My dad stopped sleeping when he was put onto Citalopram. I cannot recall his previous medication, sorry. He doesn't take any other medication in conjunction with it.
(At one point last year he was taking separate medication to lower his cholesterol which interfered with his anti-depressants and negated their effect. Another thread another time I guess.)
Anyway, When he went back to express his concerns, the doctor doubled his dose of Citalopram and he is now sleeping again. I do not know if the non-sleeping was 'medical' (as in directly chemically connected to his tablets) or a result of his increased anxiety becasue of the Citalopram not having the same effect as his previous medication. This is all within the last seven days and relevant to Emmilou's first question, hence why I'm posting on a matter here I actually have very little experience with

.