Link: https://newlifemedix.com/pain-relief/opana-er-7-5-mg/ Opana ER 7.5 mg is a pill that helps to treat moderate and severe pain. It is low dose medicine after the 5 mg variant. If 5 mg doesn't treat, the doctor's recommended 7.5 mg pill that helps to reduce the pain. It is for long-lasting pain not for some regular pain. It is doctor prescription medicine so do not use it without doctor prescription. Side effects are dizziness, allergic, severe body pain, and vomiting.