Thank you all for your replies. To clarify mattes I use 4mm Lantus pens which are the only insulin I can use as a vegetarian. I have body wide pain in all my muscles and joints, and weakness in most of my muscles. This has especially affected my breathing as my right llug has ceased operation, and my left lung is mostly not working. I cannot open a packet of crisps as I am not strong enough, and to use the pen is a huge struggle as well as very painful. I am on very serious pain killers like morphine which keeps the pain to almost a bearable level if I do nothing, but something ike injecting myself is getting increasingly unpleasant and difficult.