Coronation Street producer Stuart Blackburn has said that fans of the soap are set to see a new drugs storyline.
He told the Daily Star that Kylie Platt (Paula Lane) will take son Max's medication after he is diagnosed with Attention Deficit Hyperactivity Disorder (ADHD).
Blackburn said: "Over the weeks we see a real change in Max's behaviour and what we are going to learn is that he is suffering from ADHD.
"We have done a lot of research on this and it is going to take us to a point where Max is going to be put on medication."
He added: "Kylie hits a really low point. She is drained and in that moment of madness she takes Max's medication.
"She is utterly ashamed and husband David is disgusted when he finds out. This is, out of all the bad decisions Kylie has made, the worst one ever. It is going to have a devastating effect on her, her health and those around her, and it is going to bring real trouble to the Platt household."