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He later returned to the surgery, saying they were not making him feel better and his doctor moved him from sertraline to citalopram, a similar drug.

Mr Kingston returned to the surgery saying they were not making him feel better, and his doctor moved him from sertraline to citalopram, a similar drug.

The most commonly used antidepressants in the UK - citalopram, sertraline and fluoxetine - had the lowest risk of ADS.

The oral antidepressants analyzed were amitriptyline, bupropion, citalopram, desvenlafaxine, doxepin, duloxetine, escitalopram, fluoxetine, mirtazapine, nortriptyline, paroxetine, sertraline, trazodone, and venlafaxine.

For example, citalopram is an antidepressant broken down by a protein called CYP2C19.