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NORETHIN-ETH ESTRA-FERROUS FUM: Uses, Dosage & Safety Information

NORETHIN-ETH ESTRA-FERROUS FUM

NORETHIN-ETH ESTRA-FERROUS FUM

NORETHIN-ETH ESTRA-FERROUS FUM

Norethindrone acetate + Ethinyl estradiol + Ferrous fumarate
Norethindrone with ethinyl estradiol and ferrous fumarate is a family of combined oral contraceptives in which 21 hormone tablets are followed by seven iron-containing tablets that the labelling designates as placebos. The iron offsets menstrual loss and plays no part in contraception. Products differ in strength and cycle design, from monophasic to triphasic and chewable, and all carry the class boxed warning on smoking and serious cardiovascular events.
  • ActiveIngredient: Norethindrone acetate + Ethinyl estradiol + Ferrous fumarate
  • DosageForm: Oral tablet
  • Dosage: Norethindrone acetate 1 mg / ethinyl estradiol 0.02 mg; 1.5 mg / 0.03 mg (with ferrous fumarate 75 mg)
  • Indications: Prevention of pregnancy in females of reproductive potential
  • Manufacturer: Multiple manufacturers under several brand names
  • Storage: Store as directed on the pack; keep well out of reach of children because of the iron content
  • Drug Status: Prescription Only
Drug Status: Prescription Only
Description
The iron is in the placebo tablets, and the label says so
In these products the seven non-hormonal tablets contain ferrous fumarate. The prescribing information describes them as placebo tablets.
The iron is not treating anything and is not part of the contraception. It occupies the week that would otherwise hold inert tablets, and its purpose is to replace a little of what menstruation removes.1

Norethindrone with ethinyl estradiol and ferrous fumarate is a family of combined oral contraceptives sold under many names, in which 21 hormone tablets are followed by seven iron-containing tablets.1 It is listed under birth control and women’s health on iMedix.

The progestin here is not the one used in the more common pills. Norethindrone is a first-generation progestin with a shorter half-life than levonorgestrel, which is why these products are less forgiving of a late tablet — see the levonorgestrel and ethinyl estradiol page for that comparison.

Individual products differ by strength and by cycle design: monophasic Junel Fe, Blisovi Fe and Microgestin Fe; triphasic Tri-Legest Fe and Estrostep Fe; and the chewable Wymzya Fe.

General Instructions

Same time every day, including the iron tablets. Timing discipline matters more with this progestin than with levonorgestrel.

Do not treat the iron as a supplement you can rely on. If anaemia has been diagnosed, that needs separate treatment.

Check which product you have been given. Six named products in this family carry four different strength patterns, and substitution between them is not automatic.

The class rules still apply — the smoking contraindication after 35, the missed-tablet instructions and the enzyme-inducing interactions are set out on the combined contraceptive class page.1

Side Effects
Reported Side Effects
SystemEffectNote for this family
CardiovascularVenous thromboembolism, stroke, myocardial infarctionThe class risk; the basis of the boxed warning
GynaecologicalBreakthrough bleedingOften the first sign of a late tablet with this progestin
GastrointestinalNausea; occasional constipation or dark stoolsThe latter two come from the iron tablets rather than the hormones
CardiovascularRaised blood pressureUncontrolled hypertension is a contraindication
Nervous systemHeadache, migraineMigraine with aura is a contraindication
GeneralBreast tenderness, mood changeCommonly reported across the class

Source: 1

Emergency – stop and seek care
  • Pain, swelling or redness in one calf, or sudden breathlessness or chest pain
  • Sudden weakness or numbness on one side, or difficulty speaking
  • Sudden loss of vision, or a new visual aura before a headache
  • Yellowing of the skin or eyes
Uses

One indication across the family.1

  • Prevention of pregnancy in females of reproductive potential

What the iron is for, and what it is not

Ferrous fumarate in the final seven tablets is a modest supplement offsetting menstrual iron loss. It is not a treatment for iron deficiency anaemia, and someone diagnosed with that needs proper iron therapy rather than a contraceptive with iron in the placebo week.

Nor does it make the pill work better. Contraceptive effect comes entirely from the 21 hormone tablets. A version without iron and a version with it are equally effective.

Why norethindrone rather than levonorgestrel

Both are progestins and both prevent pregnancy. Norethindrone products dominate certain niches — the chewable formulation and the triphasic ascending regimens, which carry a second approved indication that the monophasic products do not. Choice within the class is usually driven by those features and by what a prescriber knows a patient has tolerated, rather than by a claimed advantage of one progestin over the other.

