Fisiofer

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Fisiofer

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Fisiofer

Property Description
Active ingredient Ferrous Succinate
Form Oral Solution (Liquid formulation, Syrup)
Pharmacological class Anti-anemic agent (Hematinic)
Common use Restoration of iron levels in the body
Origin Synthetic (Pharmaceutical iron salt)

Fisiofer: Classification and Identity as a Hematinic Agent

Fisiofer is a synthetic pharmaceutical preparation classified as an Anti-anemic agent, or Hematinic, designed to supplement the body's essential iron stores. It is used for its role in the prevention and treatment of conditions caused by iron deficiency. The active ingredient is the synthetic compound Ferrous Succinate, which places it within the high-level class of Iron Bivalent, Oral Preparations. Fisiofer is a single-ingredient product administered via the oral route, often positioned for its comparatively high tolerability among oral iron preparations.

Composition and Dosage Form: The Ferrous Succinate Oral Solution

The composition of Fisiofer is centered on Ferrous Succinate, which is a specific salt of the essential micronutrient iron, where the metal is present in its divalent state (Fe^2+). This component is designed for absorption via the gastrointestinal tract. Fisiofer is commonly presented as an oral solution or syrup, a liquid formulation using an aqueous vehicle. The advantage of this solution form is its specialized suitability for various target audience groups, including the pediatric population and adults who may experience difficulty swallowing solid medications, allowing for flexible administration.

General Purpose: Restoring Essential Iron Levels

The primary general purpose of Fisiofer is to counteract states of iron deficiency by facilitating the efficient delivery and absorption of iron into the systemic circulation. Iron is necessary for the production of hemoglobin, which is critical for forming the oxygen-carrying protein within red blood cells, thus supporting erythropoiesis. A typical, neutral use scenario involves replenishing iron levels that may become depleted, supporting the body's capacity for efficient oxygen transport throughout all tissues and organs.

What side effects are possible with Fisiofer?

Possible Side Effects and Safety Information

Fisiofer, as an oral iron supplement, is associated with a safety profile primarily dominated by common gastrointestinal disorders and a mandatory regulatory warning regarding accidental ingestion.

Adverse Reactions by System-Organ Class

The most frequently reported adverse reactions fall within the gastrointestinal system, often correlating with the dose of elemental iron administered.

Classification Common Adverse Reactions (Affecting 1 in 10 to 1 in 100 people)
Gastrointestinal Nausea, vomiting, diarrhea, constipation, abdominal discomfort, abdominal pain, dark or black discoloration of stools.
Other Metallic taste, heartburn.

Stool Discoloration: The darkening of stools to a black or greenish-black color is a frequent, expected, and non-serious consequence of oral iron therapy.

Serious Safety Considerations

Accidental Overdose: A Boxed Warning is typically included for all iron-containing products, stating that accidental overdose is a leading cause of fatal poisoning in children under 6. This requires strict storage vigilance. Overdose symptoms are severe, involving profound gastrointestinal distress, cardiovascular collapse, and potential multi-organ failure.

Contraindications and Restrictions: Fisiofer is contraindicated in patients with known hypersensitivity to the product components, as well as those with conditions characterized by iron overload, such as hemochromatosis or hemolytic anemia, due to the risk of exacerbating iron toxicity. Caution is also advised in patients with existing gastrointestinal diseases, such as inflammatory bowel disease or peptic ulcers, as iron preparations can potentially exacerbate these conditions. Use in pregnancy and lactation is permitted only after risk assessment by a healthcare provider.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory information emphasizes that an overdose of an oral iron salt, such as Fisiofer (Ferrous Succinate), is a life-threatening medical emergency requiring immediate action. Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under six years old.

Documented Manifestations and Severe Outcomes

Overdose manifestations progress through a documented toxicity syndrome. Initial symptoms often involve severe nausea, repeated vomiting, abdominal pain, and diarrhea, which may contain blood. As systemic toxicity develops, regulator-listed findings include lethargy, drowsiness, hypotension (low blood pressure), shock, and the potential for seizures or coma.

Severe outcomes documented in official labeling include profound metabolic acidosis and damage to major organs, such as liver failure (hepatic necrosis) and renal failure.

Official Emergency Actions

Seek emergency medical attention or call a doctor or Poison Control Center immediately for any suspected overdose or accidental ingestion, even if the person appears well. Urgent medical services are required if the individual has collapsed, experienced a seizure, or cannot be awakened. Management procedures described in regulatory guidance include the immediate supportive treatment of shock and the use of the specific antidote, Deferoxamine, to remove systemic iron.

Therapeutic Uses of Fisiofer

Fisiofer contains Iron(III) Hydroxide Polymaltose Complex, which is considered relevant for the symptomatic support associated with iron deficiency and related anemia. This preparation plays a role in managing the symptoms related to systemic imbalance.

The compound is utilized for the symptomatic management of latent and manifest deficiency symptoms.

Relief from Symptom Burden in Acute Contexts

This preparation may be part of symptomatic management in clinical settings that involve acute or disruptive symptom patterns, and is relevant in contexts marked by increased discomfort where short-term symptomatic assistance is needed. It helps address symptoms that interfere with daily functioning and supports general well-being.

