Coronation Street star John Thomson has revealed a life-changing health diagnosis as he opened up for the first time on the terrifying side effects he dealt with whilst on medication. John revealed his ADHD diagnosis on the podcast, I’m ADHD ! No You’re Not, hosted by comedian Paul Whitehouse and his wife Dr Mine Conkbayir, who specialises in neuroscience. Speaking out on the moment he realised he had ADHD , the Cold Feet star said he was speaking to actress Siobhan Finneran before she turned