Peak body for immunologists changes guidelines as evidence shows up to 90% of those reporting allergy don’t have one

• Get our breaking news email, free app or daily news podcast

The majority of Australians who report a penicillin allergy are not truly allergic, prompting the peak body for immunologists to change its guidelines in a bid to reduce hospital stays and tackle antimicrobial resistance.

Penicillin, one of the most commonly prescribed antibiotics in Australia, was thought to cause allergies in 10% of Australians, or about 2.8 million people.

Study identifies ‘circadian depression’ as affecting nearly a quarter of more than 11,000 participants

• Get our breaking news email, free app or daily news podcast

Australian researchers have identified a new subtype of depression – termed “circadian depression” – linked to disruptions in the body’s internal clock, which they believe is less responsive to traditional antidepressant treatments.

In a study published in British Journal of Psychiatry, involving clinical and genetic data from 11,380 Australians with mostly severe and recurrent depression, researchers identified circadian depression as affecting nearly a quarter (23%) of participants.