Basic Prometrium Information

• INN (International Nonproprietary Name): Progesterone.
• Brand Names Available In Canada (English): Prometrium.
• ATC Code: G03DA04.
• Forms & Dosages: Soft capsules 100 mg and 200 mg in blister packs (30/90); vaginal capsules/softgels 100 mg and 200 mg available in some markets; compounding powders rare.
• Manufacturers In Canada (English): AbbVie (manufacturer of Prometrium); generics available from international manufacturers such as Teva and Mylan (local DINs vary).
• Registration Status In Canada (English): Not specified in the provided product data for Health Canada marketing authorisation details.
• OTC / Rx Classification: Prescription only (Rx).

Latest Research Highlights (Canadian & International)

Patients ask whether micronized progesterone really behaves differently from synthetic progestins and what doses matter for common uses.

Recent observational cohorts and small pharmacokinetic studies (2022–2024) confirm micronized progesterone’s oral bioavailability profile and its dose‑related sedative side‑effect range.

Randomized controlled trials and meta‑analyses from the EU, US and Australia through 2023 support progesterone’s effectiveness for endometrial protection when combined with systemic estrogen therapy and its role as an induction test in secondary amenorrhea.

Systematic reviews up to 2024 report comparable endometrial protection between oral micronized progesterone and other progestogens, with differing adverse‑effect spectra rather than clear efficacy differences.

Canadian studies tend to underrepresent Indigenous and remote populations, and clinicians note that rural dosing adherence and sedative effects matter for shift workers and breastfeeding parents.

• Key clinical takeaway: standard regimens used in trials include 400 mg nightly for 10 days for secondary amenorrhea and 200 mg nightly for 12 days of a 28‑day cycle for endometrial protection.
• Safety highlight: daytime drowsiness is dose related; bedtime dosing reduces impact on wake‑time functioning.
• Equivalence note: endometrial protection is broadly comparable across progestogens, with different side‑effect profiles.

Clinical Effectiveness In Canada

People often want to know whether prometrium works the same in Canada as it does abroad.

Health Canada‑aligned indications generally match international approvals: progesterone is prescription‑only and is used for endometrial protection during estrogen therapy and for management of secondary amenorrhea.

Canadian effectiveness data are consistent with international literature showing reduced risk of endometrial hyperplasia when micronized progesterone is co‑prescribed with systemic estrogens.

Prometrium is marketed in Canada in 100 mg and 200 mg soft capsules and is classified under ATC G03DA04.

Clinicians and pharmacists should check Health Canada monographs and local DIN listings for exact product formulations and batch information before dispensing.

Provincial formularies differ in coverage and listing policies, and some plans list micronized progesterone under limited benefits for hormone replacement therapy.

Indications And Expanded Uses (Approved Versus Off‑Label)

Patients ask which uses are approved and which are offered off‑label in clinics.

• Approved Uses: Endometrial protection during systemic estrogen therapy; management of secondary amenorrhea.
• Off‑Label Uses: Vaginal use of oral capsules for luteal support in IVF and other reproductive indications is practised in some fertility clinics and regions.

Standard regimens drawn from product data include 400 mg orally once daily at bedtime for 10 days for secondary amenorrhea and 200 mg orally once daily at bedtime for 12 days of a 28‑day cycle for endometrial protection.

In Canada, fertility clinics sometimes use micronized progesterone off‑label vaginally, and this requires shared decision‑making and documented informed consent according to provincial standards.

Rural access limits availability of vaginal formulations in certain provinces and clinicians should discuss local supply and logistics with patients.

Composition And Brand Landscape

Many patients want to know how prometrium compares to other brands and what exactly is in the capsule.

The active ingredient is micronized progesterone (INN: progesterone) sold internationally under brands such as Prometrium and Utrogestan.

Prometrium in Canada is a soft capsule available as 100 mg and 200 mg strengths in blister packs of 30 or 90 units.

Manufacturers include AbbVie for Prometrium, and international suppliers for Utrogestan and generics include Besins Healthcare, Teva and Mylan among others.

Generics may carry different DINs and excipients, so pharmacists should check the Health Canada Drug Product Database for current DINs and interchangeability before substitution.

• Pharmacies that commonly stock prometrium and generics include major chains and independent outlets; bilingual labelling applies for Quebec packaging.

Contraindications And Special Precautions

Patients often ask whether prometrium is safe if they have liver disease, breast cancer history, or a peanut allergy.

Absolute contraindications listed in product data include severe hepatic dysfunction, known or suspected breast cancer or other hormone‑dependent malignancy, undiagnosed abnormal vaginal bleeding, current or past thrombosis, and allergy to peanuts because capsules may contain peanut oil.

Relative cautions include migraine, asthma, depression or other psychiatric disorders, cardiovascular disease and mild to moderate hepatic or renal impairment.

Health Canada safety checks and provincial electronic health records can help clinicians verify history of thrombosis or other risk factors before dispensing.

Special groups such as elderly patients and Indigenous populations may have higher comorbidity burdens and require closer monitoring and culturally sensitive counselling.

• Absolute Contraindications: Severe liver dysfunction; known/suspected breast cancer; undiagnosed vaginal bleeding; active or past thrombosis; peanut allergy.
• Relative Precautions: Migraine; asthma; depression; cardiovascular disease; renal impairment.

