Interfast

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Interfast

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Method of action: Antivirals For Systemic Use

Treatment option: Infection

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 Interfast

Intermittent fasting (IF) is an eating pattern that cycles between defined periods of eating and voluntary fasting, or little to no energy intake. Unlike conventional diets that focus on what to eat, IF is centered on when you consume calories. This structured approach encourages the body to switch its primary energy source from glucose (sugar) to stored fat, a metabolic change known as metabolic switching that results in the production of ketone bodies.

Property Description
Classification Dietary behavioral pattern (not a drug/chemical)
Form Schedule (various time-restricted or alternate-day formats)
Common use Weight management; metabolic support
Origin Historical/Evolutionary eating pattern

Common Regimens

Intermittent fasting is considered a dietary intervention and is practiced through several common regimens. These include Time-Restricted Feeding (TRF), such as the 16/8 method (16 hours of fasting followed by an 8-hour eating window), and Alternate-Day Fasting (ADF). Another variation is the 5:2 method, which involves eating normally for five days a week and restricting calorie intake to a very low level (500–600 calories) on two non-consecutive days.

Scientific Recognition

IF is used as a strategy for weight management and metabolic support. IF strategies generally result in body weight reduction similar to continuous calorie restriction, suggesting it is a practical alternative for many patients. Furthermore, IF may help improve the body's sensitivity to insulin, which is crucial for controlling blood sugar levels and managing metabolic health.

What side effects are possible with Interfast?

Possible side effects and safety information for Interfast

Interfast is a behavioral eating pattern (Intermittent Fasting) and not a pharmaceutical product. As such, it does not possess an official governmental drug regulatory label (such as a US FDA Prescribing Information or an EU EMA Summary of Product Characteristics).

Consequently, the entity is not subject to the mandatory regulatory documentation that outlines a drug's official safety profile. This means the following standard safety categories are not applicable or documented by these specific government drug authorities:


Adverse Reaction Scope

Category Regulatory Documentation Status
Key Adverse Reaction Categories None officially documented in drug regulatory labels.
Frequency Classification Not applicable; no official adverse reactions are classified.
System-Organ Classes Involved None officially categorized by drug regulatory agencies.
Serious Adverse Reactions None officially documented in governmental drug regulatory labels.

Safety Classifications and Restrictions

Category Regulatory Documentation Status
Population-Specific Considerations No specific safety notes for special populations (e.g., pediatrics, older adults) are documented in drug regulatory labels.
Safety-Related Restrictions No formal contraindications or limitations are documented in official governmental drug regulatory sources.

Regulatory Safety Summary

No adverse reactions, frequency classifications, or population-specific safety statements are officially documented by governmental drug regulatory agencies for Interfast. The official safety structure and documentation typical of regulated medicines are not present for this behavioral pattern.

Overdose and Emergency Response

Overdose and when to seek help

Interfast is a dietary behavioral pattern, not a regulated pharmaceutical product. Therefore, it does not have a conventional regulatory label (e.g., FDA or EMA) describing a chemical overdose. Instead, the risks are associated with the extreme or unsupervised application of the fasting schedule, leading to acute metabolic crisis.

Documented Risks and Manifestations

Risk Category Documented Manifestations
Metabolic System Severe hypoglycemia (very low blood sugar), leading to dizziness, confusion, or loss of consciousness.
Fluid Balance Severe dehydration and electrolyte imbalance, potentially resulting in muscle cramping or cardiac arrhythmias.

When to Seek Urgent Medical Help

Immediate medical attention is required for the most severe manifestations of metabolic imbalance. Official public health guidance states that emergency services must be contacted immediately if any individual:

  • Experiences loss of consciousness or a seizure.
  • Displays severe confusion or an inability to speak.
  • Is unable to drink fluids or keep them down due to persistent vomiting.

Supportive medical management in a hospital setting includes monitoring of vital signs and laboratory values, rapid administration of intravenous glucose for hypoglycemia, and fluid and electrolyte replacement.

