US doctors are highlighting the dangers of legalising marijuana-based products after a toddler was left in a coma after eating nine of her dad’s ‘edibles’.

The previously healthy two-year-old was airlifted to hospital for sedation and decreased responsiveness about 45 minutes after consuming nine gummies containing tetrahydrocannabinol (THC).

She was minimally responsive to stimuli — Glasgow Coma Score (GCS) of 3 — and had a heart rate of 136 bpm.

Her father explained he had purchased the THC edibles at a local petrol station and left the unopened packet on a desk in his house, reported the doctors from the University of Kentucky.