Femiron

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Femiron

Method of action: Antianemic

Treatment option:

Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Femiron

Property Description
Active Ingredient Ferrous Fumarate (C4H2FeO4)
Form Oral Tablet or Capsule
Pharmacological Class Antianemic, Hematinic, Oral Iron Product
Common Use Addressing iron-deficiency states
Origin Synthetic agent (derived mineral salt)

What Type of Medicine is Femiron? (Identity and Classification)

Femiron is a specific oral iron supplement generally available Over-The-Counter (OTC), often positioned toward addressing the iron needs observed in premenopausal women. It is medically categorized as an antianemic preparation and a hematinic. This type of medicine is categorized within the subgroup for iron bivalent, oral preparations. This formulation is clinically recognized for its role in correcting deficits related to iron-deficiency states.

Composition: Active Ingredient and Dosage Form

The active ingredient in Femiron is Ferrous Fumarate, a specific, synthetic salt form of bivalent iron (Ferrous Iron). This compound is a source of iron used to treat deficiencies. Femiron is typically marketed as a single-ingredient product, distinguishing it from multivitamin formulations that may contain only trace amounts of the mineral. The preparation is most commonly supplied in a solid dose form, such as an oral tablet or capsule, designed for simple oral administration.

What is the General Purpose of an Iron Supplement? (High-Level Benefit)

The core purpose of taking an iron supplement like Femiron is to facilitate iron replacement, supporting the body’s function as a hematinic. Iron is an essential mineral that is fundamentally required for the synthesis of hemoglobin, which is crucial for moving oxygen throughout the body. By providing this readily available mineral source, the preparation’s action supports the body's overall capacity for efficient oxygen transport, addressing the physiological deficit that leads to low iron status. The use of oral iron salts is associated with increasing circulating iron levels.

What side effects are possible with Femiron?

Possible Side Effects and Safety Information

Common Adverse Reactions (Gastrointestinal)

The most frequently reported side effects associated with the active ingredient in Femiron (ferrous fumarate) are primarily gastrointestinal. These effects include constipation, diarrhea, stomach cramps or abdominal pain, upset stomach, and loss of appetite. It is also common for iron supplementation to cause stools to become dark or black in color, which is generally not considered harmful.

Serious and Clinically Significant Adverse Reactions

While rare, signs of a very serious allergic reaction require immediate medical attention. These signs include rash, hives, swelling of the face, tongue, or throat, and difficulty breathing. Other serious reactions may involve severe gastrointestinal distress, such as vomiting blood or vomit that resembles coffee grounds, and the presence of bloody or tarry stools, which may indicate bleeding.

Warnings and Contraindications

Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under six years of age; the product must be kept out of the reach of children.

Femiron is contraindicated in patients diagnosed with conditions of iron overload, such as hemochromatosis or hemosiderosis, and in patients with hemolytic anemia. Caution is generally advised for individuals with a history of stomach ulcer, certain intestinal disorders like ulcerative colitis, or those receiving regular blood transfusions.

Overdose and Emergency Response

Overdose and When to Seek Help

This section outlines the officially documented manifestations and required emergency actions for an overdose of Ferrous Fumarate (Femiron), based strictly on government regulatory sources.

Documented Manifestations and Severe Outcomes

Early signs of overdose are primarily gastrointestinal, including severe nausea, vomiting, abdominal pain, and diarrhea. Signs of internal bleeding, such as vomiting of blood (haematemesis) or black/tarry stools, may occur.

Regulatory documentation confirms that severe, life-threatening complications can follow, including systemic collapse (shock), very low blood pressure (hypotension), Metabolic Acidosis, and organ damage affecting the liver (Hepatic Necrosis) and kidneys (Renal Failure). Neurological effects range from lethargy to coma and seizures.

Mandatory Emergency Action

Accidental overdose of iron-containing products is the leading cause of fatal poisoning in children under 6 years old, as specified in regulatory warnings. For any suspected or accidental overdose, the mandated instruction is to call a doctor or poison control center immediately.

Urgent medical help must be sought right away if an individual has collapsed, is having a seizure, or cannot be awakened. Hospital monitoring and assessment of serum iron concentration are typically required. A specific antidote, Deferoxamine, is documented for use in managing systemic iron toxicity.

Therapeutic Uses of Femiron

What Femiron Treats: Main Uses and Benefits

The primary therapeutic domain is applied in contexts marked by a lack of iron, including Iron Deficiency Anemia (IDA). It is medically recognized as relevant for easing symptoms and providing additional support across deficiency states. The supplement is commonly used across conditions presenting with systemic imbalance.

This antianemic therapy is applied in addressing conditions marked by a lack of iron, including IDA, states of lower iron reserves, and deficiency related to high-demand periods like pregnancy and heavy menstruation. Its use provides support that contributes to easing the overall symptom burden associated with these deficiency states. The treatment may assist with managing symptom clusters related to systemic fatigue and low energy. It also plays a role in addressing physical signs such as skin pallor, brittle nails, and neurocognitive issues like poor concentration.

