https://writeupcafe.com/overvi....ew-of-opana-er-warni
Opana ER is a prescription opioid medication that is used to relieve pain. It belongs to a group of medications known as opioid agonists, which work by binding to the opioid receptors in the brain and spinal cord. This increases the levels of dopamine, a chemical that helps control pain and pleasure.
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