jj
Firstly, Your Lantus (background insulin) is designed to tackle the glucose that the liver dribbles into your bloodstream, If yu've got your dose right (and it's lasting the required time) you would find on a fasting test that your BG from start to finish would remain within-/+ 2mmol/l or perhaps 3 mmol/l on the very out side...
Your stomach cramps/diahorrear is of concern though, as this could be a signal that the bdoy is going into DKA, what were your bg's like leading up and durning this period? So need to treat with caution, you should really have ketone test strips prescribed, so if you experience this you can detect whether you have any ketones in your urine... If you are suffering this and find ketones in your urine, it's time to quickly seek emergency medical aid as the body is DKA..
As it seems you've got through the main bout of this already, it may have been a stomch bug of some sorts, but as it's still rearing it ulgly head, you really need to see your GP to sort this out and find the cause of it..
As it could still be effects of a simi enternace into DKA which they need to pin down and sort for you, or it may well be a signal that you have an interllorance to Gluten (coeilec disease) which can show similar symptons and needs checking out..
Has the insulin gone bad... Have you checked the expirey date, is it near to expiring? Have you had any problems with storage, too hot or too cold? Is it off colour in anyway these are the usual sign that the insulin itsef gone bad.. And also if injected it tends not to work so well, or not at all..
However, Lantus is getting a bit of a repertation surrounding it, with different side effects, from basic stinging at the site of injection, through to some more unpleasent side effects which some seem to kick in after a period of time of using it... CarbRok and Janabell can tell you more concerning this..
It may well be, that a move to another brand of insulin, either to Levirmer (I've used without problems) another background insulin... or perhaps moving to animal insulin might be helpful..
But you do really need to speak to your GP, as yes your problems do need looking into and resolving..