I'm also on a low dose of escitalopram (5mg) and have been on and off for over twenty years for episodes of mild to moderate depression. They have been amazing for me, and I don't feel like I've suffered any adverse effects. However, this summer, I was on holiday and realised I was running low on my supply, so decided to take the opportunity to try and gradually taper off. For context - I've experienced a relatively common side effect in the past, even if I forget to take a dose for a day (or less!) - horrible dizzy 'electric shock' type sensations. Perhaps because I was still taking a tiny dose whilst tapering, this didn't happen, so I thought I was doing well, but about 2 weeks in, I suddenly started feeling awful - hugely anxious, a feeling of detachment/disassociation, low and tearful and awful headache and fatigue.
It was really unpleasant, and I had a lot going on, so I went back up to 5mg, and within a day or two felt back to normal.
I've since done some research online and have read that, particularly when on an AD like this long-term, you need to taper down extremely gradually (so just halving the dose, despite it being so small was still too much for my brain to cope with, by the looks of things).
I also read that many of these ADs including escitalopram are available in liquid form which allows you to taper down much more slowly, and I'm waiting to speak to my GP about this.
Having said all this, a part of me feels like I'm in a good place with no adverse effects (that I'm aware of at any rate) so why rock the boat....