After an ecg showed irregularities in my heart my doctor reduced my regular dose of citalopran down from 40gm to 30gm for 2 weeks - I'm now on 20mg nightly. He believed this drug was causing heart issues. My problem is I can't seem to stop getting upset. I cry easily and am very irritable especially with my partner. (i have been on citalopran for several years). Has anyone else experience low moods when dose is reduced.?