Hi, I ve been on my period for the last 3 weeks though its not heavy bleeding and the last time i went to get checked, i was told that my periods are irregular due to the implants im using at the moment. The doctor presicribed Primolut N as a hormone balance drug but its a bit expensive so i opted for Norethisterone as its slightly cheaper. Does it work just as well as Primolut N in stopping the bleeding?