“The symptomatic support offered may help patients cope more steadily with symptom fluctuations and assists with maintaining functional stability during demanding periods.”

Easing Functional Strain in High-Need Contexts

The therapeutic domains of use are relevant for easing symptom clusters that create noticeable physiological strain, such as symptoms related to physical discomfort and symptoms that interfere with daily functioning. Fisiofer provides supportive relief when symptoms interfere with routine activities.

Quick Fact: Relief for Functional Strain

Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Fisiofer

Fisiofer is authorized for use in individuals with a confirmed diagnosis of iron deficiency or iron-deficiency anaemia. The official eligibility profile is strictly defined by governmental regulatory documents, establishing absolute exclusions and usage limitations.

Contraindications (Absolute Exclusion)

Use is prohibited for patients with syndromes of iron overload, including haemochromatosis and haemosiderosis. It is also contraindicated in patients with anaemias that are not caused by iron deficiency. Absolute exclusions further include patients with active gastrointestinal conditions, such as peptic ulceration or ulcerative colitis, and individuals receiving parenteral (injectable) iron therapy concurrently.

Age and Conditional Use

Adults and pregnant women (after the first trimester) are eligible for standard use. For pediatric populations, the official label recommends the oral solution form over solid tablets for children under six years of age. Conditional use is required for patients with a history of gastrointestinal disease or those receiving repeated blood transfusions, due to the risk of iron accumulation or irritation.

What should I know about interactions with other medicines?

Fisiofer's interaction profile, common to oral iron preparations, is primarily defined by a pharmacokinetic interaction wherein the iron cation interferes with the absorption of other substances in the gastrointestinal tract. This mechanism can reduce the systemic exposure and bioavailability of co-administered medicines, as documented in regulatory sources.

Interactions Affecting Co-administered Medicines

Official documents list several classes of medicines whose absorption is decreased by co-administration with oral iron. These include Tetracycline and Fluoroquinolone antibiotics, as well as agents such as Levothyroxine (thyroid hormone replacement), Levodopa, and Bisphosphonates. Co-administration with the heavy metal chelator Dimercaprol is restricted due to documented increased risk of nephrotoxicity.

Interactions Affecting Iron Absorption

Conversely, the absorption of Fisiofer may be reduced by specific substances. These include antacids and other pH-altering agents, Cholestyramine, and supplements containing other polyvalent cations like Calcium and Magnesium. Certain dietary items, such as milk, tea, coffee, and whole-grain cereals, are also documented to significantly impair oral iron uptake.

Administration Restrictions

To mitigate these absorption issues, official regulatory labeling requires a timing separation rule. Administration of oral iron and interacting agents such as antibiotics or thyroid medications must be separated by at least two hours, with separation of four hours or more required for certain agents like Bisphosphonates or Mycophenolate.

Mechanism of Action

Enhanced Iron Absorption and Bioavailability

This mechanism addresses the low natural bioavailability of dietary iron. Fisiofer acts as a direct substrate providing Ferrous iron ( Fe^2+), while the Ascorbic acid component enhances uptake by maintaining the Fe^2+ state, facilitating rapid transport into the bloodstream via the Divalent Metal Transporter ( DMT1) system.


Targeted Cellular Iron Delivery and Heme Synthesis Cascade

Once absorbed, iron binds to Transferrin and engages the body's native transport system. It is directed to target cells, primarily erythroid precursors, by binding to the Transferrin Receptor 1 ( TfR1). This delivery releases iron into the Labile Iron Pool ( LIP), where it acts as the limiting reagent for heme synthesis. The increased Fe^2+ drives the ferrochelatase enzyme in the mitochondria to complete the protoporphyrin ring. This forms functional hemoglobin that establishes the molecular structure required for systemic oxygen transport.

Dosage and Administration Information

The administration of Fisiofer, an oral iron solution or syrup, is based on standardized guidelines for ferrous iron preparations, focusing on accurate dosing and administration timing.

Administration Scope

Field Official Guidelines
Route of administration Oral
Dosing schedule (Adults) The therapeutic dosage for treating deficiency is typically 100 mg to 200 mg of elemental iron daily.
Timing in relation to meals May be taken with or without food. Taking it with food may minimize discomfort, though administration is often suggested between meals for optimal absorption.
Preparation requirements The dose must be measured precisely using a calibrated oral measuring device supplied with the product, not a common kitchen spoon.
Age-group administration rules Pediatric doses are typically calculated based on body weight (mg/kg/day).
Missed-dose rules If a dose is missed, take it upon remembering, but skip the dose if it is almost time for the next scheduled administration. A double dose must not be taken.
Special procedural conditions Oral iron should be administered with a separation interval of at least two hours from certain other oral medications, such as antacids or specific antibiotics, to prevent impaired drug absorption.

Resulting Procedural Structure

General procedural standards indicate that the liquid formulation must be accurately measured and swallowed according to the prescribed daily elemental iron content. Administration must adhere to specific timing constraints regarding meals and other oral drugs to ensure proper absorption. The full protocol dictates that the medicine course typically continues for several months, extending beyond initial improvement to guarantee the replenishment of the body's iron stores.

