Safe and Sound Protocol Side Effects vs ANS Processing – Reframing our perspective
During discovery calls, I am often asked about adverse Safe and Sound Protocol side effects. I sometimes hear from clients who have been through the process before with another provider, and who “suffered”, or about people who have scared themselves by reports of side effects from online forums and blog posts.
I would like to explain a little bit about what it all means, and why understanding the impact of the Safe and Sound Protocol is extremely important.
Safe and Sound Protocol side effects

When we work with the SSP, we need to work with an individual’s nervous system. This means watching very carefully for signs that the autonomic nervous system is processing. NOT for “signs of dysregulation”, which is a term that people tend to over-use in an SSP context, in my opinion. If we notice “dysregulation”, we’ve gone way too quickly for the nervous system to keep up with.
Look at the Safe and Sound Protocol as marathon training: could you run a marathon in 2 hours in 3 months time? Most people couldn’t. Most people would need to train for months (or years), and would complete in at least 5-6 hours. If most people tried to rush into running a marathon in a couple of weeks and with minimal training, they’d more than likely need to receive medical attention.
Safe and Sound Protocol “Side Effects”
Early on in my experience as an SSP provider, probably about a year in, I decided to do a self-experiment and deliberately over-listen to SSP to see what would happen. I listened to the whole five hours in a weekend! The result was incredibly interesting and has given me a profound understanding of how the Safe and Sound Protocol works. The result of 2.5 hours of listening per day – in which I deliberately ignored cues of panic, mobilisation and collapse – was that I experienced severe vertigo, severe jet lag-like fatigue, an inability to organise my thoughts or move forward (like wading through glue), and heavily disrupted sleep interspersed with nightmares.
My discomfort continued for about 2 days, and then settled and gradually disappeared. However, I did not benefit at all from that particular round of SSP, whereas I’d always experienced beautiful shifts in the past from working at the speed of my nervous system. By this, I mean I always responded to my autonomic cues, and titrated the SSP accordingly. This doesn’t mean “x minutes per day” – it means yesterday I listened to 10 minutes but then found I couldn’t get to sleep… so today, I’m going to take a break and let my system settle. Tomorrow, I may listem, or I may not, depending on whether my system tells me it’s safe to continue listening or not.
Whenever I’ve done another round of the Safe and Sound Protocol since, I’ve noticed signs that my nervous system needs to settle more easily. I’ve experienced misophonia and tinnitus temporarily too on occasion, but both settle within a few days – although I do have the knowledge to be able to help my body process using somatic techniques, so this is something I am able to help my clients with if any processing becomes uncomfortable after listening.
Another “side effect” I’ve experienced more recently is a sore neck and shoulder, which suddenly appeared half way through a Zoom session with a client.
My neck and shoulder pain started after I snowboarded down a sand dune in North East Brazil back in 2003, and fell off at high speed! However, whenever I’ve been stressed or overloaded, my shoulder pain has always re-emerged. Normally, it takes ibuprofen and a couple of visits to an osteopath to sort it out. However, this time, I suddenly had the reaslisation that I was half way through hour 2 of the SSP and that while I am completely un-stressed at the moment, my body was trying to tell me to keep myself safe.
As soon as I’d realised this was the case and acknowledged it, the pain started to dissipate, and the following day, I woke up and it was no longer there. I found this enlightening, and similar effects have been reported by several clients in the past.
I ask my clients to watch out for a number of very obvious signs of autonomic shifts. The rule of thumb is to put anything out of the ordinary down to the Safe and Sound Protocol rather than assuming SSP has nothing to do with it.
Open communication with a provider is of paramount importance. Agreeing how you’ll work together and how you’ll communicate is key, as well as keeping in close contact throughout the process. Do NOT go AWOL and seethe silently about side effects – you have engaged your provider to keep you safe and they have a duty of care toward you!
The bottom line is not to fear this processing. It needs to happen, but it needs to happen safely and with understanding and connection.







