What is codeine?


Codeine is a naturally occurring opiate and a less potent analgesic than morphine. It is commonly used to treat mild to moderate pain and as a cough suppressant.

Historical context

Codeine was first isolated in 1832 by French chemist Pierre Robiquet and has since become a widely used medication for pain and cough relief.

Medical formulations

Codeine can be found in oral tablets, oral solutions, and as an ingredient in combination products with acetaminophen (e.g., Tylenol®️ with Codeine) or aspirin.

How long does codeine stay in your system?

Codeine has a half-life of about 2.5 to 3 hours, meaning it takes this amount of time for half of the drug to be eliminated from the body. It generally takes about 5 to 6 half-lives for a drug to be completely eliminated from the body, so codeine can be expected to stay in the body for about 12 to 18 hours.

Street names

Codi, Captain Cody, Schoolboy


Codeine pills are typically round or oblong, and may come in various colors, such as white or yellow, depending on the formulation and dosage. They may be imprinted with the dosage and the manufacturer's logo. 

Common pills

  • White, round pill with "3" imprinted on one side (codeine 30 mg with acetaminophen 300 mg)
  • White, round pill with "4" imprinted on one side (codeine 60 mg with acetaminophen 300 mg)
  • White, round pill with "M" and a score on one side, "30" on the other side (30 mg codeine phosphate)

Warning: Consuming illicit drugs, including pressed pills, may result in unintended fentanyl exposure, leading to potentially fatal consequences. Exercise caution and consider using fentanyl testing strips to identify the presence of this dangerous substance in street drugs.

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