Kalt,
I don't know where you get your info.
They all can be taken
in non oral form, progestin AND progesterone!!!!!
Natural Progesterone
(progesterone is a more fragile molecule than estrogen, that's why its not in powder form, which
makes it not ideal for sublingual use since the liquid will not stay there

)
- Capsule form (Promethium, Microgest, etc)
- Can be taken orally
(but absorbtion in stomach is not that good (food, etc)
and the progesterone is fragile and can be destroyed by the stomach environment )
- Can be taken as a suppository (its in the leaflet in the box I had)
(good absortion since that area is highly vascular and the environment is much more benign)
- Gel Form, Crinone
- Cream Form (less concentrated than the gel, people just use more)
- The progesterone creams; I believe it can be bought anywhere over the counter in the US.
Provera is a progestin, has some of progesterone's effects but has many other possible side effects.
Provera exists in Depot form. Depot-Provera. Under the skin. Lasts a while. Used for birth control.
Duphaston is the progestin with the best side effect profile.
Duphaston exists in Depot form, proluton depot. Again, non oral.
There is a host of other progestins that used to be used, and some still are in
birth control pills, but they have bad side effect profiles (worse than provera).
They are particularly androgenic.
The reason people like pills rather than sublingual or swallowing a capsule rather
than using it as a suppository is ease. The doctors allow it because what they want
most is compliance in meds taking. The most important thing about a medication, is actually taking it.
There is a greater chance that people will actually take their medication at a specific time a specific
day if its no bother. So, even though pills like estrace can be taken sublingually, its
less bother just swallowing it even if the effects will be slightly more random, same
thing with a suppository; what do you prefer sticking a capsule up your butt or swallowing it!
Well, most people will swallow it, even taking higher oral doses to compensate for the
loss in effectiveness rather than going the other route. Even in pill form, many people
forget to take their meds all the time; its a big problem.