It's luredoff course. I guess it means that drugs tempt and attract you - but the way they lead is off course = outside your normal path in life, in the wrong direction.
Probably another way of saying that they lead you astray (if that can be said of things other than humans).
I`m here not exactly to add anything to this thread, but just to say that two years later it has been very useful to me. I was trying to find a logical trasnlation for this expression but now I guess I had not quite understood the real meaning.
Thansk o everybody.