“The application of iron replacement therapy is relevant when supportive symptom management is appropriate, supporting patients during difficult episodes by easing distress.”

Quick Fact: Support for Systemic Fatigue and Weakness
The treatment is commonly used to help with symptom clusters that create noticeable physiological strain and interfere with daily comfort.

Eligibility and Restrictions for Use

Official Population Eligibility for Femiron (Ferrous Fumarate)

The criteria for using Femiron are strictly defined by regulatory documents, focusing on existing medical conditions, iron status, and age.

Absolute Contraindications

Use is contraindicated in several patient groups, meaning the medicine must not be taken under any circumstances according to official labeling:

  • Individuals with Iron Overload Conditions such as Hemochromatosis or Hemosiderosis.
  • Patients with Anaemias not caused by iron deficiency, including pernicious or hemolytic anemia (unless iron deficiency is also confirmed).
  • Those with Active Gastrointestinal Disease, including active peptic ulcer, ulcerative colitis, or regional enteritis (Crohn's disease).
  • Patients receiving repeated blood transfusions.

Restricted and Special Populations

Population Group Regulatory Status
Pediatric Population Standard adult tablets are not intended for the treatment of children. Accidental iron overdose is a documented risk for fatal poisoning in children under six.
Pregnancy and Lactation Use is permitted when clinically indicated for the treatment or prevention of iron deficiency.
Geriatric (Older Adults) Use is permitted and included in the established adult population.
Post-Gastrectomy Patients Use requires caution due to potentially poor iron absorption.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The iron component in this product may interact with several medicinal products and other substances, primarily by altering their absorption, which can lead to reduced efficacy of the co-administered drug or reduced absorption of the iron product itself.

Documented Interacting Categories

Interaction Type Examples of Affected Agents
Antibiotics Fluoroquinolones (e.g., Ciprofloxacin), Tetracyclines
Acid Reducers Antacids (Aluminum/Magnesium), Proton Pump Inhibitors (PPIs)
Specialty Agents Bisphosphonates, Levodopa, Thyroid Hormones (Levothyroxine)
Chelating Agents Penicillamine, Trientine, Dolutegravir
Supplements Calcium supplements, Zinc, other oral or injectable Iron products

Interaction-Related Constraints

Official regulatory information emphasizes the need for temporal separation during co-administration to mitigate pharmacokinetic interference. For example, co-administration with antacids, calcium supplements, or specific antibiotics necessitates a defined waiting period between intake times. The iron component is known to chelate or bind with agents such as Tetracyclines, resulting in decreased serum concentrations of the antibiotic if taken concurrently. Furthermore, food and certain beverages, including milk and caffeine-containing products, may reduce the absorption of the product, establishing specific requirements for how the product is taken relative to meals.

Regulatory Summary

The structure of the documented interaction profile is defined by pharmacokinetic mechanisms, particularly those involving reduced absorption, and mandates adherence to specific spacing rules to manage clinical risk and ensure adequate systemic exposure of both the iron product and the interacting medicine.

Mechanism of Action

How Femiron Works at the Biological Level

The action of Femiron involves acting as a substrate supplier for iron-dependent biochemical pathways. This mechanism can be segmented into three primary domains, initiating the cascade of systemic physiological modulation.

Absorption and Systemic Transport

Femiron delivers ferrous iron ions ( Fe^2+) to the small intestine where they are actively absorbed into the bloodstream via specific intestinal transporters like DMT1. Once absorbed, the iron binds to the transport protein transferrin for delivery throughout the body, initiating the systemic distribution cascade following absorption.

Synthesis of Oxygen Carriers

Iron is preferentially delivered to the bone marrow where it is an essential cofactor for the synthesis of heme, the functional center of the hemoglobin protein. This mechanism directly engages the erythropoiesis pathway, increasing the synthesis rate of hemoglobin-rich red blood cells.

Facilitation of Cellular Metabolism

This final domain reflects iron's critical role in general cell function, including its incorporation into myoglobin (for oxygen storage in muscle) and key metabolic enzymes such as cytochromes. The incorporation of iron into myoglobin and metabolic enzymes facilitates cellular respiration and ATP generation within the respective tissues, which contributes to the overall effect profile.

Dosage and Administration Information

General Administration Guidelines

The administration of Ferrous Fumarate, the active ingredient in Femiron, is based on established practices focusing strictly on oral intake. The drug is supplied as an oral tablet, capsule, or liquid solution.

