Unhappy with insulin switches (Lantus+Novo to Levemir+Fiasp) - advice appreciated!

[DaveB]

There is an interesting three dimensional graph that has been shared a few times showing the duration time of Levemir dependent on something like dose and weight.
For some it can last 24 hours. It does not always need to be taken twice a day for everyone.
Although one of the benefits of it is that it can be.

For interest I split my Levemir 3 ways and use the bedtime last dose to balance what my BS is then to avoid a night-time hypo. My own insulin production is erratic so this approach does work for me.