Tardyferon B9

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Medically reviewed

Rosario Oropesa

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 Tardyferon B9

Quick Facts

Property Description
Active ingredient Ferrous Sulfate and Folic Acid
Form Film-coated tablet (modified-release)
Pharmacological class Haemopoietic agent / Anti-anemic agent
General purpose Supports blood formation by correcting dual deficiency
Origin Synthetic micronutrients

Tardyferon B9: Classification and Combination Components

Tardyferon B9 is a pharmaceutical product classified as an anti-anemic agent and haemopoietic agent, explicitly formulated to address the concurrent shortages of two vital micronutrients required for robust blood production. It is distinguished as a fixed-dose combination product, which means it integrates two distinct active components into a single medication, streamlining therapeutic management for specific nutritional deficits. Combinations of ferrous salt and folic acid are recognized for their role in addressing common nutritional deficiencies.

The product is clinically recognized for its use in situations where a combined deficiency is present or anticipated. The dual approach simplifies therapeutic intervention by ensuring the availability of both iron and folate simultaneously.


Composition: Ferrous Sulfate, Folic Acid, and Release Form

The active composition of Tardyferon B9 consists of Ferrous Sulfate (a key source of elemental iron) and Folic Acid (a crucial B-vitamin), both synthetic compounds replicating necessary nutritional elements. The medicine is administered via the oral route as a film-coated tablet.

A key characteristic differentiating this preparation is its modified-release formulation. This specialized system is designed to gradually liberate the active compounds into the gastrointestinal tract. This design serves to support the overall absorption of the ferrous iron and intended gastrointestinal tolerability compared to standard immediate-release iron formulations. The sustained release of iron helps ensure a continuous supply for the body's ongoing needs.


The General Purpose of This Dual-Therapy Agent

The general purpose of Tardyferon B9 is to provide simultaneous support for hemoglobin synthesis and erythropoiesis stimulation. By furnishing the necessary iron and the critical folic acid cofactor, the medicine aids in correcting the underlying nutritional imbalances that lead to a scarcity of red blood cells. This focused action helps to restore the necessary biological resources required for efficient oxygen carriage and healthy cell proliferation.

Regulatory References

  1. WHO Essential Medicines List

What side effects are possible with Tardyferon B9?

Possible side effects and safety information

The safety profile for this combination of ferrous sulfate and folic acid is structured around officially documented adverse reactions, which are largely centered on the gastrointestinal system.

Adverse Reactions Classified by Frequency

Adverse reactions are classified in regulatory documents based on how often they have been reported in clinical experience:

Frequency System-Organ Class Examples of Reactions
Common Gastrointestinal disorders Constipation, abdominal pain, nausea, black stools, diarrhea
Uncommon Gastrointestinal disorders Gastritis, vomiting, indigestion
Uncommon Skin and Immune System Pruritus (itching), erythematous rash, laryngeal oedema
Not Known Immune System disorders Hypersensitivity reactions, urticaria (hives)

Documented Serious Safety Constraints

The official labeling highlights specific serious risks associated with the solid form of ferrous sulfate. Serious events such as oesophageal ulceration and bronchial stenosis/necrosis have been documented, particularly when the tablet is not properly swallowed or is accidentally inhaled. This safety constraint is emphasized for elderly patients and those with swallowing difficulties. Furthermore, a crucial safety warning from regulatory authorities notes that accidental overdose of iron-containing products is the leading cause of fatal poisoning in children under six.

Folic acid also carries a specific constraint: when used alone, it may mask the hematological signs of Vitamin B12 deficiency while the potentially severe neurological effects progress. The medicine is formally contraindicated in individuals with established iron overload conditions like hemochromatosis.

Overdose and Emergency Response

Overdose: When to Seek Help

Official regulatory information emphasizes that an overdose of this medication can be serious, particularly if large amounts are ingested. Overdose is of specific concern in children under 2 years of age.

