Drug guide

Opioids: Brand and Generic Names

Opioid analgesic brand–generic pairs often differ by release design. Learn IR products separately from ER products that contain the same opioid ingredient.

Opioid brand and generic names

Common opioid pairs (note release when listed)

Common opioid pairs (note release when listed)
Brand nameGeneric nameClass or typeRoute / form
RoxicodoneoxycodoneOpioid analgesicsImmediate release (oxycodone)
OxyContinoxycodoneOpioid analgesicsExtended release (oxycodone)
Norco / Vicodinacetaminophen, hydrocodoneOpioid analgesicsImmediate release (combination)
Percocetacetaminophen, oxycodoneOpioid analgesicsImmediate release (combination)
MS ContinmorphineOpioid analgesicsExtended release (morphine)
DilaudidhydromorphoneOpioid analgesicsImmediate release (hydromorphone)
DuragesicfentanylOpioid analgesicsTransdermal (fentanyl)
UltramtramadolOpioid analgesicsImmediate release (tramadol)

OxyContin is extended-release oxycodone; Roxicodone is an immediate-release oxycodone example. MS Contin is extended-release morphine.

Understanding IR versus ER opioid products

Immediate-release opioids are designed for prompt analgesia; extended-release products spread delivery over time. Combination products (Norco, Percocet) add acetaminophen—name both ingredients.

See medication release abbreviations (IR, ER, XR) for how release letters appear on other drug classes.

Naming patterns and memory tips

Many opioid generics end in -codone, -morphone, or -fentanyl is the ingredient in transdermal Duragesic.

Pair each ER brand with its generic before mixing IR and ER cards in one session.

Commonly confused opioid names

Oxycodone IR and OxyContin

Both contain oxycodone; OxyContin identifies the extended-release formulation.

Hydrocodone and oxycodone combinations

Norco pairs hydrocodone with acetaminophen; Percocet pairs oxycodone with acetaminophen.

Between study sessions

Learn the Top 200 throughout your day.

RxRecall rotates brand names, generic names, and drug classes on your iPhone Lock Screen. Tap a drug to take a closer look, then mark what you know.

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