Q: I'm currently taking 20 mg daily of Citalopram. A: Regarding Citalopram and its use in the treatment of depression, the normal starting dose is 20 mg daily. It is quite typical for many patients to have their dose of citalopram increased to 40mg.our doctor will likely prescribe a 20 mg dose of citalopram, taken once a day, to start. That dose could be increased gradually to 40 mg a day as you adjust to the medication. It can be taken with or without food.