'Standing frighteningly close to the edge of a 1,500ft high cliff, Yael Borger gazed down into the abyss.
Aged just 16 at the time, and on a youth trip to Israel, a frighteningly powerful force had lured her to the very tip of Mount Masada, facing the sheer drop that falls away into the Dead Sea.
Every thought had melted away apart from one chilling word: Jump.
Recalling the awful moment in 2017, Yael admits: 'I went right to the edge.
'I knew exactly what would come of it if I did jump. But I felt that I wanted to do it anyway.
'In the end I forced myself to sit down to stop myself.'
This was the start of a string of suicidal thoughts that has seen the A-level student consumed by a devastating mental health battle.
Just a year earlier Yael, from Edgware, North London, was put on the powerful and commonly prescribed asthma drug montelukast after being diagnosed with asthma and hayfever.
At first, all was well. The highly effective drug, taken as a tablet, brought her worsening symptoms under control.
But within a year, signs started to emerge that her mental health was deteriorating – and today, she and her family are convinced it is the drug that was responsible.
'I suddenly started having crazy thoughts. I kept being seized by this inexplicable urge to kill myself,' she admits.
Yael's mother Le'at, 41, a graphic designer, said: 'My husband and I noticed Yael becoming more anxious. She developed a fear of meeting people, of speaking to people, and didn't want to go to school.
'She was a normal, bright, bubbly girl and had never shown any signs of mental health problems before.'
Deeply concerned, Le'at began researching all her daughter's asthma medication, which also included a Seretide steroid inhaler, Mometasone steroid nasal spray and Ventolin inhaler.'
Read more: Why did health chiefs clear the asthma drug that can make children suicidal? MoS investigation reveals yet more evidence of pill's sinister side-effects
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