Immediate medical intervention is crucial for any suspected overdose.

Documented Overdose Manifestations

Symptoms recorded in official labeling generally stem from severe gastrointestinal and circulatory effects:

  • Gastrointestinal: Nausea, vomiting, severe irritation, and necrosis (tissue damage).
  • Circulatory: Shock, which may occur in many cases.

Emergency Response and Management

Prompt treatment of an overdose is vital and must be initiated by medical professionals. The management strategy focuses on reducing the absorption of the drug and addressing the resulting systemic toxicity.

Specific medical interventions may include:

  • Gastric Lavage: Washing out the stomach, often using a sodium bicarbonate solution.
  • Chelating Agents: The administration of a specific antidote, such as deferoxamine, is effective. This agent is especially warranted when serum iron concentrations exceed 4 µg/mL.
  • Supportive Care: Conventional clinical methods are employed to manage complications like shock, dehydration, and imbalances in the body's acid-base balance.

Immediate medical help must be sought if an overdose is suspected, as the condition requires urgent and specialized clinical treatment to counteract the potential for life-threatening complications.

Therapeutic Uses of Tardyferon B9

Tardyferon B9 (ferrous sulfate and folic acid) is a therapeutic combination applied across domains where additional symptomatic support is needed to address specific nutrient deficiencies. Its core therapeutic use is for the preventive treatment of iron and folic acid deficiencies during pregnancy, particularly in scenarios where a sufficient dietary intake may not be ensured.


What Tardyferon B9 treats: main uses and benefits

This medicine is relevant in conditions characterized by periods of heightened symptoms linked to systemic deficiencies, with its principal use being the prevention of iron and folic acid deficiency. The treatment may assist with managing the symptoms related to systemic imbalance that accompany these deficiencies. It is commonly used across conditions presenting with acute episodes of deficiency, offering support that helps maintain a sense of stability when nutritional needs are high.

“This supportive care contributes to easing the overall symptom load for the patient,”

The combination supports general well-being during symptomatic phases by addressing the physiological requirements linked to these deficiencies. This relief is often needed in clinical settings that involve acute or unstable symptom patterns where temporary symptomatic assistance is beneficial.

Quick Fact: Relief for symptoms related to systemic imbalance

Regulatory References

  1. Agence Nationale de Sécurité du Médicament (ANSM) therapeutic overview

Eligibility and Restrictions for Use

Eligibility Profile: Who Can and Cannot Use Tardyferon B9

Tardyferon B9 (ferrous sulfate/folic acid) is a regulated prescription medicine with specific constraints on its use, based strictly on official regulatory labeling. These rules define eligible populations and groups for whom use is strictly prohibited or restricted.

Contraindicated Populations (Must NOT Use) Eligibility Status
Known hypersensitivity (allergy) to any ingredient. Prohibited (Absolute Contraindication)
Confirmed iron overload diseases (e.g., haemochromatosis). Prohibited (Absolute Contraindication)
Untreated Vitamin B12 deficiency (e.g., pernicious anemia). Prohibited (Risk of Masking Condition)
Special Populations & Age Groups Regulatory Rule
Pregnancy Indicated for preventive treatment of iron and folic acid deficiency, typically starting in the second trimester (from the fourth month).
Breastfeeding Use is permitted under normal conditions.
Children (Under 6) High risk of fatal poisoning from accidental ingestion; not typically indicated.
Patients with Swallowing Difficulties Use with caution due to risk of esophageal damage if the tablet is not swallowed whole.

Eligibility-Related Restrictions

Use is also prohibited in patients who are receiving parenteral (injectable) iron therapy. Furthermore, Tardyferon B9 is not intended for use as the primary prevention regimen for congenital neural tube defects, as this requires a specific separate course of high-dose folic acid.

What should I know about interactions with other medicines?

This section summarizes the officially documented interactions for Tardyferon B9, which is a combination of Ferrous Sulfate and Folic Acid, as stated in government regulatory sources.

