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Primosiston: what is it for and how to take it

Primosiston is a medication that can be used to stop bleeding from the uterus. It is also widely used to bring forward or delay menstruation and can be purchased from pharmacies on prescription.

This medication contains norethisterone acetate 2 mg and ethinyl estradiol 0.01 mg as active ingredients, which are capable of preventing ovulation and hormone production, thereby modifying the tissue lining the uterus internally and stopping bleeding caused by irregular shedding of the endometrium.

While using Primosiston, vaginal bleeding gradually ceases and within 5 to 7 days it should completely disappear. To stop menstruation, besides using Primosiston, there are other techniques that can be used.

Primosiston: what is it for and how to take it

What is it for

Primosiston is indicated for the treatment of uterine bleeding and to delay or bring forward the day of menstruation as it is able to prevent ovulation and hormone production by modifying the tissue that lines the uterus, called the endometrium, and stopping bleeding caused by your period.

How to take it 

The use of Primosiston is indicated in the following ways:

  • To stop bleeding caused by dysfunctional uterine bleeding:

The recommended dose is 1 pill, 3 times a day for 10 days, which can stop uterine bleeding within 1 to 4 days when it is not associated with any injury to the uterus.

Although variable, bleeding usually subsides within the first few days from the start of treatment, which can last 5 to 7 days until it stops completely. In cases where the woman wishes to stop her long-term menstruation, lasting longer than 8 days, it is important to talk to the gynecologist to identify the cause. 

  • To bring menstruation forward 2 or 3 days:

Take 1 pill, 3 times daily for at least 8 days from the 5th day of your menstrual cycle. The first day of your menstrual cycle is the first day of your period. In this case, menstruation usually occurs 2 to 3 days after discontinuation of the medication.

  • To delay menstruation 2 to 3 days:

Take 1 pill, 3 times a day for 10 to 14 days, taking the 1st pill 3 days before the scheduled date of your next period. In this case, before use, it is very important that you make sure that there is no pregnancy, for safe use, without risking the baby's health.

Possible side effects

Primosiston is generally well tolerated, but sometimes unpleasant symptoms such as headache, nausea, a feeling of breast tension and an upset stomach may occur. Taking more pills than you should, may cause symptoms such as nausea, vomiting and vaginal bleeding.

This medication can also interfere with the action of oral anti-diabetic medication and is therefore not recommended for diabetic women.

Who should not take it

Primosiston should not be used during pregnancy, breastfeeding, allergy to its components, or in cases of breast cancer.

It should be used with caution if there is heart disease, sickle cell anemia, a previous episode of stroke or a heart attack or there are liver abnormalities.

In addition, Primosiston contains hormones but should not be considered a contraceptive and therefore the use of condoms is recommended during all intimate contact.

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