The correct dosage of vitamin K2 to treat abnormal uterine bleeding and amenorrhea is 2.5 to 10 milligrams per day for five to 10 days, according to Drugs.com. The correct dosage to treat constipation is 0.35 milligrams daily.
Treatment of endometriosis requires 5 milligrams per day for two weeks, increased by 2.5 milligrams per day every two weeks until reaching 15 milligrams, explains Drugs.com.
Vitamin K2, or deblitane, is generically known as norethindrone and is used for pregnancy prevention, notes WebMD. Women who cannot take estrogen use it. Although it is more effective than some other forms of birth control, it does not routinely prevent ovulation because it does not contain estrogen or progestin.