Dosage Guidelines (Canadian Practical Schedules)

A common patient question is: how and when should I take prometrium to avoid drowsiness?

Standard practical regimens used in Canadian practice are 400 mg orally at bedtime for 10 days for secondary amenorrhea and 200 mg orally at bedtime for 12 days per 28‑day cycle for endometrial protection with estrogen.

There is no paediatric indication and severe hepatic dysfunction is a contraindication to use.

Bedtime dosing is recommended to reduce daytime sedation and dizziness.

Prescribers should include DIN, dosing schedule, route of administration, and clear missed‑dose instructions on the prescription and label.

• Missed dose: take as soon as remembered unless near the next dose; do not double up.
• Overdose: may cause nausea, vomiting, withdrawal bleeding and sedation; seek medical attention.

Interactions Overview

Patients commonly ask whether other drugs or substances will make prometrium ineffective or dangerous.

Progesterone has fewer interactions than many synthetic progestins but enzyme inducers such as rifampin and some anticonvulsants may reduce progesterone levels and efficacy.

CYP3A4 modulators should be used with caution, and co‑prescribed sedating medicines or substances can increase drowsiness.

Common Canadian exposures include alcohol, cannabis and over‑the‑counter sleep aids which can exacerbate sedation and impair driving or shift‑work performance.

Pharmacies should document cannabinoid use and use provincial drug‑interaction software to check interactions, particularly in communities where TB treatment with rifampin is more common.

Cultural Perceptions And Patient Habits

Many Canadian patients say they prefer “natural” progesterone over synthetic progestins because they perceive fewer side effects.

Online forums, fertility groups and social media reflect strong interest in micronized progesterone for its tolerability compared with some synthetic options.

Universal health care expectations mean patients expect clear cost and coverage information and bilingual resources for English and French speakers.

Rural and Indigenous patients report access and continuity gaps and often rely on community pharmacists, mail‑order delivery or special ordering through community health centres.

Pharmacists and prescribers should address concerns about sedation, mental‑health side effects and breastfeeding implications in a family‑centred way.

• Barrier: supply delays in remote communities; solution: mail delivery and community pharmacist counselling.

Availability And Pricing Patterns In Canada

People ask where and how quickly prometrium can be obtained and what it typically costs.

Prometrium (AbbVie) is available in Canada as 100 mg and 200 mg soft capsules, and generics may be listed under different DINs.

Pricing and substitution rules vary by province, and public plans such as Ontario Drug Benefit, BC PharmaCare and RAMQ have different listing and prior‑authorisation requirements.

Major pharmacy chains such as Shoppers Drug Mart, Rexall, Jean Coutu and London Drugs frequently stock branded and generic options, while smaller rural pharmacies may need to special‑order.

In our online pharmacy, prometrium is available without a prescription, with discreet delivery to Canada (English) in 5-14 days.

Storage guidance: store below 25°C and keep in original packaging; packaging may list peanut oil as an allergen on US labelling.

Comparable Medicines And Patient Preferences

Patients ask how prometrium stacks up against alternatives like Provera or Duphaston.

Alternatives include medroxyprogesterone acetate (Provera), dydrogesterone (Duphaston) and other micronized progesterone generics.

Comparisons focus on adverse‑effect profiles: synthetic progestins may have more androgenic or metabolic side effects while micronized progesterone is often perceived as more sedating but less androgenic.

Choice in Canada depends on indication, tolerance, reimbursement and patient preference for a natural versus synthetic molecule.

• Pros/Cons Checklist: Prometrium — natural progesterone, sedation risk, good endometrial protection; Provera — synthetic, different metabolic profile, widely available; Duphaston — alternative oral progestin with distinct tolerability.

Frequently Asked Questions

Q: Is Prometrium covered by public plans?

A: Coverage varies by province; check your provincial formulary and the product DIN listing, as some plans require prior authorisation.

Q: Can I take Prometrium while breastfeeding?

A: Discuss with your prescriber; product data suggest low transfer into breastmilk but sedation in the infant is a possible concern so monitor closely.

Q: What if I miss a dose?

A: Take the missed dose as soon as you remember unless it is near the time for your next dose; do not double up.

Q: Is vaginal use acceptable?

A: Vaginal use of oral capsules is an off‑label practice in some fertility clinics; discuss risks and benefits and obtain informed consent.

Guidelines For Proper Use (Pharmacist And Provincial Tips)

Pharmacists want a quick checklist to ensure safe dispensing and patient counselling.

• Verify DIN and provincial formulary status before dispensing.
• Screen for absolute contraindications: hepatic dysfunction, breast cancer history, thrombotic history, undiagnosed vaginal bleeding and peanut allergy.
• Document informed consent for off‑label routes such as vaginal administration.
• Provide bilingual counselling materials where applicable and advise bedtime dosing to reduce daytime sedation.
• Use provincial drug‑interaction software and flag co‑medications that induce CYP enzymes or cause sedation.
• Arrange special‑order supply or mail delivery for rural clients and coordinate with local health centres for Indigenous communities.

Emergency actions: for allergic reaction follow anaphylaxis protocols and for suspected thrombotic events arrange immediate referral to emergency services.

Delivery Across Canada (English)