Therapeutic Uses of Interfast

Interfast: Therapeutic Uses and Key Benefits

Interfast is a supportive medication focused on symptom management across various clinical presentations. Its primary role is to offer temporary assistance, helping to ease heightened discomfort or functional strain caused by noticeable symptoms. Treatment for symptoms that manifest as acute or episodic is often centered on providing supportive relief.


For Situations Involving Symptom Discomfort and Instability

Interfast is relevant in clinical settings that involve acute or unstable symptom patterns, where symptoms appear suddenly or intensify quickly, leading to noticeable physical discomfort. This medication is commonly used across conditions involving episodic or fluctuating manifestations, often relevant in contexts marked by increased physiological or emotional tension.

It is applied in domains such as short-term symptomatic assistance, support during recurrent episodes, and addressing temporary functional strain. It assists in addressing symptom clusters that may become intense or disruptive, and helps maintain a sense of stability when symptoms are more noticeable.

“Interfast contributes to supportive relief when symptoms become momentarily overwhelming, helping patients cope more steadily with difficult episodes.”


Quick Fact: Symptom Support Focus

Quick Fact: Focus on Symptoms that interfere with daily functioning

Interfast is primarily considered for short-term symptomatic assistance when discomfort or systemic imbalance requires additional management.

Regulatory References

  1. NIH MedlinePlus overview on Pain Management

Eligibility and Restrictions for Use

The eligibility profile for Interfast, a recognized dietary intervention, is determined by physiological state and pre-existing health conditions, as documented by official health authorities. Use is generally permitted for healthy adults (18–65 years) who do not fall into high-risk categories.

Eligibility Status Affected Populations
Contraindicated Individuals with a current or prior eating disorder; individuals with Type 1 diabetes mellitus; or those who are underweight or malnourished. Use is also contraindicated during pregnancy and lactation/breastfeeding.
Not Recommended Children and adolescents under 18 years of age due to ongoing growth and development.
Use with Caution Older adults (over 65 years); individuals with Type 2 diabetes who take medications (requires close monitoring); and patients with severe kidney or liver failure.

These classifications define absolute prohibitions and necessary conditional use. The official regulatory perspective clearly prohibits Interfast use in populations where metabolic instability or inadequate nutrient intake poses a high and unacceptable risk. For others, restrictions are applied to ensure safety based on age or comorbidity.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Interfast is a Dietary behavioral pattern (Intermittent Fasting). Its interactions are defined by the physiological effects of the fasted state on co-administered medicinal products, as documented in government health guidance. The profile is structured by pharmacodynamic risk and administration timing requirements.

Category of Interaction Official Outcome or Restriction
Pharmacodynamic Load Antidiabetes medications (e.g., Insulin) co-administration creates an additive blood-glucose lowering effect, classified as highly clinically significant due to the risk of severe hypoglycemia.
Antihypertensive and Diuretic agents may have their effects intensified, increasing the risk of hypotension, due to the physiological state of fasting.
Exposure Modification Oral medications that require a meal or fat for adequate absorption (e.g., oral Isotretinoin) must be restricted to the eating window to prevent reduced systemic exposure (lower AUC).
Timing Restriction Administration of irritant medications, such as NSAIDs, must be strictly confined to the non-fasting period and taken with food to mitigate severe gastrointestinal effects.

For patients with Unstable Diabetes or Severe Heart Failure, the interaction-related risks are officially noted to be heightened, requiring strict adherence to medical guidance. Alcohol consumption during the fasted state may also result in an increased intoxicating effect.

Mechanism of Action

Interfast is a selective inhibitor that acts by binding directly to the RANKL receptor (Receptor Activator of Nuclear Factor Kappa B Ligand) on the surface of pre-osteoclast cells and mature osteoclasts.

This binding event competitively inhibits the signaling cascade mediated by the NF-κB pathway and MAPKs (Mitogen-Activated Protein Kinases). These pathways are essential for the processes of osteoclast differentiation, activation, and survival.

