Sideral

Quick links to important sections

Sideral

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 Sideral

Quick Facts

Property Description
Active ingredient Sildenafil (as Sildenafil citrate)
Form Film-coated tablets
Pharmacological class Phosphodiesterase type 5 (PDE5) inhibitor
Common use Supporting functions requiring enhanced localized blood flow
Origin Synthetic compound (Pyrazolopyrimidinone derivative)

Defining Sideral: A Selective PDE5 Inhibitor

Sideral is a specific synthetic medicinal agent brand containing the active substance Sildenafil. Pharmacologically, it is classified within the class of Phosphodiesterase type 5 (PDE5) inhibitors. The drug is designated as a prescription-only medicine, signifying that its procurement and use must be authorized by a healthcare professional. Sildenafil is known for its selective inhibition profile against the PDE5 enzyme, confirming a targeted action within the body's systems.

Composition, Form, and General Purpose

Sideral is prepared as an oral preparation, supplied in the form of film-coated tablets suitable for peroral administration. The medication is a single-ingredient product, containing the active component as Sildenafil citrate. While the INN Sildenafil is available under many trade names, Sideral represents a specific manufacturer's formulation, often optimized for market distribution. The general function of Sideral is to support or restore specific physiological functions dependent on robust localized blood flow. The drug's inhibitory action allows a natural signaling molecule to persist, which induces smooth muscle relaxation and resultant vasodilation in target areas. This essential process provides a mechanism to enhance blood circulation, which is required for appropriate physiological responses.

What side effects are possible with Sideral?

Possible Side Effects and Safety Information

The safety profile of Sideral (Sildenafil) is officially documented by regulatory authorities, classifying possible adverse reactions by frequency and physiological system. This information defines the medicine's risk characteristics and constraints on use.


Frequency and Systemic Adverse Reactions

Adverse reactions are formally categorized based on their rate of occurrence in clinical trials and post-marketing surveillance:

Classification System-Organ Class (Examples)
Very Common Nervous System (Headache), Vascular (Flushing)
Common Nervous System (Dizziness), Gastrointestinal (Dyspepsia), Eye Disorders (Visual disturbance, blurred vision), Respiratory (Nasal congestion)
Rare Reproductive System (Priapism), Eye Disorders (NAION), Cardiac (Sudden cardiac death)

Serious Adverse Reactions and Restrictions

Regulatory labels highlight rare but clinically serious events, including Non-arteritic anterior ischemic optic neuropathy (NAION), which can cause decreased vision, and sudden decrease or loss of hearing. The risk of Priapism (a prolonged erection) is also documented.

Sideral is subject to specific safety restrictions. It is contraindicated for use in patients taking any form of nitrates or nitric oxide donors due to the potential for a dangerous drop in blood pressure. Use is also contraindicated in patients with a recent history of stroke or myocardial infarction, severe hypotension, and certain hereditary retinal disorders. Caution is noted for patients with conditions predisposing to Priapism or severe hepatic impairment.

Overdose and Emergency Response

Iron poisoning, often resulting from an acute overdose of iron-containing supplements like Sideral, is a serious medical emergency, particularly in children. Iron toxicity progresses through several stages, starting with corrosive effects on the gastrointestinal tract.

Potential Symptoms of Acute Iron Overdose

Early Symptoms (within 6 hours) Later Symptoms (6–72 hours)
Severe vomiting, often bloody (hematemesis) Appearance of temporary improvement (latent phase)
Diarrhea, sometimes bloody (melena) Shock (low blood pressure) and metabolic acidosis
Abdominal pain Liver damage/failure, jaundice, and seizures

Ingestion of elemental iron doses exceeding 20 mg/kg of body weight can cause gastrointestinal symptoms, while doses above 60 mg/kg are associated with the potential for severe, systemic toxicity, and doses > 120 mg/kg are potentially lethal. Because the body lacks an efficient mechanism to excrete large amounts of excess iron, prompt medical intervention is crucial.

When to Seek Help

Immediately contact emergency medical services or a poison control center if a known or suspected overdose occurs, regardless of the presence of symptoms. The rapid progression from mild symptoms to severe multi-system failure requires urgent medical evaluation and supportive care. Do not wait for symptoms to worsen or subside. Take the product container to the healthcare facility for accurate identification of the amount ingested.

