How to divide Caverject (PGE-1 Alprostadil) doses for it to last longer?

So I went the chemical PE route and am using regular injections of Alprostadil PGE-1 to induce 3-4 hr erections about 1-2x a week.

I would do it more frequently if I could get more out of one Aprostadil injection which costs 30 EURos. So it is very, very expensive to do this regularly.

So has anyone managed to some how manually divide the doses?

So one injection I need is about 1/4th. Theoretically 3/4ths are wasted.

How can I manually break bottle and divide the white powder of PGE-1 to get only the dosage I need each time?

Has anyone figured out best method to do this? Theoretically should be possible.

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