Grant Denyer collapses on the set of The Amazing Race Australia: 'Can we get the medic? He's shaking'

Grant Denyer's wife Chezzi provides alarming health update: 'This has really knocked me'

Grant Denyer admits to taking opioids while presenting Sunrise 'just so he could stand up' and breaks down in tears as he praises wife Chezzi for staying with him through his addiction

Grant Denyer is seen 'shaking and shivering' as he collapses on the set of The Amazing Race Australia: Celebrity Edition