There are currently no generic Vivitrol (naltrexone injection) products available in the United States. This is because patents are currently in place that prevent a company from manufacturing a generic version of this drug until at least May 2017, when the first patent is scheduled to expire. Although Revia contains the same active ingredient as Vivitrol, these medications are not the same.
Vivitrol® (naltrexone injection) is a prescription injectable opioid antagonist medication. It is used in the treatment of alcohol and opioid dependence.
Vivitrol is made by Alkermes, Inc. The medication is under the protection of patents that prevent any generic Vivitrol from being manufactured in the United States.
The first patent for Vivitrol is set to expire in May 2017. This is the earliest predictable date that a generic version could become available.
However, other circumstances could come up to delay or shorten this exclusivity period. This could include such things as lawsuits or other patents for new Vivitrol uses. Once Vivitrol goes off-patent, there may be several companies that manufacture a generic version of the drug.
No -- naltrexone is the active ingredient in Vivitrol, not a generic version of it. What can be confusing is that the active ingredient of a drug is often referred to as the "generic name." The generic name is different from a generic version of a medicine. In order for there to be a generic version of a medicine, the original medicine must have gone off-patent, and another company besides the original manufacturer would make the product.
Revia® and Vivitrol contain the same active ingredient (naltrexone), but they are not the same medication.
Vivitrol is an injectable form of naltrexone. It is given as an intramuscular injection (an injection into the muscle).
Revia, on the other hand, contains naltrexone in the form of a tablet. It is taken by mouth. Unlike Vivitrol, Revia is no longer protected by patents, and is available in generic form (see Generic Revia).