According to the Royal College of Psychiatrists (2015), antidepressants are normally used to treat people with moderate to severe depressive illness (but not mild depression).
They may also be used to treat people with a range of other conditions including
Antidepressants are sometimes used to help autistic people with mental health problems (such as depression and anxiety), with the core features of autism (such as restricted and repetitive behaviours and interests) and with other issues (such as challenging behaviours).