Safety Advice

Interactions Alcohol:

Safe if prescribed
No alcohol restriction applies. Vomiting after heavy drinking is the practical concern, since a tablet lost within a few hours may not have been absorbed.

Interactions Other Medications:

Unsafe
Enzyme inducers such as rifampicin, carbamazepine, phenytoin and St John’s wort cause contraceptive failure with no warning sign. Separately, the iron tablets reduce absorption of levothyroxine and of tetracycline and quinolone antibiotics, an effect that appears only during the final week of each pack.

Special Groups Pregnancy:

Unsafe
This class prevents pregnancy and has no use during one. If pregnancy occurs the tablets are stopped.

Special Groups Breastfeeding:

Consult your doctor
Estrogen can reduce milk supply, particularly in the early weeks. Progestin-only options are usually preferred while breastfeeding is being established.

Special Groups Elderly:

Unsafe
A contraceptive for reproductive-age women. Over 35 the smoking contraindication applies and cardiovascular risk factors accumulate.

Special Groups Children:

Safe if prescribed
Prescribed to adolescents after menarche where contraception is needed. Note separately that iron-containing packs are a serious poisoning hazard for young children in the household and must be kept out of reach.

Effects on Activities Driving:

Safe if prescribed
Not sedating. Headache and nausea are reported but rarely prevent driving. A new visual aura is a reason to stop the tablets and seek review.

Effects on Activities Operating Machinery:

Safe if prescribed
The same applies; no established impairment from this class.
Concerns

These products are prescription-only and supplied by several manufacturers under at least six brand names in four strength patterns.2

The concern with this family is the letters Fe. They read as an upgrade — a contraceptive that also handles iron — and the prescribing information is blunter than the branding: those tablets are placebos that happen to contain iron. Someone anaemic who assumes the pill is treating it will stay anaemic, and someone choosing between an Fe product and its iron-free twin is choosing between identical contraceptives.

The second concern is the family’s size. Six names covering four strength patterns invites the assumption that any of them substitutes for any other. Two of them are triphasic, one is chewable at a different strength again, and only the monophasic pairs are genuinely interchangeable.

Warnings

Smoking after 35

The boxed warning states that cigarette smoking increases the risk of serious cardiovascular events from combined oral contraceptive use, that the risk rises with age and with the number of cigarettes, and that these products are contraindicated in women over 35 who smoke.

Existing clotting risk

Contraindicated with deep vein thrombosis or pulmonary embolism now or in the past, inherited or acquired hypercoagulopathies, cerebrovascular disease, coronary artery disease, and thrombogenic valvular or rhythm disorders of the heart.

Iron in the pack is a poisoning risk for children

This is specific to iron-containing contraceptives and is easily overlooked. Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under six. A pack of these tablets is not the same household hazard as a pack without iron, and it belongs out of reach accordingly.

Timing with this progestin

Norethindrone clears faster than levonorgestrel, and the first sign of a late tablet is usually breakthrough bleeding. That is a prompt to tighten timing rather than to stop the method.

Source: 1

Dosage
The Family at a Glance
ProductDesignNorethindroneEthinyl estradiol
Junel Fe, Blisovi Fe, Microgestin Fe 1/20Monophasic1 mg0.02 mg
Junel Fe, Blisovi Fe, Microgestin Fe 1.5/30Monophasic1.5 mg0.03 mg
Wymzya FeMonophasic, chewable0.4 mg0.035 mg
Tri-Legest Fe, Estrostep FeTriphasic, ascending estrogen1 mg throughout0.02, 0.03, 0.035 mg
All of the aboveFinal 7 tabletsnonenone — ferrous fumarate instead

Source: 21

Take the iron tablets anyway
They carry no hormone, so skipping one has no contraceptive consequence. Taking them keeps the daily habit unbroken, and that habit is what prevents the next pack from starting late.
▶Clinical detailstechnical detail

Norethindrone and levonorgestrel differ in a way that matters for missed tablets. Levonorgestrel is active as given and cleared slowly; norethindrone is cleared faster and a portion of it is converted to ethinyl estradiol in the body, which is why its products carry lower nominal estrogen doses than their effective exposure suggests.

