their risk.

Examples of Usage

• Noun:
  • Possession of that controlled substance without a valid prescription is a felony.
  • The pharmacy must keep detailed records for every controlled substance it dispenses.
  • Heroin is classified as a Schedule I controlled substance in the United States.

Advanced Usage

• "to be listed as a controlled substance": to be officially categorized and regulated by law.
  • Fentanyl analogues are now listed as controlled substances in many countries.
• "trafficking in a controlled substance": the illegal trade or distribution of a regulated drug.
  • He was convicted of trafficking in a controlled substance.

Variants and Related Words

• Control (verb): To exercise authoritative or dominating influence over; to regulate.
  • The government controls the distribution of these medicines.
• Substance (noun): A particular kind of matter with uniform properties; often used to refer to a drug or chemical.
  • An unknown substance was found at the scene.

Synonyms

• Regulated drug: A drug whose use is controlled by law.
• Scheduled substance: A substance listed on an official government schedule of controlled drugs.

Related Phrases

(Note: "Controlled substance" is a fixed noun phrase and does not commonly form phrasal verbs. Related legal and procedural phrases are listed here.) - Charge of possession of a controlled substance: A formal accusation for having an illegal drug. - He faces a charge of possession of a controlled substance. - Prescription for a controlled substance: A doctor's written authorization to obtain a regulated medication. - You need a special prescription for a controlled substance like oxycodone.

Noun

1. a drug or chemical substance whose possession and use are controlled by law