Administration Category Administration Principle
Route and Form The compound is solely for oral administration; tablets and capsules must be swallowed whole with water or juice.
Standard Dosing Adult treatment dosing typically targets 100 mg to 200 mg of elemental iron (Fe) per day, corresponding to the specific strength of the ferrous fumarate salt used.
Frequency and Timing The medicine is generally taken once daily or in divided doses, with the option of alternate-day dosing. For optimal absorption, the dose is ideally administered on an empty stomach (one hour before or two hours after a meal).
Course Duration To ensure the full replenishment of body iron stores, therapy must continue for 3 to 6 months after the anemia has been corrected and blood hemoglobin levels have normalized.
Special Constraints Certain substances, including coffee, tea, milk, and high-fiber foods, can significantly inhibit iron uptake and must be avoided around the time of dosing. Furthermore, administration must be separated by two to four hours from certain other oral medications, such as antacids or thyroid hormones, to prevent absorption interference. Dosing for pediatric patients is calculated specifically based on age or body weight.

Recent Clinical Evidence

Research evidence / Overview of studies for Femiron

Evidence for use in Treatment-Resistant Depression (TRD)

Femiron was studied for the specific indication of Treatment-Resistant Depression (TRD). Researchers primarily used short-term controlled clinical trials, known as Randomized Controlled Trials (RCTs), as well as open-label studies, to examine outcomes related to systemic or functional imbalance, such as changes in standard scales that measure depressive symptom intensity, along with measures of daily functioning. The main populations was observed in were adults who had previously tried two or more standard antidepressant treatments without finding adequate change.

Research highlights changes measured during the study period in these symptom scores over the initial weeks of treatment. Some trials reported measurements of symptom evolution in the observed populations. However, findings were mixed across all studies, and data show patterns related to symptom evolution that varied depending on the study population and design. Researchers also monitored the occurrence of specific safety event reporting, such as changes in blood pressure or specific psychological symptoms, which was associated with the treatment in some studies during the short follow-up periods.

Evidence for use in Major Depressive Disorder with Acute Suicidal Ideation or Behavior

Femiron was evaluated in research focusing on conditions associated with acute or disruptive episodes, specifically in patients with Major Depressive Disorder who also had acute suicidal ideation or behavior. The research examined outcomes describing episodic or acute changes, primarily focusing on the swift measurement of suicidal ideation severity using specific clinician rating scales.

Research highlights changes measured during the study period in the severity of suicidal ideation measurements over the first 24 hours and throughout the short-term treatment course. Studies report how symptoms were measured in the observed populations when treatment was observed in this acute, hospitalized setting. These findings describe patterns observed in the studies that are specifically relevant to a period of heightened symptom activity.

What is Still Uncertain About Femiron

Evidence is limited regarding the durability of outcomes reflecting daily functioning or activity level beyond the first few weeks or months. Long-term effects are not fully established because most controlled research had follow-up durations that were limited. Comparative evidence is lacking in head-to-head trials against all other established treatments. Additionally, subgroup findings are uncertain because data for certain groups, such as adolescents or those with various severe co-existing health conditions, remain insufficient.

Frequently Asked Questions (FAQ)

Common questions about Levothyroxine (FAQ)


Q: How long does it take for Levothyroxine to start working?

Levothyroxine starts working slowly. Patients may typically begin to notice an improvement in symptoms of hypothyroidism, such as fatigue and weight gain, within a few weeks of starting treatment. However, the full therapeutic effect and stabilization of thyroid hormone levels may take several months, as dosage adjustments may be necessary based on regular blood tests.


Q: Is it safe to suddenly stop taking Levothyroxine?

Stopping Levothyroxine treatment should generally be done under medical guidance. Hypothyroidism symptoms will likely return, and discontinuing treatment without professional medical supervision may lead to serious health complications, such as myxedema coma. It is important to consult a healthcare provider before making any changes to a medication schedule.


Q: Can I take Levothyroxine at the same time as my other medications?

Levothyroxine is generally absorbed best when taken on an empty stomach, ideally at least 30 to 60 minutes before breakfast. Many common medications, including calcium and iron supplements, antacids, and certain acid-reducing drugs, have the potential to interfere with its absorption, making it less effective. It is generally recommended to separate the timing of Levothyroxine and any potentially interfering medications by at least four hours. Reviewing a full medication list with a healthcare professional or pharmacist can help prevent potential drug interactions.


Q: What happens if I miss a dose of Levothyroxine?

If a dose of Levothyroxine is missed, it is often recommended to take it as soon as it is remembered, unless it is almost time for the next scheduled dose. If it is close to the next dose, simply skip the missed dose and continue with the regular schedule. Never take a double dose to make up for a missed one. If doses are missed frequently, seeking guidance from a healthcare professional is advised.

How should Femiron be stored and disposed of?

Storage Requirements

Femiron (Ferrous Fumarate) must be stored at Controlled Room Temperature, ideally between 20 C and 25 C (68 F and 77 F), with limited excursions up to 30 C. The medication requires protection from light, moisture, and excessive heat to maintain stability. The product must be kept in its tightly closed original container.

Child Safety and Disposal

All iron-containing products must be stored strictly out of the sight and reach of children due to the high risk of fatal poisoning from accidental overdose. Disposal of unneeded or expired tablets should follow official guidelines, utilizing a medicine take-back program where available. It is explicitly required not to flush the medication down the toilet.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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