Europe — EMA
Norethisterone Remedica
GNH USA supplies Norethisterone Remedica (Norethisterone), a progestogen for menstrual disorders and hormonal contraception.
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What is Norethisterone?
Norethisterone, the active ingredient in Norethisterone Remedica, is a synthetic progestogen presented as an oral tablet for oral administration. It is employed to manage various menstrual disorders and to provide hormonal contraception for women of reproductive age.
GNH USA supplies Norethisterone Remedica as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide, ensuring quality and regulatory compliance across markets.
What is Norethisterone used for?
Norethisterone is a synthetic progestogen used in the management of hormonal and menstrual conditions.
- Menstrual disorders: regulates irregular cycles and reduces heavy bleeding. - Endometriosis: suppresses ectopic endometrial tissue growth and alleviates pain. - Primary dysmenorrhea: decreases menstrual pain by stabilizing the uterine lining. - Secondary amenorrhea: induces withdrawal bleeding in women with absent periods. - Hormonal contraception: prevents ovulation and creates an unfavorable endometrial environment for implantation.
What are the side effects of Norethisterone?
Norethisterone may cause a range of adverse reactions, which are generally classified by frequency and severity.
Common Side Effects: - Nausea or vomiting - Breast tenderness - Headache - Mood changes - Weight gain - Spotting between periods
Serious or Rare Side Effects: - Deep vein thrombosis or pulmonary embolism - Severe allergic reaction (anaphylaxis) - Liver dysfunction (jaundice, elevated enzymes) - Visual disturbances - Severe abdominal pain
What precautions apply to Norethisterone?
Before prescribing Norethisterone, clinicians should evaluate patient history and risk factors.
- Contraindication: pregnancy – the drug is contraindicated in pregnant women. - Cardiovascular risk: avoid in patients with a history of thromboembolic disorders. - Liver disease: use with caution in severe hepatic impairment. - Smoking: advise women over 35 who smoke to avoid use. - Drug interactions: review concomitant medications for potential interactions. - Store at ambient temperature: keep below 25 °C, in the original packaging, protected from moisture and light.
What does Norethisterone interact with?
Norethisterone can interact with several medicines, altering its efficacy or safety profile.
Major Interactions (Avoid): - Anticoagulants (e.g., warfarin): may increase risk of thrombosis. - Strong enzyme inducers (e.g., rifampicin, carbamazepine): may reduce hormonal effectiveness. - Certain antiretrovirals (e.g., efavirenz): may lower plasma levels of norethisterone.
Moderate Interactions (Monitor Closely): - Antifungals (e.g., ketoconazole): may increase plasma concentration. - Antidepressants (SSRIs): may affect bleeding risk. - Herbal supplements (St. John’s wort): may decrease effectiveness.



