Why is PSL aromasin 20mg cap not 25mg?

[bigtyivier]

Why is PSL aromasin 20mg cap not 25mg? Isnt standard dose 25mg which can be broken in half if someone wants to do 12.5mg eod

 

[polarbear1134]

That's like asking why does phentremine come in 2 different tab mgs and 3 different capsule mgs that can't be broken in half.
Most real meds come in a variety of tab capsule types and a variety of mgs