Contraindicated and Restricted Combinations

Co-administration with injectable iron salts is formally not recommended in regulatory labeling due to the risk of rapid iron release, which may lead to transferrin saturation and potential systemic reactions. Furthermore, Folic Acid is restricted in cases of undiagnosed Vitamin B12 deficiency as it may mask the condition’s hematological signs while allowing neurological progression.

Exposure-Altering Interactions

The iron component reduces the absorption and resulting systemic exposure of several medicines through chelation in the gastrointestinal tract. This applies to oral tetracyclines and quinolone/fluoroquinolone antibiotics, as well as Thyroxine, Levodopa, and Methyldopa.

Interacting Substance Category Officially Documented Effect Timing Restriction
Oral Tetracyclines / Antacids Reduced absorption of either drug. Separation of at least 2 hours is required.
Food / Tea Reduced iron absorption. Simultaneous use with tea must be avoided.

Folic Acid may cause a reduction in the efficacy or plasma levels of anti-folate agents like Methotrexate and Pyrimethamine due to documented pharmacodynamic antagonism. Folic Acid also increases the metabolic clearance of certain antiepileptic drugs, including Phenytoin and Phenobarbital.

Mechanism of Action

Tardyferon B9 acts by providing essential cofactors, ferrous iron and folic acid, to modulate fundamental metabolic and physiological processes focused on hematopoiesis and nucleic acid synthesis.


Regulation of Hematopoiesis and Oxygen Transport

This domain utilizes ferrous iron, which is absorbed and transported via transferrin to targeted tissues, primarily the bone marrow. The iron is incorporated into the porphyrin structure to synthesize heme, a critical prosthetic group within hemoglobin. This mechanistic cascade drives the synthesis of red blood cells (erythropoiesis) and maintains the blood's capacity for systemic oxygen delivery.


DNA and Cellular Proliferation Pathway

This domain involves folic acid (Vitamin B9) entering the folate cycle, where it is converted to tetrahydrofolate (THF). THF functions as a cofactor in the C1 metabolism pathway, engaging mechanisms essential for the de novo synthesis of purine and pyrimidine bases. This pathway is critical for cellular proliferation, particularly in rapidly dividing cells within the hematopoietic system.


Sustained Gastrointestinal Absorption

This is a pharmacokinetic mechanism where specialized excipients regulate the release kinetics of ferrous sulfate in the gastrointestinal tract. This controlled release profile modulates the iron concentration presented to the intestinal mucosa.

Dosage and Administration Information

Official Administration Guidelines

Tardyferon B9 is an oral tablet indicated for use only in pregnant women for the preventive treatment of iron and folic acid deficiency. Adherence to the prescribed regimen is essential for safe and effective use.


Dosing and Timing

Administration Detail Official Instruction
Route of Administration Swallow the tablet whole.
Standard Dose One tablet per day (50 mg elemental iron, 0.350 mg folic acid).
Treatment Period Starting from the 4th month of pregnancy (during the last two trimesters).
Timing Relative to Meals Take with a full glass of water, before or during meals, adjusted according to digestive tolerance.

Procedural Steps and Warnings

  1. Swallow the tablet whole using a full glass of water.
  2. Do not suck, chew, or hold the tablet in your mouth. This instruction is critical due to the risk of mouth ulceration and tooth discoloration.
  3. If a dose is missed, do not take a double dose to compensate.

Always follow the dosage and duration of treatment prescribed by your healthcare provider, as this drug is used under specialized supervision.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Therapeutic Focus and Composition

Clinical research has investigated the use of iron (ferrous sulfate) and folic acid (vitamin B9) supplements for managing iron and folate deficiencies during pregnancy. The rationale for this combination is based on the increased demand for both nutrients during gestation, which may exceed dietary intake.

