I'm convinced that I get bad batches of Novorapid. I've asked my Doctor/Nurse and they say it doesn't happen. After several months of flat BG (4-8), I've had BG rise to 12-16 and higher using my novorapid and it might have just been water. . I used a phial from a different box / batch and 20 units brought my BG from 18 to 8 in 30 mins which is what I expect. It dipped down to 3 later so I had to eat bread and take glucose to bring my bed time to around 6 where I like it to avoid a night time hypo. . This has happened a few times before. . Has anyone else had this happen? Is there a better way to counteract it? The insulin looks normal and clear, and hasn't been exposed to extremes of temperature.