Ovestin (Estriol)
Ovestin is the brand of estriol vaginal cream and pessaries used for postmenopausal urogenital atrophy. It is widely used in Europe and Latin America (not available in the US) and is one of the most commonly prescribed local estrogens for vaginal dryness, dyspareunia and recurrent UTIs.
- Active ingredients
- Estriol
- Manufacturer
- Aspen / Organon
- Dosage forms
- cream, ovule, tablet
- Available dosages
- 0.1%, 0.5mg, 1mg, 2mg
- Category
- Hormones and Birth Control
What is it?
Ovestin is the brand name under which Aspen Pharmacare (originally Organon, then MSD) markets estriol topical and oral formulations globally — primarily in Europe, Latin America, Asia and South Africa. It is the most prescribed brand of vaginal estriol in those markets. Ovestin is not available in the United States, where vaginal estradiol products (Estrace cream, Vagifem tablets, Estring ring) are used instead. Authorised generic estriol cream and ovules are widely available in markets where licensed.
Active ingredients
Ovestin formulations contain estriol — the weakest of the three natural human estrogens. Ovestin Cream contains 0.1% estriol (1mg/g); Ovestin Ovules contain 0.5mg estriol per ovule; Ovestin oral tablets are available in 1mg and 2mg strengths in some markets. The active substance is bioidentical estriol, identical between branded Ovestin and authorised generic estriol products.
Forms and dosages
Ovestin is supplied as 0.1% vaginal cream (with applicator), 0.5mg vaginal ovules (pessaries), and 1mg/2mg oral tablets in some markets. For urogenital atrophy, the typical induction is 1 applicator (0.5mg) of cream daily for 2–3 weeks, then maintenance 1–2 times weekly. Ovules are used similarly. Oral estriol is uncommon because absorption is variable. Cream is applied at bedtime to reduce leakage.
Indications
Ovestin vaginal preparations are approved for treatment and prevention of urogenital atrophy and recurrent urinary tract infections in postmenopausal women, and in some markets for vaginal preparation before pelvic surgery. According to current menopause guidelines in Europe, vaginal estriol is one of two preferred local estrogen options (alongside vaginal estradiol) for women whose primary complaint is vaginal dryness, dyspareunia or recurrent UTIs without significant systemic menopausal symptoms.
How it works
Estriol in Ovestin binds estrogen receptors with shorter receptor occupancy than estradiol, producing a 'weak' estrogenic effect. In the vagina, this is sufficient to reverse urogenital atrophy — restoring vaginal mucosa, normalising pH, reducing dryness and dyspareunia, and reducing recurrent UTI risk — without producing significant systemic estrogenic effects at typical maintenance doses. The mucosa becomes less absorptive as it thickens, further limiting systemic exposure over time.
Frequently asked questions
Do I need progesterone with Ovestin vaginal cream? ▾
At typical low-dose maintenance regimens, Ovestin vaginal estriol does not require concomitant progestogen even in women with an intact uterus, because endometrial absorption is minimal. According to the prescribing information, this differs from systemic HRT (oral or transdermal estrogen) where progestogen is required for endometrial protection. Higher-dose induction regimens may warrant individual assessment.
How is Ovestin different from Estrace cream? ▾
Both are vaginal estrogen creams used for urogenital atrophy, but Ovestin contains estriol (weaker, shorter receptor occupancy) while Estrace contains estradiol (more potent). Both are effective and safe at maintenance doses. According to current menopause guidelines, the choice depends on regional availability: Ovestin (estriol) dominates in Europe and Latin America; Estrace (estradiol) dominates in the United States.
How long can Ovestin cream be used? ▾
Ovestin can be used long-term for as long as benefit is required, with annual review by the prescriber. Symptom relief continues only while treatment continues; stopping leads to gradual return of atrophy. According to current menopause guidelines, no fixed maximum duration applies — the safety profile remains favourable for indefinite use at maintenance doses, which is one of estriol's advantages over systemic HRT.
Can Ovestin cream be used by women with breast cancer history? ▾
Vaginal estrogen therapy in breast cancer survivors is debated but increasingly considered acceptable for severe symptoms unresponsive to non-hormonal options. Vaginal estriol's weak systemic effect makes it potentially preferable to vaginal estradiol in this setting. According to current oncology guidelines, the decision is individual and made jointly with the oncologist, particularly for women on aromatase inhibitors.
Is Ovestin the same as generic estriol? ▾
Yes — Ovestin and authorised generic estriol cream and ovules contain the same active ingredient at the same strengths and have demonstrated bioequivalence. The generic is significantly cheaper and clinically equivalent in nearly all cases. Most current prescribing in European and Latin American markets is on the authorised generic; the Ovestin brand remains the most recognisable name.
Related medications
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.