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Buy Vivitrol Online 

A once-a-month shot to treat opioid addiction was as effective in maintaining short-term abstinence from heroin and similar drugs as a more commonly prescribed daily treatment, according to a Norwegian study released Wednesday.

The study is believed to be the first to directly compare Vivitrol — administered as a monthly shot — with a combination drug treatment sold under the brand name Suboxone. In the U.S. and many other countries, Suboxone or methadone have been the standard medical treatment for people with an opioid use disorder.

Researchers in Norway found the two treatments were similar in terms of safety and efficacy in helping opioid-dependent people refrain from illicit drug use during a three-month period.

The results may provide a boost to Vivitrol manufacturer Alkermes Inc., which has been aggressively promoting the medication following its 2010 approval as a treatment for opioid-dependence relapse.