What are the sources of Codeine?

Question

What are the sources of Codeine?

Answer 1

Opium poppies naturally, or through "total synthesis", that is production from simple starting materials through a series of reactions.

Answer 2

While codeine can be extracted from opium, most codeine is synthesized from morphine through the process of O-methylation.

Answer 3

It is an opioid that acts on the respiratory and cough centers in the brainstem's medulla.