I'm on 25 units of Lantus per day. Started 3 months ago with 15 units, then 20, then 22, then leveling out at 25. I started taking my Lantus at 10PM and it's slowly worked itself down to 7PM over the months. I accredit that to anticipation and the desire to "get it over with" so I can watch primetime television without it looming over my head.
If I take my injection at 7PM and it lasts less than 24 hours then it's not doing its job after my lunch and dinner. How does one test to see if their basil insulin lasts 24 hours?