Have been on Citalopram for 5 months now and before I went on them I was having constant tension headaches now I never get them and all the anxiety has gone but for the past week they have been back with a vengance even though i'm not stressed about anything and can't get rid of them which then makes all the anxiety come back thinking it's something more serious. Has anybody else suffered with tension headaches whilst on Citalopram? These tablets have worked so well past 5 months which is why i'm scared it's something serious. Sorry if this sounds pathetic and stupid but nobody else would understand if i spoke to them about it.