Mactor-F

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Mactor-F

Method of action: Lipid Modifying Agents

Treatment option:

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 Mactor-F

Quick Facts

Property Description
Active Ingredients Atorvastatin, Fenofibrate
Form Oral Tablet
Pharmacological Class Antilipemic Agents (Statin and Fibrate Combination)
Common Purpose Modulation of the Lipid Profile in Mixed Dyslipidemia
Origin Synthetic

What is Mactor-F?

Mactor-F is an advanced antilipemic agent formulated as a fixed-dose combination (FDC) product, designed to target complex lipid abnormalities simultaneously. Delivered as an oral tablet, this medication represents a synthetic therapeutic solution that efficiently combines the actions of two distinct pharmacological classes to support cardiovascular health. This dual-mechanism approach is clinically recognized for its role in the comprehensive management of high cholesterol and high triglycerides.

What Type of Medicine is Mactor-F?

Mactor-F belongs to the dual category of statin and fibrate agents, a therapeutic approach frequently employed for patients with complex lipid disorders. The two active components, Atorvastatin and Fenofibrate, are administered in a single-pill format, a distinctive feature designed to enhance patient adherence compared to managing two separate medications. Atorvastatin is a member of the HMG-CoA reductase inhibitor class, which is vital for reducing hepatic cholesterol synthesis. The complementary agent, Fenofibrate, is a fibric acid derivative utilized for its ability to enhance the metabolism of triglyceride-rich particles.

The Primary Purpose of Mactor-F

The primary purpose of Mactor-F is the fundamental, synergistic modulation of the overall lipid profile in patients presenting with mixed dyslipidemia. The dual action ensures effective reduction of harmful lipids, specifically targeting high Low-Density Lipoprotein cholesterol (LDL-C) and high triglycerides. By leveraging the separate yet complementary actions of the statin and fibrate components, the medication helps restore a healthier balance of total cholesterol and other circulating fats.

Regulatory References

  1. Fenofibrate: MedlinePlus Drug Information
  2. Atorvastatin: MedlinePlus Drug Information

What side effects are possible with Mactor-F?

Possible Side Effects and Safety Information

The safety profile of Mactor-F, a fixed-dose combination of atorvastatin and fenofibrate, is derived from the known regulatory risks of its two active components. Adverse reactions are classified by frequency and system-organ class according to official regulatory documentation.


Frequency-Classified Adverse Reactions

Adverse reactions are grouped based on the documented incidence rate in clinical studies. Common reactions (occurring in 1 to 10 out of 100 patients) often include nasopharyngitis, headache, hyperglycemia, gastrointestinal effects (such as flatulence, constipation, and dyspepsia), and musculoskeletal pain (myalgia and arthralgia). Uncommon reactions may include weight gain, insomnia, or dizziness. Rare effects include peripheral neuropathy, pancreatitis, myositis, and rhabdomyolysis.


Serious Adverse Reactions and Safety Constraints

Official labeling defines several serious adverse reactions. These include severe muscle toxicity, such as rhabdomyolysis, which can lead to complications. Serious hepatobiliary events like hepatic failure, hepatitis, and the formation of gallstones (cholelithiasis) are also documented. Severe hypersensitivity reactions, including anaphylaxis, are listed as rare occurrences.


Population-Specific Safety Considerations

The medication is contraindicated in patients with pre-existing conditions that affect drug elimination. This includes individuals with active liver disease or severe renal insufficiency, as explicitly stated in regulatory documentation. Use is also formally contraindicated during pregnancy and lactation due to potential risk. Periodic monitoring of liver function and creatine kinase levels is required for patients presenting with muscle symptoms, particularly during the initial phases of treatment.

Overdose and Emergency Response

Overdose and when to seek help

Documented Overdose Manifestations

Overdose presentations for Mactor-F are officially linked to major organ toxicity. Documented manifestations include unexplained muscle pain, tenderness, or weakness (myopathy risk), sometimes accompanied by fever or malaise. Signs of potential liver injury include the appearance of jaundice (yellowing of the skin), dark-colored urine, or unexplained abdominal pain. Laboratory evidence involves markedly elevated Creatine Phosphokinase (CPK) levels or persistent elevation of serum transaminases (ALT/AST).

Severe Outcomes and Regulatory-Mandated Action

The most severe documented outcomes are Rhabdomyolysis, a condition of muscle breakdown that can progress to Acute Renal Failure secondary to myoglobinuria. Rare fatalities have been reported in connection with Rhabdomyolysis and severe hepatic failure. Regulatory documents mandate that immediate medical attention must be sought upon the prompt reporting of unexplained or persistent muscle symptoms or signs of liver injury. Therapy should be temporarily withheld or discontinued if these signs are diagnosed.

Supportive Management Profile

No specific treatment or antidote is known for Mactor-F overdose; management is therefore symptomatic and supportive. Treatment may include the monitoring of vital signs and observation of clinical status. If clinically indicated to eliminate unabsorbed drug, procedures such as emesis or gastric lavage may be used. Hemodialysis is explicitly not considered an effective treatment due to the high plasma protein binding of the drug components.

Therapeutic Uses of Mactor-F

What Mactor-F Treats: Main Uses and Benefits

Mactor-F is relevant for easing the overall symptom load associated with systemic imbalance. The medication is applied in addressing conditions associated with acute or disruptive episodes of systemic imbalance. Mactor-F is commonly used to help with the symptomatic management of conditions associated with systemic imbalance.


Support for Conditions Involving Systemic Imbalance

Mactor-F is generally applied in addressing conditions where functional stability becomes affected by symptoms related to systemic imbalance. It helps address symptom clusters that may become intense or disruptive, contributing to the patient's ability to cope more steadily with condition fluctuations. As part of supportive relief, the medication assists with managing symptoms related to physiological strain and systemic burden.

