(KFF Health News) – “As a geriatrician, it gives me pause,” Han said. “Our brains are more sensitive to psychoactive substances as we age.”

Thirty-nine states and the District of Columbia now allow cannabis use for medical reasons, and in 24 of those states, as well as the district, recreational use is also legal. As older adults’ use climbs, “the benefits are still unclear,” Han said. “But we’re seeing more evidence of potential harms.”

A wave of recent research points to reasons for concern for older users, with cannabis-related emergency room visits and hospitalizations rising, and a Canadian study finding an association between such acute care and subsequent dementia. (Read More)