Hypersensitivity to citalopram or to any of the excipients.
Citalopram is contraindicated in patients with known QT interval prolongation or congenital long QT syndrome.
MAOIs (monoamine oxidase inhibitors): Cases of serious and sometimes fatal reactions have been reported in patients receiving an SSRI in combination with a monoamine oxidase inhibitor (MAOI), including the selective MAO-B inhibitor selegiline and the reversible MAOI (RIMA) moclobemide, and in patients who have recently discontinued an SSRI and have been started on a MAOI.
Some cases presented with features resembling serotonin syndrome.
Citalopram must not be used in combination with a MAOI, including selegiline, in doses above 10 mg daily.
Treatment with citalopram may be instituted 14 days after discontinuation of non-selective MAOIs and minimum one day after discontinuation of moclobemide. Treatment with MAOIs may be introduced 7 days after discontinuation of citalopram (see Interactions).