Final answer:
The mild opioid agonists mentioned in the options are Codeine and Tramadol, which are commonly prescribed for mild to moderate pain and pose a lower risk of dependency. Morphine and Fentanyl are strong opioid agonists used for severe pain management and have a high potential for abuse.
Step-by-step explanation:
The mild opioid agonists among the options provided are 1) Codeine and 2) Tramadol. Codeine and tramadol are both considered to have less analgesic potency and lesser potential for abuse compared to more potent opioids. Morphine is a naturally occurring opioid with significant pain-relieving properties and is derived from the opium poppy. Fentanyl is a synthetic opioid, which is much stronger than morphine and is used for severe pain management.
Codeine is commonly used for mild to moderate pain and as a cough suppressant. It is often combined with other non-opioid pain relievers and is available in various formulations. Tramadol is a synthetic analog of codeine with similar pain-relieving properties and is typically prescribed for moderate pain. Unlike the more potent opioids, these milder agents are generally associated with a lower risk of dependency and side effects when used appropriately.
On the other hand, 3) Morphine and 4) Fentanyl are classified as strong opioid agonists. Morphine is also derived from the opium poppy and is used extensively for severe pain, such as that experienced post-surgery. Fentanyl is a powerful synthetic opioid, up to 100 times more potent than morphine and used in extreme pain scenarios or in opioid-tolerant patients. Both of these opioids have a high potential for abuse and are strictly controlled substances.