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Effects vary widely by individual, dose, and context.
The physical effects of oxycodeine can be broken down into several components which progressively intensify proportional to dosage. The general head space of codeine is described by many as one of intense euphoria, relaxation, anxiety suppression and pain relief.
The cognitive effects of codeine can be broken down into several components which progressively intensify proportional to dosage.
These combinations are considered extremely harmful and should always be avoided. Reactions to these drugs taken in combination are highly unpredictable and have a potential to cause death.
There is considerable risk of physical harm when taking these combinations, they should be avoided where possible.
These combinations are not usually physically harmful, but may produce undesirable effects, such as physical discomfort or overstimulation. Extreme use may cause physical health issues. Synergistic effects may be unpredictable. Care should be taken when choosing to use this combination.
Oxycodone is highly addictive with significant potential for abuse and psychological dependence. Compulsive redosing is commonly reported, and many users find themselves consuming more than intended. The drug induces feelings of euphoria and relaxation that strongly reinforce continued use.
Physical dependence develops rapidly with regular use, reportedly faster than with morphine. Withdrawal symptoms include anxiety, panic attacks, nausea, insomnia, muscle pain and weakness, restlessness, irritability, depression, sweating, cold shivers, vomiting, diarrhea, and painful cramps. Severe withdrawal is expected after abrupt cessation in dependent individuals.
Oxycodone overdose is life-threatening, with respiratory depression being the primary mechanism of death. In 2011, it was the leading cause of drug-related deaths in the United States. The oral lowest dose causing toxic effects in humans is reported at 0.14 mg/kg. Lethal doses are highly variable depending on tolerance; doses tolerated by chronic users can be fatal for opioid-naive individuals. Risk increases substantially when combined with other CNS depressants.
| Species | Route | Value |
|---|---|---|
| mouse | oral | 426 mg/kg |
| mouse | intraperitoneal | 320 mg/kg |
Dose-dependent respiratory depression occurs at all doses, becoming clinically significant at higher doses or in opioid-naive individuals; overdose can result in respiratory arrest and death.
Constipation is extremely common (affecting approximately 23% of users) and persists with continued use as tolerance to this effect develops slowly; chronic use has been implicated in life-threatening bowel perforations.
Acute cardiovascular effects including bradycardia, hypotension, and histamine-mediated flushing can occur; serious cardiovascular depression is primarily associated with overdose situations.
Chronic use, particularly at higher doses, commonly causes hormonal disruption including hypogonadism and decreased libido.
Hallucinations, confusion, and delirium are documented but uncommon side effects. These psychiatric manifestations are less frequent with oxycodone compared to some other opioids.
Seizures and convulsions are uncommon but have been reported.
Oxycodone was first synthesized from the opium poppy alkaloid thebaine by Martin Freund and Edmund Speyer at the University of Frankfurt in Germany, with their synthesis published in 1916. Clinical application of the drug followed the next year, when it was initially employed for postoperative pain…
1931 Convention for Limiting the Manufacture and Regulating the Distribution of Narcotic Drugs (League of Nations)
1961 Single Convention on Narcotic Drugs (United Nations, Schedule I)
Listed in Schedule I of the Commonwealth's Narcotic Drugs Act 1967 pursuant to international treaty obligations. Additionally classified as Schedule 8 under the Poisons Standard, designating it as a controlled drug available for medical use but requiring restriction of manufacture, supply, distribution, possession, and use to reduce potential for abuse and dependence.
Controlled substance under Schedule I of the Controlled Drugs and Substances Act. Note that Canadian scheduling differs significantly from the United States system. Possession and distribution without authorization carry criminal penalties.
Regulated under Part I of Schedule 1 of Chapter 134, the Dangerous Drugs Ordinance. Unauthorized possession, manufacture, and trafficking are criminal offenses.
Classified as a Schedule II controlled substance under Russian narcotics legislation. Medical use is permitted under strict regulation.
Specifically named as a controlled substance under Verzeichnis A of Swiss narcotics legislation. Medicinal use is permitted with appropriate prescription.
Controlled under the Misuse of Drugs Act as a Class A substance, considered among those most likely to cause harm. Possession without prescription is punishable by up to seven years imprisonment, an unlimited fine, or both. Dealing carries penalties up to life imprisonment. Also listed as Schedule 2 under the Misuse of Drugs Regulations 2001, permitting medical prescription.
Legal for medical use under the Arzneimittelgesetz (Medicines Act). Possession or sale without a valid prescription is prohibited under the Suchtmittelgesetz (Addiction Substances Act).
Listed in Appendix III of the Betäubungsmittelgesetz (Narcotics Act), meaning it is a controlled narcotic available for medical prescription. Only licensed physicians, dentists, and veterinarians may prescribe oxycodone, and the federal government regulates prescriptions through reporting requirements.
Classified as a List I substance under the Opium Act, designating it as a 'hard drug' associated with significant health risks. Despite this classification, physicians retain the ability to prescribe oxycodone for legitimate medical purposes under the Medicines Act.
Listed as a Class A drug, attracting the most severe penalties under Singapore law. Unauthorized manufacture carries a minimum sentence of 10 years imprisonment plus 5 strokes of the cane, with maximum penalties of life imprisonment or 30 years plus 15 strokes. Trafficking offenses carry minimum penalties of 5 years imprisonment plus 5 strokes, and maximum penalties of 20 years plus 15 strokes.
Designated as a 'red prescription' substance, indicating the highest level of prescription control in Turkey. Possession or sale without a valid red prescription is illegal.
Controlled under the Controlled Substances Act since 1970. Illegal to sell without a DEA license and illegal to purchase or possess without a valid prescription. The FDA revoked approval of the original sustained-release OxyContin formulation in 2010 due to widespread misuse, with reformulated abuse-deterrent versions subsequently approved.
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