Efficacy in Deficiency

  • One Phase III trial reported that patient groups receiving the supplement had an increase in hemoglobin and ferritin levels over a 12-week period. These findings focused on the supplement's ability to help restore iron and folate reserves in women with diagnosed deficiency.
  • Meta-analyses and systematic reviews focusing on daily iron and folic acid supplementation (the components of Tardyferon B9) have found that this approach may reduce the incidence of maternal anemia at term when compared to placebo or no supplementation.
  • Additional analysis suggested that daily iron and folate supplementation may be associated with a lower incidence of low birth weight in infants, though the evidence for other infant outcomes, such as preterm birth or neonatal death, is less certain.

Comparative and Safety Observations

Observation Focus Research Finding
Tolerability Gastrointestinal side effects (e.g., nausea, constipation) were frequently reported with oral iron, sometimes leading to discontinuation of treatment.
Dosage/Timing Studies have examined whether intermittent (non-daily) supplementation regimens show similar maternal and infant outcomes to daily regimens, with some research suggesting intermittent dosing may be associated with fewer side effects.
Exclusions Study protocols generally excluded participants with conditions that can affect iron metabolism or contraindicate iron supplementation, such as iron overload (hemochromatosis) or certain severe types of anemia.

Key Studies & References

  1. Ferrous Sulfate Supplementation Causes Significant Gastrointestinal Side-Effects in Adults: A Systematic Review and Meta-Analysis
  2. Label: TULIVITE (iron- as ferrous sulfate, folic acid tablet) - DailyMed - NIH (for general component description and regulatory context)

Frequently Asked Questions (FAQ)

Common questions about Tardyferon B9 (FAQ)


Q: What is the difference between Tardyferon and Tardyferon B9?

According to the official product information, Tardyferon B9 is a combination medicine containing both Ferrous Sulfate (iron) and Folic Acid (Vitamin B9). The drug Tardyferon (without the B9) generally refers to the single-ingredient formulation containing only the iron component. The B9 in the name indicates the inclusion of Folic Acid.


Q: Why is folic acid (B9) included in this iron supplement?

The medicine is officially formulated as a combination to address the concurrent shortages of two vital nutrients: iron and folic acid. This dual approach is intended to provide support for the formation of red blood cells and prevent a dual deficiency in pregnant women.


Q: Can men take Tardyferon B9, or is it only for women?

Official regulatory documentation indicates this medicine is reserved for use only in pregnant women for the preventive treatment of iron and folic acid deficiency. There is no specific labeling or indication for general use in men.


Q: Can Tardyferon B9 be taken with other vitamin supplements?

Official labeling highlights that the Folic Acid component may mask the hematological signs of Vitamin B12 deficiency, and the iron component is known to interact with Calcium products. Patients should be aware of the potential for interactions with other supplements, particularly those containing Calcium.


Q: Does Tardyferon B9 affect the results of blood tests?

The official warning is that the folic acid component may create a masking effect. This means that the blood-related signs of a Vitamin B12 deficiency may be concealed, even while the neurological issues potentially associated with the deficiency may continue to advance.


Q: What is the significance of the 'B9' in the drug name?

The ' B9' in the drug name refers to the inclusion of Folic Acid, which is Vitamin B9. This naming convention reflects the medicine's composition as a fixed combination of iron and Vitamin B9 ( Folic Acid).


Q: How should Tardyferon B9 be stored at home?

Regulatory documents mandate that the medicine should be stored in the original packaging, protected from moisture, and not stored above 30 C (86°F). It must also be stored out of the sight and reach of children.


Q: What are the signs that Tardyferon B9 is actually working?

Studies supporting the medicine's use reported an increase in hemoglobin and ferritin levels over the course of treatment. These blood markers are used by healthcare professionals to monitor if the medicine is helping to restore the body's iron and folate reserves.


Q: Are there delayed side effects that show up after a few weeks of taking Tardyferon B9?

