My partner used to take 1 20mg citalopram daily,but 4 days age she took 10 at once and denied to go to hospital,has she damaged her brain permanently?

NVIC: The National Poisons Information Center in the Netherlands is open to medical professionals only, so your friend should visit a physician as soon as possible. Overdosing on an SSRI can cause a prolongation of the QT interval and lead to polymorphic ventricular tachycardia (Torsade des Pointes) and seizures. You can still possibly save your friend's life if you bring her to a physician. Good luck.