The packet says you shoudl express off a bit of foremilk and keep it in the fridge, then before each feed you "warm a few teaspoonsful to room temperature", add 4 drops of coleif and then feed.
I've tried this and it's massively impractical - you're tied to the house, and dd often spits back a lot of what I try to give her. In the night I've been expressing a tiny bit into a cup and giving her that, but that means the medication isn't living in the fridge and she has to wait before feeding and gets grumpy, hence spitting a lot of it back.
I asked the nurse at the local new mums drop-in who suggested keeping a pack of ready-made formula by the bed for night feeds As far as I could see, not only is that bad in that I'm BFing my daughter, not formula feeding her, according to the instructions a) you have to make up a formula feed with the drops in it half an hour before feeding, which fails the 'on demand' test and b) the way it works is that it de-activates the lactose in the BM, which it won't be able to do if it's working on formula milk instead.
Does anyone have any genius ideas as to how to get this to work? They suggest ways for doing it with bottles of EBM but that again requires the half hour wait before you can use it.