The biocenosis of the vagina is determined by a number of factors, in particular, by the concentration of female sex hormones. The combination of progesterone and estriol in low doses with the vaginal route of administration has a moderate trophic effect on the vaginal epithelium, promoting the accumulation of glycogen in it. The accumulation of glycogen contributes to the formation of an optimal acidic environment of the vagina (pH 3.8 -4.2),which provides optimal conditions for the life of the Dodderlein wand, which in turn prevents colonization of the vagina by pathogenic bacteria.
The composition of the drug as one of the active substances is estriol in excess of a small dose of 0.2 mg. Estriol is an estrogen synthesized in the human body. Getting into the bloodstream, it forms a complex with specific receptors (in the uterus, vagina, urethra, breast, liver, hypothalamus, pituitary), stimulates the synthesis of DNA and proteins. Has a selective effect, mainly on the cervix, vagina, vulva, increases the proliferation of the epithelium of the vagina and cervix, stimulates its blood supply, promotes the recovery of the epithelium during its atrophic changes during the periods of premenopause and menopause, normalizes the pH of the vaginal environment, the microflora of the vagina, increases its resistance epithelium to infectious and inflammatory processes, affects the quality and quantity of cervical mucus.
The composition of the drug as the next active substance is progesterone in a small dose of 2.0 mg. Progesterone is a hormone of the yellow body. By binding to receptors on the surface of the cells of target organs, it penetrates into the nucleus, where, by activating DNA, it stimulates the synthesis of RNA. After preparing the epithelium with estriol, progesterone as part of the preparation TRIOJINAL promotes the formation of intermediate layers of epithelium and the synthesis of glycogen - a substrate necessary for the adoption of Dodderlein's wand. Local saturation with hormones ensures the colonization of the vagina with live Doderlein sticks - the third active component of the drug Lactobacillus casei rhamnosus Doderleini, belonging to a strain that is known for its resistance to a number of antimicrobial agents. This creates a similar to the physiological environment in the vagina.