Today begins the Novena to St. Maximilian Maria Kolbe. He has been named the patron saint of addicts by reason of his execution by lethal injection on August 14, 1941 at the Nazi concentration camp of Auschwitz in occupied Poland.

Every year on http://sobercatholic.com I post a novena to him; it focuses on alcoholism and addiction.

Please go here for the complete Novena: Novena to St. Maximilian Kolbe for Alcoholics and Addicts. You can bookmark that link and visit it daily. 

Here is another  prayer that you can say, anytime of the year:

St. Maximilian Kolbe, your life of love and labor for souls was sacrificed amid the horrors of a concentration camp and hastened to its end by an injection of a deadly drug.

Look with compassion upon (name of person) who is now entrapped in addiction to drugs or alcohol and whom we now recommend to your powerful intercession. Having offered your own life to preserve that of a family man, we turn to you with trust, confident that you will understand and help.

Obtain for us the grace never to withhold our love and understanding, nor to fail in persevering prayer that the enslaving bonds of addiction may be broken and that full health may be restored to him/her whom we love.

We will never cease to be grateful to God who has helped us and heard your prayer for us. Amen.