@ tp4tissue -
Naturally, hormones are not something to trifle with, since they control and regulate almost everything, but the amounts are small. When I first tried it several years ago, they sold 300 micrograms, 1 milligram, and 3 milligrams.
I have not seen anything smaller than 1 mg in a few years, although I have not searched specialty suppliers. I am sure that there are many options available when you start looking.
At first, when I couldn't get the 300 mikes anymore, I was cutting the 1 mg tabs in half. I stopped doing that, but keep thinking that I should start again. I think that half a milligram is probably enough to do the trick for me. There can be a groggy/hangover effect in the morning, I never take it later than about 10:30 pm.
They also sell mist inhalers which are supposed to be quicker-acting and don't last as long. You might have to look in the children's section for that.
Also, I don't do it every night, only when I feel that I am going to have trouble going to sleep. Sometimes that is a couple of nights a week, sometimes I go a couple of weeks without using it.