Regtect helps by improving the chemical balance in the brain to suppress a patient's craving, whereas conventional drugs discourage drinking by causing unpleasant symptoms, such as palpitations, nausea and headaches.
The first alcohol-dependence drug to be launched in Japan in 30 years, Regtect was sold in 24 other countries before getting a green signal in the alcohol-happy nation, 'Kyodo' news agency reported.
Alcohol dependence is a mental disease that renders sufferers unable to control their drinking.
While there are an estimated 800,000 alcoholics in Japan, only around 40,000 a year get treatment, the report said.
The disease can cause serious health problems, including liver, pancreas and brain damage.
