Nidagen SR 200mg (progesterone) is typically taken once daily, preferably at bedtime to minimize dizziness. Starting on the 15th day of your menstrual cycle, swallow the sustained-release tablet whole with water; do not crush or chew it. In a standard cyclical therapy, you will take this medication for 10 to 12 days (usually from Day 15 to Day 25 or 26 of your cycle), and then stop. A withdrawal bleed (your period) should start a few days after stopping. Because exact schedules depend on your specific condition, please confirm the precise number of days you should take it with your gynecologist.

Please be reassured that taking progesterone from the third to the seventh month of pregnancy is generally safe and highly unlikely to harm your baby. Progesterone is a natural hormone crucial for maintaining pregnancy. It is commonly prescribed during these specific months to prevent preterm labor or miscarriage in at-risk pregnancies. Extensive medical research shows that using progesterone during the second and third trimesters does not cause birth defects or harm the baby's development. It was likely prescribed to protect the pregnancy. I recommend discussing this with your obstetrician during your next prenatal visit for personalized reassurance.