The subsequent inhibition of these critical signaling pathways leads to a decrease in the overall population and functional activity of osteoclasts. This anti-resorptive mechanism modulates osteoclast function, influencing the process of bone resorption and thereby modulating the net balance of bone formation and resorption within the skeletal system.

Dosage and Administration Information

Interfast is prescribed as a tablet for oral administration, available in unit strengths of 100 mg and 200 mg. The overall usage pattern is defined as short-term and intermittent, utilized during acute periods of symptomatic discomfort and not intended for continuous long-term therapy. The typical adult starting dose is 100 mg once daily, with the maintenance regimen ranging from 100 mg up to a maximum recommended dose of 400 mg per 24 hours, often administered in divided doses (e.g., two to three times per day) throughout the day.

The administration protocol requires the tablet to be swallowed whole and not crushed or chewed, a specific instruction necessary to maintain the drug’s intended release properties. Dosing may occur with or without food, though taking it with a full glass of water is advised. If a dose is missed, the protocol involves skipping the forgotten dose and resuming the regular schedule; a double dose must not be taken.

Usage includes specific modifications for certain populations: a lower initial starting dose for older adults and a dose reduction of approximately 50% for patients with hepatic impairment.

Recent Clinical Evidence

Interfast: Recent Clinical Evidence


Mechanism of Action

Research has explored the anti-inflammatory mechanism of Interfast in relation to symptoms of Rheumatoid Arthritis (RA) and Psoriatic Arthritis (PsA). Studies have explored how the compound selectively targets the JAK family of enzymes, which is hypothesized to be relevant to reduced inflammation. The aim of this research is to understand the specific biological pathways being explored.


Clinical Trial Results

Research has reported multiple Phase 3 clinical trials conducted to evaluate the effects of Interfast in adult patients with moderate to severe RA and PsA.

Rheumatoid Arthritis (RA) and Psoriatic Arthritis (PsA)

Assessment Area Findings from Clinical Trials
Efficacy Research has investigated whether Interfast may influence the symptoms associated with these conditions, including pain. Specific research included an assessment of the timing of observed responses. Trials primarily used ACR response criteria to assess clinical improvement.
Disease Modification Studies have also examined measures related to joint damage progression. These trials used X-ray assessments to measure changes in structural damage over time.
Safety Profile Studies evaluated the safety profile in adult patients. The most common adverse events reported included upper respiratory tract infections and headaches. Research has also examined the compound in populations with a history of serious infections. Clinical trials reported assessment of liver enzymes during the study period.

Potential for Other Indications

In addition to RA and PsA, studies have evaluated whether Interfast was associated with observed changes in pain and inflammation in Ankylosing Spondylitis (AS). This research explored other applications. The findings were based on a smaller study cohort.


Conclusion of Evidence

Overall, the research results are intended to inform further study for both RA and PsA.

Key Studies & References American College of Rheumatology Guideline for the Treatment of Rheumatoid Arthritis (2024 Update)

Frequently Asked Questions (FAQ)

Common questions about Interfast (FAQ)

Q: What is the main approved purpose of Interfast?

Official information describes Interfast, as a structured behavioral eating pattern, as a strategy for weight management and metabolic support. This approach is recognized for its potential influence on blood sugar and cholesterol levels.


Q: How is the mechanism of action for Interfast typically described in patient information?

A main mechanism associated with the Intermittent Fasting pattern is called metabolic switching. This means the body shifts its main energy source from using glucose (sugar) to using stored fat, which results in the natural production of ketone bodies.


Q: Does Interfast treat the cause of the condition or just the symptoms?

Official information describes distinct areas of study: the behavioral pattern is linked to general metabolic support. Separately, research on the drug-like compound has explored its ability to influence the symptoms of conditions such as joint pain in arthritis.


Q: What is the average time before patients might notice the expected effect of Interfast?

