The correct answer is - morphine (assuming asking about natural opoid)
Explanation:
Morphine is the natural opoid which is occur naturally in numbers of the plants and animals. This is used as the depressants or the medication to the decrease the feeling of the pain in an individual that suffering from the pain. It can be used in acute or the chronic pain.
Methadone is a synthetic long lasting opoid that use in as the medication that is used to prevent withdrawal symptoms and craving for the opoid-addicted individuals.
