Day 13 of Prozac for OCD

Hi everyone,

Looking for a little bit of reassurance. I struggle with OCD and it has worsened over the past 2 years. Mainly for intrusive thoughts and checking behaviours. I also have periods of depersonalisation/derealisation.

I don’t really suffer from low mood, more just OCD causing my mood to be low when it is at its peak

I started in 20mg fluoxetine almost 2 weeks ago and the first week felt great, the thoughts were still there but the rumination did decrease. However, as week 2 has hit i have felt an increase in side effects.

- less rumination but more frequency in intrusive thoughts, new ones i haven’t had before. However the grip they have on me passes much quicker than previously and they aren’t overly dark in nature

- uptick in checking behaviours, scared to throw of medicine packets etc so i can count i have taken them correctly

- so tired and overall more lethargic, i have to nap for up to 3 hours a day at times

- blurred vision, its hard to focus

- brain fog

- feeling generally more “spacey” and light headed and a bit disconnected

I just want to know if anyone else has experienced similar? I am really hopeful this is a peak of side effects and i should see and feel some relief in the coming weeks.

Is it normal to feel better then worse then better again while the SSRIs take hold?

Thanks!

Posted May 13, 2026, 6:33 PM UTC

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