We’re not meant to put alcohol into our bodies. It’s like putting diesel into a petrol engine. And our poor bodies have to work crazy hard to cleanse the neurotoxin out. Traditional thinking says that a hangover lasts one day, but after a big session, it actually lasts for three days. ‘If you have a binge, you are essentially creating a mini period of dependence, so you have a mini withdrawal after it. So, yes, 72 hours is the likely period of withdrawal,’ says addiction psychiatrist Dr Julia Lewis.