Codeine
- Emma Wang
- May 25, 2023
- 2 min read
Updated: May 28, 2023

(image source: Akron)
Codeine Cough Syrup:
Codeine Phosphate 10mg each 5 mL

(image source: iStock)
Codeine Tablets:
Codeine Phosphate 30 mg per tablet
Overview:
Codeine is a kind of opioid medication that relieves cough, pain, and diarrhea. Codeine is an alkaloid present in opium. It can be extracted from opium and chemically produced from morphine. Codeine is found in both prescription and non-prescription drugs.
Medical Uses:
It can treat:
Cough
Diarrhea
Mild to moderate pain
Irritable colon disorder
Side Effects:
Common side effects that usually don’t need medical attention:
Dizziness
Drowsiness
Nausea and vomiting
Stomach pain
Sweating
Mild itching or rashes
Common side effects that need medical attention immediately:
Difficult or trouble breathing
Irregular, fast or slow, or shallow breathing
Pale or blue lips, fingernails, or skin
Long-term side effects
Since Codeine is opioid medication, it can cause physical dependence, which can lead to
long-term harm to the human body. Some long-term effects include:
Worsening pain: known as opioid-induced hyperalgesia
Substance dependence
Lack of emotion (apathy)
Depression
Learning and memory problems
Difficulty in controlling impulsive behavior
Increased tolerance to opioids
Insomnia
Severe constipation
Poor nutrition, weight loss
Irregular menstrual cycles in women
Irregular heartbeat, cardiac arrest
Symptoms of overdose, which need emergency help:
Bloody or cloudy urine
Chills
Constricted, pinpoint, or small pupils (black part of the eye)
Dark urine
Headache
Increased sweating
Light-colored stools
Loss of appetite
Loss of consciousness
Nausea
Seizures
Stomach pain
Sudden decrease in the amount of urine
Unpleasant breath odor
Vomiting
Vomiting of blood
Yellow eyes or skin
Drug Interactions:
It’s usually not recommended to use Codeine with the following drugs as it may pose risks.
However, under some conditions, health professionals may use some with Codeine at a
particular dosage.
*Disclaimer: the list is inconclusive

Dosing:
Codeine can come in powder, tablet, solution, and injection. The most common types are solutions and tablets.
For oral dosage form (cough syrup)
- Adults—15 mL3 or 4 times per day.
- Children 7 to 12 years of age—10 mL 3 or 4 times per day.
- Children 3 to 6 years of age—5 mL 3 or 4 times per day.
- Children younger than 3 years of age—Use and dose must be determined by your doctor.
For oral dosage form (tablets):
- Adults—1 or 2 tablets every 4 hours as needed. Your doctor may adjust your dose as needed.
- Children—Use and dose must be determined by your doctor.
Codeine is generally not recommended for children under the age of 12, and Codeine should be avoided in children under 1 year of age.
Notes:
The legal status of Codeine:
Codeine is a less addictive Schedule II and Schedule III drug under the United Nations Single Convention on Narcotic Drugs of 1961 and is strictly regulated worldwide. For instance, in Australia, Canada, New Zealand, Sweden, the United Kingdom, the United States, and many countries, Codeine is regulated. However, many countries or regions allow people to buy certain codeine-containing medicines without a doctor's prescription, such as cough syrup.
The codeine content of those medicines is low, and the quantity of each sale is usually
limited. Because these drugs can easily extract high concentrations of Codeine from them and become one of the raw materials for processing into addictive medicines, many countries still prohibit people from bringing such drugs into the country, such as Thailand.
Citation:
Canada, H. (2023, February 8). Government of Canada. Uses, effects and risks - Canada.ca.Retrieved March 28, 2023, from
https://www.canada.ca/en/health-canada/services/substance-use/controlled-illegal-drugs/codeine.html
Wikimedia Foundation. (2023, February 9). Codeine. Wikipedia. Retrieved March 28, 2023, from https://en.wikipedia.org/wiki/Codeine
Mayo Foundation for Medical Education and Research. (2023, March 1). Codeine (Oral
Route) side effects. Mayo Clinic. Retrieved March 29, 2023, from https://www.mayoclinic.org/drugs-supplements/codeine-oral-route/side-effects/drg-20074022
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