The family of a teenager who died after doctors repeatedly gave her penicillin despite knowing she was allergic to the drug say they felt disrespected and marginalised.

Ayaan Abdiqadir Maxamed, who had cerebral palsy, died after spending more than a month in hospital even though she was only admitted with a chest infection.

The 14-year-old was admitted to Northwick Park hospital in Watford Road, Harrow, in November 2011 because of an allergic reaction to medication prescribed for the infection.

At the hospital she was twice given penicillin - even though doctors knew she had an allergy to the antibiotic.

An inquest held at the North London Coroner’s Court from January 12 to 22 heard she suffered a severe allergic reaction and was then transferred to Great Ormond Street Hospital for immediate treatment.

But once Ayaan was transferred back to Northwick Park, doctors gave her another dose of penicillin at 6pm on December 15 and a second dose at 8am on December 16.

Her condition rapidly deteriorated and she died on December 25, 2011.

Senior coroner Andrew Walker concluded Ayaan’s death was contributed to by neglect, and gave causes of death as septicaemia shock, bacterial infection, Stevens Johnsons syndrome caused by penicillin reaction, and quadriplegic cerebral palsy.

Ayaan's mother Mariama Ismail Hassan said she had asked for a translator at the hospital and for all decisions about her daughter’s care to be made by her - but doctors held crucial meetings without her and refused to listen.

She added: “I felt disrespected and marginalised by the hospital. My concerns were not heard - I was completely ignored by the doctors.

“I am still trying to deal with what happened to my daughter. They need to realise the detriment this has caused to the family – it has been very difficult for us all.”

Older sister Kadija Ahmed added: “We were not informed of the decision to administer penicillin and our concerns were not heeded subsequent to reactions.

"My mother did not want to discuss my sister’s care in the absence of her children or a translator for fear of misunderstanding.

"Doctors are not immune to error and must consider the input of family and loved ones."

The family – who live near the hospital - say they hope no one else has to go through the same ordeal, and urge anyone who finds themselves in hospital to make sure they understand what treatment they are being given and to keep asking questions if they feel unsure of something.

Asha Ahmed, Ayaan’s sister, added: “You can’t ask enough questions – it’s so important to make sure you understand what’s going on and make sure you speak up.”

The youngest of six brothers and sisters, her family described Ayaan as a very happy, loving child.

Kadija said: “She was such a happy sister, but she was also quite vulnerable and sensitive as she had special needs. We all doted on her like every family would, because she was the youngest of us.”

Brother Ahmed Abdillahi Ahmed added: “She was the spitting image of our mum, they looked so alike.”

A spokesman for London North West Healthcare NHS Trust said: “We have apologised to the family for this tragic case. A thorough investigation was carried out and the trust now has an action plan in place to implement the lessons learned during the process.”