I have a friend whose OB tested her progesterone, and prescribed 200mg
Prometrium for a level of 8. This increased to 18, so he prescribed an additional 100mg. Her level subsequently rose to >60, at which point she became extremely symptomatic (i.e. nausea, etc.) He decreased her dosage back to 200mg, and her level fell back down to 39. This seems to conflict w/ my doctor's theory that raising the dosage above 200mg will not increase your levels.