Plunging in to the habit of alcohol is not a disease; it is a symptom of internal issues which are in the storehouse of the brain like some unresolved emotional issues, habit of rigidity, uncompromising with the reality, lack of communication with the first society (Your own family) and like.
Alcohol intake starts for funsake, leading to pass time activity and further for getting rid of some sort of worries for time being. One day you find yourself, saying "One for the road", one before taking bath", "one before toilet". There are several reasons for you to get drunk, but only one reason for not getting involved is your determination not to touch it.
Human beings are like the PC connected to internet. We download an application but do not install it. However, it is a fact that while installing, it may ask several questions, several minutes or hours together. Once installed, you are free; as you have fixed the problem. The knowledge of adverse effects are known to everyone. But how many of us install the knowledge in to our PC(Brain) ? It is still in the "download" folder. Try to make note of it.
Be one among the persons who installed the application (Knowledge) and not the persons who still sleep in the bar itself.
If you find yourself hard to stop, there are certain medications which can help you overcome the craving.
Consult a Psychiatrist. Also open your eyes to the positive effects of abstaining from alcohol. Get associated with AA teams or any de-addiction program. Spend your time profitably.
Do not get struck somewhere on the road, you have miles to go before you sleep.