Levonorgestrel-containing intrauterine system Mirena refers to the first-line therapy of heavy menstrual bleeding (OMC) according to the recommendations of different countries. The efficacy, acceptability, and quality of life of women using Mirena are similar to those in the surgical treatment of abnormal uterine bleeding, including endometrial ablation and hysterectomy. The clinical case presented in this study of the management of a patient with heavy menstrual bleeding allowed us to demonstrate the effectiveness of the levonorgestrel-containing Mirena intrauterine system in OMC. The patient was observed in the consultative polyclinic of the V. D. Seredavin State Medical University. At the initial treatment, she complained of heavy menstruation, decreased performance, weight gain, and periodic increases in blood pressure. After a comprehensive clinical examination, taking into account heavy menstruation, a decrease in the quality of life, as well as the need for contraception, the introduction of the Mirena IUD was recommended. A year after the introduction of the IUD, the patient had amenorrhea. 5 years after the introduction of the Mirena IUD, the patient developed hot flashes, increased sweating, vaginal dryness, mood swings, sleep disorders, accompanied by an increase in FSH levels. The intrauterine system was removed and a new IUD - Mirena-was installed as a component of menopausal hormone therapy. After 2 months from the beginning of therapy, the complaints were completely stopped, the state of health is satisfactory, dryness in the vagina does not bother. Thus, the use of the LNG – IUD Mirena was effective for the relief of heavy menstrual bleeding, in addition, in women of this age group, it is possible to continue using the levonorgestrel-containing intrauterine system Mirena as a component of menopausal hormone therapy.