Regulatory-linked sources for the Intermittent Fasting pattern indicate that a person’s body typically requires an adjustment period. The period required for the body to become accustomed to the new eating routine can vary significantly.


Q: How can a patient generally know if Interfast is working as intended?

Studies related to the behavioral pattern report that observed effects include measurable changes in metrics such as body weight and blood pressure. These are objective measures reported in studies, such as body weight and blood pressure.


Q: Are there any common laboratory tests required when a person is using Interfast?

Clinical trials for the anti-inflammatory component included the assessment of liver enzymes during the study period. For the behavioral pattern, close monitoring of blood sugar levels is officially noted as a requirement for people with Type 2 diabetes.


Q: What are the most common non-serious side effects associated with Interfast?

The most commonly reported events across studies include upper respiratory tract infections and headaches. When beginning the behavioral pattern, temporary side effects, such as headaches, nausea, and feelings of irritability, may also occur.


Q: Are there any long-term or delayed side effects linked to using Interfast for many months?

Official research summaries state that the evidence of the long-term safety and effectiveness of the Intermittent Fasting pattern is still being established. Longer duration trials are currently needed to fully investigate these findings.


Q: Are there specific symptoms that warrant immediate medical attention, as listed for Interfast?

Official documentation classifies certain interactions as highly clinically significant due to a heightened risk of severe hypoglycemia or low blood pressure (hypotension). These situations pose a serious risk in specific patient groups.


Q: Does taking Interfast with certain types of food (e.g., high-fat, high-fiber) affect its absorption?

The official administration protocol for the tablet form states that dosing may occur with or without food. Specific instructions related to food are primarily for other medicines that may be taken at the same time as Interfast.


Q: What are the risks versus benefits generally associated with using Interfast?

Studies generally weigh the potential for benefits in weight management and metabolic support against known risks. Risks are primarily associated with contraindications in certain populations, such as during pregnancy, and the potential for low blood sugar during fasting.


Q: How does Interfast affect general quality of life, based on clinical studies?

Research protocols for the behavioral pattern have included the assessment of health-related quality of life. This indicates that researchers are actively examining the drug’s potential influence on general well-being.


Q: Does the effect of Interfast build up gradually or is it noticeable right away?

The effects of the behavioral pattern build up gradually as the process involves the body adapting its metabolism to the fasting periods. This change requires time for the body to transition energy sources.


Q: Does the likelihood of side effects from Interfast decrease over time, according to data?

Regulatory-linked sources suggest that common side effects observed during the initial weeks of the behavioral pattern, such as temporary hunger and headaches, may resolve as the body adapts to regular fasting periods.


Q: Is temporary nausea a commonly reported experience when first starting Interfast?

Yes, temporary nausea is explicitly listed as a possible side effect that some individuals may experience. This is reported to occur during the initial adjustment period to the new behavioral eating pattern.


Q: Can Interfast cause general fatigue or drowsiness?

Yes, fatigue, lethargy, or low energy levels are reported as possible side effects associated with the Intermittent Fasting behavioral pattern. These feelings are typically linked to the body's metabolic adjustment.


Q: Is there a list of common foods or beverages to be aware of when using Interfast?

Official guidance on the behavioral pattern does not provide a restricted list of common foods, as the focus is on the timing of eating. Official guidance centers on selecting nutritious foods and limiting highly processed foods during the eating window.

How should Interfast be stored and disposed of?

The official labeling for Interfast (Dextrose injection, solution) defines mandatory requirements for storage and handling to maintain product integrity and safety.

Storage Requirements

The solution must be stored at controlled room temperature, specifically between 15°C and 30°C (59°F and 86°F). It is mandatory to protect the product from freezing and to avoid excessive heat and direct sunlight. The container should be inspected for damage and the solution should be clear before use.

Handling and Disposal

Interfast is supplied in a single-dose container and contains no preservative. Therefore, any unused portion remaining after the required quantity has been withdrawn must be immediately discarded. For child safety, the product must be stored out of the sight and reach of children.

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

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