I had to make 12.5 mg out of 50 mg capsules, annoying!

You would have to open the capsule, tip the powder out onto a piece of paper and flatten it out into an even shape (square or rectangle shape) and split it into 4 even parts to make 6 mg for each dose.

Then you take one part there and then as your first dose and keep the rest of the powder for later (possibly put it in some container or whatever). Or you ca get hold of some empty gelatine caps from a healthfood shop and make doses that way. If you don't wantto do that, you can also tip the powder back into the capsule you had removed it from. To do that, you just fold a piece of paper and put the powder into the fold and use it as a kind of funnel to slip the powder back into the capsule. Then the next time you need a dose, you tip if out again on paper, split the powder into 3 even parts this time and repeat, until you are left finally with one part to take and keep that for your night time dose. For the day, you will need to open capsules and take the doses that way, but always keep the last part of the powder for the night time, so you won't be waking at night splitting up capsules!

That's how I did it anyway.