Description of the medicine: Norethisteron (Norethisteronum)
NORETISTERON (Norethisteronum). 17 a-Ethynyl-17 b-oxy-4-estren-3-one, or 17 a-ethynyl-19-nortestosterone.
Synonyms: Norkolut, Ethinyl Nortestosterone, Aethynilnortestosteron, Anovule, Anzolan, Dianor, Fortilut, Gestest, Hormoluton, Micronor, Noralutin, Norcolut, Norethindrone, Norfor, Norgestin, Noridel, Norluten, Norlutol, Norlutol, Norlutol, Norlutol, Norlutol, Norlutol, Norlutol, Norlutol, Norlutol, Norlutol, Norlutol, Norlutol, Norlutol
The structure of norethisterone is close to ethinyl estradiol. It differs from the latter by the presence of a ketone group (instead of hydroxyl) in position C and a double bond in position 4 - 5 of ring A.
Norethisterone is a well-absorbed oral progestogen. The maximum plasma concentration is detected 1 to 2 hours after taking the drug.
Indications for use are basically the same as for other progestogens (see Progesterone, Pregnin), including dysfunctional uterine bleeding, premenstrual syndrome, menstrual cycle disorder, as well as endometriosis, cystic glandular endometrial hyperplasia, etc.
It is usually prescribed orally at a dose of 0.005-0.01 g (5-10 mg) per day (1-2 tablets).
In premenstrual syndrome and menstrual irregularities, 1 to 2 tablets are prescribed per day, starting from the 16th day of the cycle to the 25th day. With dysfunctional uterine bleeding and cystic glandular endometrial hyperplasia, 1 to 2 tablets are prescribed per day for 6 to 12 days. To prevent relapse, they are taken at the same dose in the period from the 16th to the 25th day of the cycle (usually together with an estrogen preparation).
With endometriosis, it is prescribed for a long time (within 6 months) 1 tablet per day from the 5th to the 25th day of the cycle or 1/2 tablet starting from the 5th day of the cycle and gradually increasing the dose by 1/2 tablet every 2 - 3 weeks for 4 to 6 months.
In menopausal syndrome, 1 tablet is prescribed per day (continuously), if necessary, together with an estrogen preparation, for example, ethinyl estradiol at a dose of 0.025-0.05 mg (25-50 μg per day).
In all cases, the doses of norethisterone should be selected individually depending on the nature of the disease, the effectiveness of therapy and tolerability of the drug.
When using, nausea, allergic reactions (skin rash, etc.), paresthesia, increased fatigue, etc. are possible.
Contraindications: see Progesterone.
Release form: tablets on 0,005 g (5 mg).
Storage: in a dry, cool, dark place.