In the letter, she begs the US firm to give her 13-year-old son, who has cystic fibrosis, its new wonder drug Trikafta.
Mum-of-four Tracey, 33, of Johnstone, Renfrewshire, said: “Please don’t let my son die, he has so much more to give.
“Vertex, you are the only people that can give him a chance, to be his heroes and the power to grant him life. Watching your child go through this – while watching other CF sufferers on Trikafta have amazing results – is heartbreaking.
“But Ayden is so strong, he is determined to try to get better and I won’t give up fighting until he does.
“He won’t have long to live, just a few days, if he doesn’t get help very soon.”
Trikafta, dubbed by Vertex as “almost a cure”, can’t be prescribed by UK doctors as it hasn’t been granted an EU licence. The only way sufferers can get it is if Vertex give it under a compassionate-use scheme.
Health Secretary Jeane Freeman said she had contacted Vertex to urge them to consider Ayden for compassionate use.
Meanwhile, Ayden’s friends and loved ones have taken to social media using the hashtag #SAVEAYDEN pleaing with Vertex to give him the much-needed drug.
The group have been tweeting pictures of themselves holding heartbreaking signs, similar to the one Ayden held in his hospital bed and urged others to spread the word.
Amongst them was his uncle, who wrote: Please @vertexpharma give my nephew a chance to breathe. #saveayden #Trikafta