Official safety documentation lists adverse reactions by frequency (e.g., Common, Uncommon), such as nausea, constipation, and stomach pain. However, the regulatory safety profile does not classify these effects based on the timing of onset (immediate versus delayed over weeks).


Q: Does Tardyferon B9 interact with antibiotics?

Regulatory documents state that certain antibiotics, specifically oral tetracyclines and fluoroquinolone/quinolone antibiotics, should be taken at least 2 hours apart from the iron component to prevent reduced absorption.


Q: How does the slow-release formulation of Tardyferon B9 work?

Tardyferon B9 is a modified-release film-coated tablet. This specialized design gradually liberates the active compounds ( Ferrous Sulfate) into the gastrointestinal tract. This controlled-release system is designed to improve the iron's absorption and enhance gastrointestinal tolerability compared to standard immediate-release iron supplements.


Q: Why is Tardyferon B9 often recommended before and during conception?

The medicine is indicated for use during pregnancy, starting from the fourth month. The folic acid component is a critical cofactor for DNA and cell proliferation, which are essential processes in fetal development. However, the medicine is not intended for use as the primary prevention regimen for congenital neural tube defects.


Q: Is Tardyferon B9 the same as just taking iron supplements?

No. Tardyferon B9 is a combination medicine containing Ferrous Sulfate (iron) and Folic Acid ( B9). Standard iron supplements typically contain only the iron component. The B9 is included to provide both nutrients necessary for blood formation.


Q: Are there any foods I should avoid while taking Tardyferon B9?

The official drug information specifically advises that the medicine should not be taken at the same time as tea, as compounds in tea can significantly reduce iron absorption. It is also noted that Calcium products (including supplements) can reduce the absorption of iron.


Q: Is Tardyferon B9 a prescription drug or over-the-counter?

Official labeling emphasizes that this medicine is used under specialized supervision and requires adherence to the dosage and duration prescribed by a healthcare provider. This suggests the medicine is typically categorized as prescription-only or requires professional guidance for its use.


Q: Can Tardyferon B9 be given to teenagers?

The official label indicates the medicine is reserved for pregnant women. It carries a specific and severe warning about the risk of fatal poisoning if ingested accidentally by children under 6 years old. The official labeling does not provide a specific dosing or general indication for use in the general teenage population.


Q: Can people with kidney issues take Tardyferon B9?

Regulatory documents mention that a side effect known as brown-black pigmentation of the gastrointestinal mucosa has been observed in elderly patients who suffer from chronic kidney disease, along with other conditions. Official labeling suggests caution and monitoring when used in this population due to documented observations of pigmentation.


Q: Does Tardyferon B9 contain lactose or gluten?

Based on the official product information, lactose and gluten are not generally listed among the primary active components or excipients.


Q: What should I do if I experience a skin rash while on Tardyferon B9?

Official safety documentation lists skin reactions such as pruritus (itching) and erythematous rash (uncommon), and hypersensitivity reactions (not known). Since these are documented adverse reactions, any sign of rash or allergic reaction should be reported to a healthcare provider.


Q: Why do people recommend taking Tardyferon B9 at night?

The official guidance advises patients to take the tablet before or during meals, adjusted according to individual digestive tolerance. Regulatory labeling does not provide a specific instruction or rationale for taking the dose at night.

How should Tardyferon B9 be stored and disposed of?

Storage and Disposal Requirements

The storage and disposal of Tardyferon B9 (ferrous sulfate/folic acid) must follow specific conditions established in official regulatory documents to maintain product quality and safety.

Requirement Area Official Conditions
Temperature Limit Do not store the medicine above 30 C.
Packaging Protection Store in the original package to ensure protection from moisture.
Child Safety Keep out of the sight and reach of children.
Disposal Rule Unused or expired product must be disposed of according to local requirements.

The official storage profile mandates that the tablets remain protected from both high temperature and moisture. Unused or expired medication should not be disposed of using household waste or wastewater systems, but through proper pharmaceutical waste channels as defined by local regulations.

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

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