In Australia, Canada, New Zealand, Sweden, the United Kingdom, the United States and many other countries, codeine is regulated under various narcotic control laws. In some countries, it is available without a medical prescription in combination preparations from licensed pharmacists in doses up to 20 mg, or 30 mg when sold combined with 500 mg paracetamol. Of the European Union member states, 12 countries (Bulgaria, Cyprus, Denmark, Estonia, Ireland, Latvia, Lithuania, Malta, Poland, Romania, Slovenia) allow the sale of OTC codeine solid dosage forms. Australia
In Australia, since 1 February 2018, preparations containing codeine are not available without a prescription.Preparations containing pure codeine (e.g., codeine phosphate tablets or codeine phosphate linctus) are available on prescription and are considered S8 (Schedule 8, or "Controlled Drug Possession without authority illegal"). Schedule 8 preparations are subject to the strictest regulation of all medications available to consumers. Prior to 1 February 2018, Codeine was available over-the-counter (OTC). Canada
In Canada, codeine is regulated under the Narcotic Control Regulations (NCR), which falls under the Controlled Drugs and Substances Act (CDSA). Regulations state the pharmacists may, without a prescription, sell low-dose codeine products (containing up to 8 mg of codeine per tablet or up to 20 mg per 30 ml in liquid preparation) if the preparation contains at least two
additional medicinal ingredients other than a narcotic (S.36.1 NCR).In Canada tablets containing 8 mg of codeine combined with 15 mg of caffeine and 300 mg of acetaminophen are sold as T1s (Tylenol Number 1) without a prescription.
Examples of Schedule V substances include: cough preparations containing not more than 200 milligrams of codeine per 100 milliliters or per 100 grams (Robitussin AC®, Phenergan with Codeine®), and ezogabine. References
Notes
Further reading
Dean L (2012). "Codeine Therapy and CYP2D6 Genotype". In Pratt VM, McLeod HL, Rubinstein WS,  et al. (eds.). Medical Genetics Summaries. National Center for Biotechnology Information (NCBI). PMID 28520350. Bookshelf ID: NBK100662. External links

"Codeine". Drug Information Portal. U.S. National Library of Medicine.