SustEN SR 300 Tablet is a natural female sex hormone, progesterone . It is used to treat menstrual and pregnancy-related issues that are caused by hormonal imbalance. SustEN SR 300 Tablet is also prescribed, along with estrogen, as a part of hormonal replacement therapy for preventing endometrial hyperplasia (thickening of the lining of the uterus). It should be taken with food. It should be taken at the same time each day to get the most benefit. You should continue taking it for as long as ... GestoFIT 300mg SR Tablet is a natural female sex hormone, progesterone . It is used to treat menstrual and pregnancy-related issues that are caused by hormonal imbalance. GestoFIT 300mg SR Tablet is also prescribed, along with estrogen, as a part of hormonal replacement therapy for preventing endometrial hyperplasia (thickening of the lining of the uterus). It should be taken with food. It should be taken at the same time each day to get the most benefit. You should continue taking it for as ... Susten 200 MG Tablet SR is a medicine that contains natural micronised progesterone , a female hormone. It is used to treat irregular menstruation and prevent uterine cancer. Learn about its uses, side effects, dosage, price, composition, and more. Progesterone (Natural Micronized ) is a type of progesterone hormone which is extracted from plants, but its property matches with the human progesterone . This medicine undergoes a process called micronization where the size of the natural progesterone is reduced. The small size of the progesterone particles enhances its dissolution and absorption. This provides better availability of Progesterone (Natural Micronized ) in the body and decreases its side effects.