In July 2014, 28-year-old German Lars Mittank had a holiday with a couple of friends at Golden Sands in Bulgaria – a popular destination for young people from Germany and England. When partying on the beach, he gets into a fight with other tourists over football. Lars, being a fan of football club Werder Bremen, has heated argument with supporters of the rival Bayern Munich team. The conflict ends up with a brawl and Lars suffers a small injury in his ear. At the end of his trip, a doctor advises him not to fly, prescribes him an antibiotic called Cefuroxime 500, and refers him to a hospital.
When the holiday is over, he decides to stay in Bulgaria for further treatment. He rents a hotel room in the poor part of the town and convinces his friends they can leave without him. Just a day later, he shows extremely erratic and bizarre behaviour, all caught on CCTV cameras, and vanishes into thin air.
He spent a night at a hotel but got paranoid and scared. He panicked and texted his mom saying he didn't feel safe, that she should cancel his credit card and that he was hiding from four men following him, who asked what the pills (antibiotics) were.
According to the physician, the young man indeed visited the doctor’s office next day, but as soon as he got there, he suddenly jumped up and ran out. The episode was also caught on the surveillance video. After leaving the airport, people saw him climbing over a fence, disappearing into a nearby forest.
Lars’ family says he has no history of mental illness. The reason for his hysteric behaviour could be an undetected head injury from the fight. Or a psychotic break, but it’s unlikely it happened from taking the antibiotics.
Here is a website dedicated to Lars Mittank, including a age-progression photo and additional details about his physical characteristics.