Recent Clinical Evidence

Research evidence / Overview of studies for Fisiofer

Evidence for Use in Iron Deficiency Anemia (IDA)

Research has widely examined cohorts with Iron Deficiency Anemia (IDA) who received oral iron supplements, including the active ingredient, Ferrous Succinate. This area has been evaluated through studies such as Randomized Controlled Trials (RCTs) and systematic reviews. Researchers monitored changes in core biomarkers, including Hemoglobin, Hematocrit, Serum Ferritin, and Transferrin Saturation. Studies monitored shifts in these markers over defined periods. The evidence for this use is derived from a high volume of established studies.

Studies in Latent Deficiency and Specific Contexts

Research has also explored cohorts with latent iron deficiency who received oral iron, primarily monitoring changes in iron stores (Ferritin). Fisiofer has also been studied for its observation in particular high-need groups, such as pregnant women. This research examined cohorts with specific characteristics and monitored specific outcomes related to iron status. The certainty for these clinical contexts is limited, as sample sizes were modest and evidence shows heterogeneity across studies.

Durability, Subgroups, and Uncertainty

Research typically focuses on short-term and intermediate follow-up durations. Consequently, there is limited information for long-term outcomes regarding the sustained durability of iron status. Specific subgroups were evaluated in research, including the pediatric population and cohorts related to gynecologic/obstetric care. For many conditions, subgroup findings are uncertain, and the results apply only to the populations studied. Key limitations include patient non-adherence, which may influence outcomes, and the fact that comparative evidence is lacking with all available iron salt formulations. Research highlights what is known and what is still uncertain.

Frequently Asked Questions (FAQ)

Common questions about Fisiofer (FAQ)


Q: What is the main difference between Fisiofer and a standard iron supplement?

A: Fisiofer contains Ferrous Succinate, which is one specific type of ferrous iron salt used in medicine. Official product information indicates that iron salts can vary in the elemental iron they supply and may be associated with different absorption or tolerability profiles.


Q: Can I take Fisiofer for general tiredness or fatigue?

A: According to official product information, this product is indicated for the treatment or prevention of confirmed iron deficiency and iron deficiency anemia. While fatigue is a recognized symptom of low iron levels, official sources typically indicate use is based on the confirmed diagnosis of iron deficiency.


Q: Can Fisiofer interact with common pain relievers like ibuprofen?

A: Official iron supplement labels caution that oral iron can potentially interfere with the absorption of many orally administered medications. Timing separation from all other oral medicines may be necessary, as iron can interfere with their absorption.


Q: Can Fisiofer affect the results of blood tests?

A: The purpose of this product is to restore iron levels. The product's purpose is to facilitate the change in the levels of blood markers, such as Hemoglobin and Ferritin, in individuals with iron deficiency. Regulatory information does not indicate the product causes false results for standard blood tests.


Q: Does Fisiofer interact with any common herbal supplements?

A: Iron is known to interact with substances containing other metallic ions or binding compounds. Regulatory warnings advise caution, specifically regarding supplements that contain polyvalent cations (positively charged ions) as these can impair the body's absorption of the iron compound. Timing separation may be required for co-administered supplements that contain polyvalent cations.


Q: Does taking Fisiofer affect my sleep?

A: Sleep disturbance is not commonly listed as an adverse reaction for oral iron. However, more detailed adverse reaction summaries for iron products sometimes include Central Nervous System (CNS) effects, which may affect rest or alertness.


Q: Can Fisiofer interact with medication for high blood pressure?

A: Yes, some specific anti-hypertensive drugs, such as Methyldopa, are documented to have significantly reduced absorption and effectiveness when taken concurrently with oral iron. To manage this interaction, regulatory information requires specific timing separation between the iron and the affected high blood pressure medication.


Q: Are there any specific warnings about Fisiofer and sun exposure?

A: No specific regulatory warnings, precautions, or adverse drug reactions related to photosensitivity or increased risk from sun exposure are listed in the official product information for this oral iron preparation.


Q: Is there any research on Fisiofer use in older adults?

A: Yes. Clinical summaries often reference studies that include older adult or geriatric populations. Studies show that lower elemental iron doses have been evaluated in this group, as they may achieve similar efficacy while often being associated with better gastrointestinal tolerability.

How should Fisiofer be stored and disposed of?

The storage and disposal instructions for Fisiofer Oral Solution are defined by regulatory labeling to maintain product quality and safety.

Required Storage and Handling

Storage Requirement Specification
Temperature Store at room temperature, between 15 C and 30 C (59 F to 86 F).
Protection Protect from light and moisture; protect from freezing.
Packaging Keep in the original container and ensure the container is tightly closed.
Child Safety Must be stored out of the sight and reach of children (due to the risk of iron poisoning).

Disposal

Do not use the product after the expiration date printed on the package. Unused or expired Fisiofer must be disposed of according to local legal requirements for pharmaceutical waste. Do not discard the medicine into household trash or wastewater unless specifically instructed by local authorities.

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

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