Hi, Kanaaz, Thank you for this. That side effect - muscle weakness - had slipped past my radar. I have sudden muscle weaknesses in my arms and legs. I also have spinal stenosis which could also cause that (and may itself also be a side-effect, of course - fibrin in the spinal column). The problem for me is that I am a violinist. I can still teach but I was doing popular recitals. Now I dare not chance this in case I drop my bow. This has almost happened even when teaching!