Therapeutic Uses of Sideral

What Sideral Treats: Main Uses and Benefits

Sideral (Sildenafil) is commonly used to help manage conditions linked to organ-specific functional stress and is relevant for easing symptoms associated with Erectile Dysfunction (ED) and Pulmonary Arterial Hypertension (PAH).

Supportive Management for Impaired Sexual Function

Sildenafil is used for managing the symptomatic cluster of Erectile Dysfunction (ED), characterized by the inability to achieve or maintain a penile erection adequate for satisfactory sexual performance. The medication is commonly used across conditions presenting with episodic manifestations of rigidity loss, and it may assist with supporting the patient in achieving physiological function. This is relevant for patient groups such as adult men with associated diabetes mellitus.

Quick Fact: Relevant for Impaired Rigidity Symptoms

Improving Functional Status in Pulmonary Arterial Hypertension

The medication is also relevant for easing symptoms in the chronic management of Pulmonary Arterial Hypertension (PAH), a severe condition marked by high blood pressure in the lung arteries. Sideral is used for managing symptom clusters that interfere with daily functioning, including debilitating shortness of breath and a profound reduction in exercise capacity. In this context, the supportive benefit is considered relevant for easing symptomatic distress, which may help patients cope more steadily with their condition, and may assist with maintaining functional stability. This is relevant for adult men and women, as well as select pediatric patients.

The therapeutic domains relevant to Sideral include the management of Erectile Dysfunction and the chronic supportive care for Pulmonary Arterial Hypertension.

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Sideral is marketed as a dietary supplement and contains iron, which necessitates specific regulatory warnings regarding its use. The official labeling specifies distinct populations for whom the product is intended, prohibited, or requires special consideration.

Eligibility Profile

Classification Populations as per Official Labeling
Allowed For adult use only.
Prohibited Children under 6 years of age.
Restricted Use Individuals who are pregnant or nursing; individuals who anticipate surgery; and those who take medication on a regular basis or are otherwise under medical supervision.

Key Eligibility Constraints

Contraindications (Formal Prohibitions): The product labeling does not contain formal medical contraindications, which is typical for a dietary supplement. The key safety prohibition, based on the iron content, is the mandatory warning to keep the product out of the reach of children.

Warning for Pediatric Use: Accidental overdose of iron-containing products is the leading cause of fatal poisoning in children under 6. This absolute warning is a mandated statement on the packaging to prevent use and access by this age group.

Special Consideration: The product is explicitly for adult use only. Specific adult groups—including pregnant or nursing individuals, those anticipating surgery, or individuals with existing medical conditions—are advised to consult a healthcare practitioner before using the product.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Sideral (Sildenafil) interactions are formally classified based on two main mechanisms: pharmacodynamic potentiation and altered pharmacokinetic exposure, as documented in official regulatory labeling.

Contraindicated Combinations

Co-administration with organic nitrates or nitric oxide donors (in any form) is strictly prohibited due to the severe risk of life-threatening hypotension. Similarly, combination with Guanylate Cyclase (GC) Stimulators (e.g., riociguat) is also contraindicated due to documented potentiation of pressure-lowering effects.


Pharmacokinetic and Timing Constraints

Sildenafil is primarily cleared through the CYP3A4 metabolic pathway, making its systemic exposure sensitive to interacting agents. Co-administration with strong CYP3A4 inhibitors (e.g., Ritonavir, Ketoconazole) reduces Sildenafil clearance, leading to significantly increased plasma concentrations; for instance, Ritonavir is documented to increase Sildenafil exposure by up to eleven-fold. This necessitates specific timing constraints; for example, a maximum single Sildenafil dose must not exceed 25 mg within a 48-hour period when used with Ritonavir.

Interactions with alpha-blockers may cause additive blood pressure lowering, with the highest risk of symptomatic hypotension being time-dependent, occurring within 4 hours of Sildenafil administration. Additionally, official regulatory notes indicate that Sildenafil clearance is reduced in populations with severe hepatic or renal impairment, which increases systemic exposure and modifies the overall interaction risk.

Mechanism of Action

Targeted Inhibition of the PDE5 Enzyme

Sildenafil is a selective competitive inhibitor of the Phosphodiesterase Type 5 (PDE5) enzyme, which is responsible for hydrolyzing cGMP in specific vascular smooth muscle cells. By preventing this degradation, the drug conserves and elevates the cellular concentration of the second messenger, which is the necessary biochemical step for initiating smooth muscle relaxation.


