Opana ER 40 mg is a potent opioid medication used to manage severe pain that requires around-the-clock treatment. This extended-release tablet is designed to provide long-lasting relief by slowly releasing the medication into the body over an extended period of time. When purchasing Opana ER 40 mg online without a prescription, it is important to be cautious and ensure that you are obtaining the medication from a reputable source. The price of Opana ER 40 mg without a prescription may vary depending on the seller, so it is essential to compare prices and ensure that you are getting a fair deal.