Hi Audiokiwi. I'm a Kiwi too, living in Wellington.
I haven't had that side effect but have read that it can happen.

What does your rheumatologist say - is there any chance of maybe switching to humira?

AS, IBS, reflux oesophagitis and dysphagia, PCOS/insulin resistance, asthma...
Currently managing my AS with humira, methotrexate, low starch diet and exercises. Also taking omeprazole, metformin etc.