I started taking 20mg of Citalopram again last Thursday and feel really anxious today. I've taken it a few times before in the past, as well as other SSRIs, and thought I knew what to expect in terms of side effects, but have never felt like this before.

My heart's been racing all day, i'm shaky and I feel really jittery and on edge. Ive not done anything stressful or strenuous at all, but i feel more anxious than i ever do normally. Is it normal to experience different side effects from SSRIs each time you take them?

I'm worrying that something's wrong, but know my worry could be just down to the anxiety. I'd normally do some exercise to make me less stressed, but am too scared to do any at the moment as my heart rate feels so high. Obviously I'll make a doctors appointment if it continues, but just wanted to know if its normal and I'm overreacting. Thanks.