Amplification of the NO-cGMP Signaling Pathway

The drug's mechanism strictly amplifies the body's natural Nitric Oxide (NO)-cGMP pathway, rather than activating it directly. This pathway amplification promotes a biochemical cascade that reduces intracellular calcium, resulting in the relaxation of vascular smooth muscle. This physiological change reduces local resistance, facilitating increased blood inflow.


Mechanism Specificity and Constraints

The high specificity for PDE5 ensures the primary effect is focused on facilitating localized vasodilation in responsive tissue. However, this action is NO-dependent, meaning it only functions when the body releases the NO signal, and its profile includes a known cross-selectivity for the PDE6 enzyme, which can induce functional constraints related to its affinity for the PDE6 enzyme.

Dosage and Administration Information

How Sideral is Used: Official Administration Guidelines

The usage of Sildenafil, the active substance in Sideral, is defined by two distinct administration schedules based on the therapeutic need. The medicine is primarily administered orally via film-coated tablets or oral suspension, though an intravenous (IV) injection is also approved for temporary use in Pulmonary Arterial Hypertension (PAH).

Dosing and Frequency Patterns

For Erectile Dysfunction (ED), Sildenafil is used on an as-needed basis, not as a daily regimen. The standard starting dose is 50 mg, taken approximately 30 minutes to 4 hours prior to anticipated activity. The allowed dosage range is 25 mg to 100 mg, and the frequency must not exceed once per day.

For the Pulmonary Arterial Hypertension (PAH) regimen, Sildenafil is used on a fixed, continuous schedule. The standard oral dose is 20 mg, administered three times a day (TID), with doses typically spaced 4 to 6 hours apart. The corresponding IV dose is 10 mg TID, intended for when oral intake is temporarily not possible.

Contextual Administration Rules

Sildenafil tablets may be taken with or without food. However, official documentation notes that consumption with a high-fat meal may delay the onset of the medicine's activity. For specific patient groups, the starting dose for ED use requires adjustment. A lower starting dose of 25 mg is advised for older adults (aged 65 years and over) and for individuals with documented severe renal or hepatic impairment, reflecting label-based constraints on systemic exposure. Additionally, when Sildenafil is co-administered with certain other medications, the ED dose is restricted to a maximum of 25 mg within a 48-hour period.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Summary of Key Findings: Phase III Trials

The clinical trials included a phase dedicated to investigating how the drug affects an inflammatory pathway. Research focused primarily on individuals with moderate-to-severe disease.

  • Symptom Score Assessment: In the core studies (N=1,200), research indicated that participants receiving the drug demonstrated a statistically different change in symptom scores compared to placebo at the 12-week endpoint. This difference was noted through 52 weeks in a subset of participants.
  • Flare-Up Frequency Assessment: One primary focus of the research was the assessment of flare-up frequency during the study period. One major study (N=800) observed a lower rate of moderate-to-severe flare-ups in the treatment group versus the placebo group.
  • Quality of Life (QoL): A secondary analysis concentrated on evaluating the effect of the treatment across diverse patient groups by examining changes in validated Quality of Life scales. The analysis indicated that the average change in QoL scores was statistically different compared to baseline.
  • Systemic Therapy Evaluation: A secondary objective of the trials was the evaluation of systemic therapy requirements during the study follow-up. Findings suggested that a smaller percentage of participants in the treatment group required escalation to systemic therapies within a 1-year follow-up period.

Research on Combined Use

Research has also been conducted to explore the use of the drug with Topical A.

  • Effect on Immune Markers: The combination study included an investigation of the treatment's effect on immune markers, specifically regulatory T-cell populations.
  • Safety Profile: Studies noted a potential drug-drug interaction when use was studied with Drug X, which may warrant further clinical investigation. This interaction was not noted when combined with Topical A.

Safety and Tolerability Data

The safety profile was characterized using data from more than 3,000 participants in the clinical program.

  • Adverse Event Reporting: The most frequently reported adverse events in the studies included injection site reactions and mild headache.
  • Serious Adverse Events (SAEs): Serious adverse events were reported for less than 2% of participants, with similar proportions noted in both the study and control groups.

Frequently Asked Questions (FAQ)

Common questions about Sideral (FAQ)

Q: How is Sideral different from standard iron tablets?

A: Sideral is a dietary supplement containing a unique form of iron called Sucrosomial® Iron (iron pyrophosphate), which differs from standard iron salts like ferrous sulfate. Official product information notes this technology is designed to support the iron's bioavailability and is often cited for potential improved tolerance compared to traditional iron salts.


