There is not much to go on that I can find online. Maybe someone could help with some web sites for info/other people experiencing this.
Mum, 78, on the suggestion of her friend in New Zealand started to take a supplement for pain relief from arthritis a couple of years ago.
She has since found out it has been banned in Mayasia, where it comes from as it contains several toxic ingredients. It makes sense: mum has a gastric ulcer that is refusing to heal and one of the ingredients, (think it's the chlorphiramine or might be the piroxicam rather than the frusemide) can cause gastric bleeding.
She stopped taking it about 3/4 weeks ago and has been feeling nauseous and sick since, plus is suffering terrible back pain.
Sorry this is soooooo looooong. Standard google search not turning anything up.