The practical consequence is timing tolerance. A pill whose progestin clears faster leaves a narrower margin when a dose runs late, and the effect shows up first as breakthrough bleeding rather than as loss of protection. That is one reason norethindrone products are often described as needing stricter timing, and it is a better reason to take them at a fixed hour than any general advice about routine.1

Interactions

Hormone interactions are those of the whole combined contraceptive class and are tabulated on the class page. What this table adds is the iron component, which interacts with things the hormones do not.1

Interactions Specific to an Iron-Containing Pack
SubstanceWhat happensSeverityPractical answer
LevothyroxineIron binds it in the gut and reduces absorptionModerateSeparate the doses by several hours
Tetracycline and quinolone antibioticsIron chelates them, lowering antibiotic levelsModerateSpace the doses apart during the course
Rifampicin, carbamazepine, phenytoin, St John’s wortAccelerate hormone clearance; contraceptive failure without warningMajorA different method is usually needed
Smoking over 35Serious cardiovascular eventsContraindicatedContraindicated outright

Source: 1

The first two rows apply only during the seven iron tablets, which makes them easy to miss: an interaction that appears for one week in four looks like coincidence rather than pattern.

FAQs
Ferrous fumarate — iron. It is in the seven non-hormonal tablets at the end of each pack, which the prescribing information calls placebo tablets. The iron plays no part in preventing pregnancy.
No. It is a small supplement intended to offset routine menstrual iron loss, not a treatment. Diagnosed iron deficiency anaemia needs proper iron therapy prescribed for that purpose.
Not as a contraceptive. The hormone tablets are identical and the effectiveness is the same. The iron is a minor addition to the placebo week, nothing more.
They contain no hormone, so missing one has no contraceptive effect. Taking them keeps the daily routine unbroken, which is what stops the next pack from starting late — the riskiest kind of missed dose.
It carries one hazard a hormone-only pack does not: iron. Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under six, so these packs need keeping well out of reach.
Only between products with matching strengths and the same cycle design. This family includes monophasic pills at two strengths, a chewable at a third, and two triphasic products — those are not interchangeable, and a switch should be a prescribing decision.
Evidence and Reported Data

Evidence scope

What we know
  • The labelling designates the seven ferrous fumarate tablets as placebo tablets.
  • Four strength patterns exist across the family, including one chewable and two triphasic products.
  • The contraindications and boxed warning are identical to those of every other combined oral contraceptive.
What remains uncertain
  • Whether the iron in the placebo week produces any measurable benefit is not established by the labelling.
  • Whether norethindrone and levonorgestrel differ in thrombotic risk is not settled.
  • Reporting is dispersed across brand names, so no single count describes the family.

Source: 12

What has been reported to the FDA

As of the FAERS data cut of 30 July 2026, the FDA Adverse Event Reporting System held 20 reports filed under the generic name norethindrone and ethinyl estradiol and ferrous fumarate, of which 4 were classed as serious. Reporting for these products goes almost entirely to the individual brand names instead.3

Why no table appears here

Twenty reports with counts of two and three cannot form a table that means anything. Building one would give the appearance of a pattern where there is only noise.

Counts are frozen at the 30 July 2026 cut and were retrieved on 6 September 2026. The individual product pages carry their own figures, and those are where the reporting for this family actually sits.

Who was this medicine studied in?

Women of reproductive potential electing oral contraception. Most products in this family are generics approved on bioequivalence rather than on new contraceptive trials.2

Who this is and is not appropriate for

Contraindicated in women over 35 who smoke, and in anyone with current or previous venous or arterial thrombotic disease, thrombophilia, cerebrovascular or coronary artery disease, or thrombogenic cardiac valve or rhythm disorders.1

Suitable for someone wanting a combined pill who can keep to consistent timing. The iron is not a reason to choose it and not a reason to avoid it — except in a household with young children, where an iron-containing pack deserves more care than a plain one.

Where to go next

References

References — verified Sep 6, 2026

  1. Lupin Pharmaceuticals, Inc. WYMZYA Fe (norethindrone and ethinyl estradiol tablets USP, chewable, and ferrous fumarate tablets) — prescribing information, cited as a current representative label for this family. DailyMed SPL set ID 4f824b11-14f3-4a92-a516-562b3a434df0, version 15, effective November 19, 2025. dailymed.nlm.nih.gov. Accessed September 6, 2026.
  2. US Food and Drug Administration. Drugs@FDA records for norethindrone, ethinyl estradiol and ferrous fumarate products, covering application numbers, sponsors, strengths and cycle designs across the family. Accessed September 6, 2026.
  3. US Food and Drug Administration. FDA Adverse Event Reporting System, queried through openFDA for the generic product name. Data cut 2026-07-30 · Accessed 2026-09-06.

Three sources are listed because three are cited, covering FDA-approved labelling, FDA regulatory records and FDA post-marketing data.