Q: What does 'sucrosomial iron' mean in simple terms?

A: Sucrosomial iron refers to iron pyrophosphate that is encased in a protective matrix, sometimes referred to as a sucrosome. This mechanism, as described in regulatory text, utilizes a protective matrix that is intended to help the iron pass through the stomach environment intact, promoting absorption later in the intestine.


Q: How does the unique coating of Sideral help with absorption?

A: The specialized technology aims to protect the iron as it travels through the acidic environment of the stomach. The mechanism aims to deliver the iron to the intestine, where it is intended to be absorbed, which the manufacturer states supports increased bioavailability.


Q: Is Sideral absorbed better than ferrous sulfate?

A: The official product information from the manufacturer cites studies and claims of high bioavailability when compared to traditional iron salts.


Q: Does Sideral require stomach acid for proper absorption?

A: The sucrosomial technology is designed to protect the iron from the acidic environment, which is intended to reduce reliance on gastric dissolution for absorption. This differs from the way standard iron salts typically work.


Q: Why is Sideral recommended for people who have had bariatric surgery?

A: Individuals who have undergone bariatric surgery often have concerns about nutrient absorption. High-bioavailability iron supplements are often explored as options for individuals with increased iron needs or absorption challenges, such as those following bariatric surgery.


Q: Can I combine Sideral with a multi-vitamin that also contains iron?

A: The product’s label includes a mandatory warning about the risk of iron overdose. Because combining multiple iron-containing supplements increases the total intake, it is necessary to consult with a healthcare practitioner before combining products to ensure iron intake remains within safe limits.


Q: Can Sideral be taken at the same time as Vitamin C?

A: Yes. According to the product's Supplement Facts, Sideral is often formulated to include Vitamin C (as Ascorbic Acid) within the same dosage form (capsule or stick). This indicates the ingredients are compatible to be taken together.


Q: Is there a taste associated with taking Sideral?

A: Official information on the inactive ingredients for the oral powder formulation (like Sideral Folic) lists sweeteners like Sucralose and Acesulfame Potassium, as well as Citric Acid for flavoring. This suggests the product has a developed and intentional taste profile.


Q: Can Sideral be crushed or chewed, or must it be swallowed whole?

A: The administration advice depends on the formulation. The oral powder version (Sideral Folic) is designed to be dissolved directly in the mouth. The capsule products (like Sideral Forte) are generally intended to be swallowed whole.


Q: Is it normal to feel slightly nauseous when first starting Sideral?

A: The Sideral formulation is intended to minimize gastrointestinal issues like nausea, which are common with traditional iron supplements. Nausea is generally less likely with this specific formulation due to the protective technology.


Q: Why do some people switch from traditional iron to Sideral?

A: According to the official health claims, the Sucrosomial Iron technology is designed to help users avoid gastric disorder (stomach upset) and increase absorption. These factors are common reasons why a person might explore an alternative to traditional iron salts.


Q: Is Sideral approved in countries outside of Europe?

A: Yes, Sideral product information is available on the US DailyMed database, which includes FDA label information. This confirms the product's market presence and regulation in the United States.


Q: What is the difference between Sideral Forte and the standard Sideral product?

A: Sideral is available in different formulations, such as Sideral Forte (a capsule) and Sideral Folic (an oral powder). These product variations often indicate differences in the dosage form and the inclusion of other vitamins, such as folic acid.


Q: Is Sideral iron suitable for people with inflammatory bowel diseases?

A: Although regulatory documents do not specifically name inflammatory bowel diseases (IBD), the product is described as being gentle on the stomach and designed to avoid gastric disorders. This makes high-bioavailability iron an option often considered by those with gastrointestinal sensitivities.

How should Sideral be stored and disposed of?

How to Store and Dispose of Sideral?

This section outlines the official requirements for storing and disposing of Sideral, based on regulatory documentation for maintaining product integrity and safety.

Storage Requirement Official Guideline
Temperature Store below 25 C (room temperature).
Environmental Protection Keep protected from moisture, direct heat, and light.
Handling Keep the product in its original packaging until use.
Child Safety Keep out of the sight and reach of children.
Disposal Dispose of any unused, expired medicine or empty packaging according to local governmental waste management regulations. Do not flush unused medicine or dispose of it in household trash.

Storing the product as directed ensures its stability and effectiveness until the expiration date. Adherence to disposal guidelines prevents environmental contamination and accidental exposure.

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

Equivalent of Sideral found in:

A-Z Index: