Sitting with
      a Muslim who takes drugs
Question

                Is it permissible for a Muslim
      to eat with a Muslim who takes pills and drugs, or is it not permissible
      to eat with him, especially if he is one's neighbour? Is it permissible to
      speak to him or not? What should we do in this situation?
Praise be to Allah.If
      you are able to denounce their evil action and you hope that they will
      respond, then sit with them in order to advise them and tell them not to
      do that evil action, and enjoin what is good, in the hope that Allaah will
      bring about good through you. If they respond, then praise be to Allaah,
      otherwise withdraw from them.