NEW YORK (CNNMoney.com staff writer) - The Food and Drug Administration approved Vivitrol, a treatment for alcoholism from two companies, Alkermes and Cephalon, the drug companies said.

Vivitrol is meant to reduce the craving for alcohol and is injected once a month into alcoholics who are trying to quit drinking.

Cephalon (up $0.48 to $60.20, Research) and Alkermes (up $0.89 to $21.96, Research) said the drug should be available in June 2006. Alkermes is responsible for making the drug and Cephalon has primary responsibility for marketing and sales.

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