Ovestin (Estriol)

Estriol, the active ingredient in Ovestin, is an estrogen hormone presented as a 0.5 mg/1 tablet for oral use. It treats menopausal symptoms and estrogen deficiency in women.

GNH USA supplies Ovestin as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals and pharmacies worldwide.

Ovestin is an estrogen preparation that acts on the hormonal pathways involved in menopause and related conditions. - Menopausal vasomotor symptoms: Reduces frequency and severity of hot flashes. - Genitourinary syndrome of menopause: Improves vaginal dryness and discomfort. - Osteopenia prevention: Contributes to maintenance of bone mineral density. - Hypo‑estrogenic states caused by ovarian failure: Restores systemic estrogen activity.

Side effects associated with estrogen therapy vary in frequency and severity.

Common Side Effects: - Nausea: Mild, transient gastrointestinal upset. - Breast tenderness: Localized discomfort or swelling. - Headache: Tension‑type or mild migraine‑like pain. - Fluid retention: Mild peripheral edema. - Mood changes: Irritability or mild depressive symptoms.

Serious or Rare Side Effects: - Venous thromboembolism: Deep‑vein thrombosis or pulmonary embolism. - Stroke: Ischemic or hemorrhagic cerebrovascular event. - Endometrial hyperplasia: Abnormal thickening of the uterine lining. - Hepatotoxicity: Elevated liver enzymes or hepatic dysfunction. - Carcinoma risk: Potential increase in breast or endometrial cancer incidence.

When prescribing Ovestin, clinicians should evaluate individual risk factors and monitor therapy closely. - Cardiovascular risk assessment: Review history of thromboembolic events, hypertension, or smoking. - Cancer surveillance: Monitor for signs of breast, uterine or ovarian malignancy. - Liver function monitoring: Check baseline and periodic liver enzymes. - Bone health evaluation: Assess bone mineral density in long‑term users. - Drug‑interaction review: Verify concomitant medications that affect estrogen metabolism. - Store at ambient temperature: Keep below 25 °C, in the original container, protected from moisture and light.

Estradiol may interact with several drug classes, altering its efficacy or safety profile.

Major Interactions (Avoid): - Combined oral contraceptives: Increases risk of thromboembolic events. - Anticoagulants (warfarin, DOACs): May potentiate anticoagulant effect and bleeding. - Hepatotoxic drugs (isoniazid, ketoconazole): Heighten risk of liver injury.

Moderate Interactions (Monitor Closely): - Antidepressants (SSRIs, SNRIs): May reduce estradiol metabolism, raising plasma levels. - Antiepileptics (phenytoin, carbamazepine): May increase estradiol clearance, lowering efficacy. - Herbal supplements (St. John’s wort): May induce hepatic enzymes and decrease estradiol exposure.