Revealed: The risks of a caffeine crash

Nearly one-in-five drivers have admitted to experiencing a caffeine crash while driving, according to new research from car insurance experts MoneySuperMarket. 

As the mercury rises, iced lattes and cold brews become the go-to for many Australians. But a new study from MoneySuperMarket suggests these summer favourites could be a hidden road safety risk. 

A caffeine crash occurs when the stimulating effects of caffeine wear off, causing a sudden drop in energy, mood and focus.  

According to pharmacist Deborah Grayson, caffeine wards off tiredness by blocking the neurotransmitter adenosine that builds up in the brain, making us feel sleepy.  

“After the effects wear off you can feel less alert or focused, but if you feel extreme tiredness, problems concentrating, you’re irritable and you have a headache, that may indicate a caffeine crash,” she said. 

Some iced coffees contain up to 294mg of caffeine – almost three-quarters of the recommended daily limit for adults. And with 41 per cent of drivers admitting they increase their caffeine intake when seasonal drinks hit menus, the risk is real. 

MoneySuperMarket’s car insurance expert Alicia Hempsted said the risk is real. 

 “As caffeine isn’t classified as a controlled or restricted substance, there is no legal limit on how much drivers can consume before they drive,” Hempsted said. 

“However, with some drinks now offering three quarters of an adult’s daily recommended allowance in one drink, drivers should be conscious about how much they consume, especially if they’re heading out on a long journey.” 

Road safety experts recommend taking regular breaks – ideally every two hours – and avoiding late-night journeys between midnight and 6am when alertness naturally dips. Staying hydrated and planning rest stops can make a big difference to your safety.

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