Coronation Street star Helen Flanagan says she was sent into a psychosis after suffering a “bad reaction” to her ADHD medication earlier this year.

The 33-year-old TV star, who’s best known for her role as Rosie Webster in Coronation Street, shared the news on Instagram, after a couple of months away from social media.

She said she was left “emotionally struggling” after splitting from the father of her children, footballer Scott Sinclair – with whom she shares Matilda, seven,…