Overview
Codeine is available over-the-counter or by prescription, depending on the state in which you live and the strength of the formulation. Codeine is approved by the U.S. Food and Drug Administration (FDA) to treat mild to moderately severe pain in cases where an opioid medication is appropriate. Codeine may be formulated into combination drugs with other medications such as acetaminophen.
Codeine is an opioid, or synthetic opiate, that works as an analgesic (painkiller). Codeine is believed to work by reducing the perception of pain.
According to the National Institute on Drug Abuse, regular use of opioids - even as prescribed by a doctor - can lead to dependence. If misused, opioids can cause overdose and death.
How do I take it?
Codeine is taken orally with or without food. Codeine may be taken every four to six hours as needed for pain.
Always follow your doctor’s instructions exactly when taking Codeine.
Side effects
The FDA-approved label for Codeine lists common side effects including nausea, dizziness, drowsiness, insomnia, loss of appetite, constipation, vomiting, stomach pain, moodiness, and difficulty urinating.
Rare but serious side effects listed for codeine include respiratory depression, central nervous system depression, and addiction.
For more details about this treatment, visit:
Codeine Sulfate — RxList
https://www.rxlist.com/codeine-sulfate-drug.htm