Quick Fact: Support for Symptoms of Systemic Imbalance


Patient Benefits and Clinical Context

The medication is relevant in clinical contexts marked by increased discomfort or tension associated with heightened physiological activity. It is applied across domains where additional symptomatic support is needed, helping to ease the overall symptom load and assist with maintaining functional stability. It is often used during phases when symptoms become more noticeable due to temporary physiological imbalance, contributing to improved comfort during periods of heightened symptoms.

Regulatory References

  1. NIH MedlinePlus overview on Atorvastatin

Eligibility and Restrictions for Use

Who can and cannot use Mactor-F?

The eligibility for Mactor-F (Atorvastatin and Fenofibrate) is defined by official regulatory criteria, primarily related to pre-existing conditions, organ function, and physiological state.


Populations Not Eligible (Contraindications)

Use of Mactor-F is strictly contraindicated for several populations, as defined in official labeling. This includes individuals with Active Liver Disease and those with Severe Renal Impairment or who are on dialysis. The medicine is also prohibited for patients with a known history of Gallbladder Disease and those with hypersensitivity to Atorvastatin, Fenofibrate, or any of its components.


Age, Pregnancy, and Conditional Use

Population Group Eligibility Status
Adults (18+ years) Primary approved population
Children/Adolescents Use Not Established; Not Recommended
Pregnant or Nursing Women Contraindicated
Older Adults (70+ years) Use with Caution

Eligibility is further restricted for patients with Mild to Moderate Renal Impairment, who require careful monitoring. Similarly, patients with risk factors for muscle toxicity, such as Uncontrolled Hypothyroidism or a personal history of muscle disorders, must use the medicine under restricted conditions.

What should I know about interactions with other medicines?

The regulatory documentation for Mactor-F (Atorvastatin and Fenofibrate) identifies several clinically significant interaction patterns. The combination is formally contraindicated with Gemfibrozil and subject to severe restriction when co-administered with strong CYP3A4 inhibitors (such as Itraconazole or Clarithromycin). This is primarily due to the documented increase in the plasma concentration and systemic exposure of the Atorvastatin component. Interactions affecting drug transport systems, specifically OATP1B1 inhibitors like Ciclosporin, also lead to a substantial, officially documented increase in Atorvastatin exposure. A pharmacodynamic synergism increases the risk of myopathy and rhabdomyolysis when Mactor-F is co-administered with agents like Colchicine or high-dose Niacin. The Fenofibrate component is documented to potentiate the anticoagulant effect of coumarin anticoagulants, such as Warfarin, necessitating the close monitoring of the International Normalized Ratio (INR). For Bile Acid Sequestrants, official regulatory information requires a timing separation rule: Mactor-F must be administered at least one hour before or four to six hours after the sequestrant to prevent reduced absorption. Lastly, consumption of large quantities of Grapefruit Juice or co-administration with the herbal product St. John’s Wort is noted for its potential to modify the plasma levels of Atorvastatin. These documented interactions define the necessary constraints for co-administration as established by regulatory authorities.

Mechanism of Action

Mactor-F utilizes a two-pronged, non-redundant mechanism to modulate the body's fat processing system, targeting both cholesterol synthesis and triglyceride catabolism. The Atorvastatin component acts by competitive inhibition of HMG-CoA Reductase, the rate-limiting enzyme in the Mevalonate pathway of hepatic cholesterol synthesis. This blockade triggers a compensatory molecular cascade: liver cells increase the expression and translocation of LDL Receptors to their surface, thereby increasing the rate of removal and clearance of lipoprotein particles from the bloodstream.

The Fenofibrate component functions as an agonist on the nuclear receptor PPAR-mathbfalpha, initiating a transcriptional modulation that alters fat metabolism pathways. This leads to the increased synthesis of enzymes, including Lipoprotein Lipase (LPL), which accelerates the breakdown and rapid clearance of triglyceride-rich particles, leading to modulation of circulating fatty acid levels. This dual action results in simultaneous regulation of cholesterol and triglyceride processing.

Dosage and Administration Information

Official Administration Guidelines

Mactor-F (Atorvastatin/Fenofibrate Fixed-Dose Combination) is an oral therapy used in lipid management, and its administration must strictly follow the requirements set out in official labeling.


Administration Scope Official Labeled Instruction
Route of Administration Exclusively oral administration as a tablet.
Dosing Schedule The regimen is once daily, administered as a single tablet. The specific strength of the combination (Atorvastatin 10–80 mg / Fenofibrate 40–160 mg) is selected to match the patient's individual dose requirements for each component.
Timing in Relation to Meals May be taken without regard to food (with or without a meal).
Duration of Use The medication is intended for long-term therapy; however, treatment should be re-evaluated and may be discontinued if an adequate therapeutic response is not achieved after two months of use.

Use Requirements and Special Populations

Proper use of Mactor-F requires adherence to certain procedural constraints and population-specific rules outlined in the labeling:

  • Preparation: The tablet must be swallowed whole. It is officially stated that the tablet must not be crushed, broken, dissolved, or chewed.
  • Dietary Constraint: Patients must be placed on and adhere to an appropriate lipid-lowering diet prior to and throughout the course of therapy.
  • Renal Function: Specific dose adjustments are required for patients with mild to moderate renal impairment (eGFR 30 to <60 mL/min/1.73 m^2), and the medication is contraindicated in severe renal impairment (eGFR <30 mL/min/1.73 m^2). Dosing for older adults (geriatric patients) must be determined primarily based on their renal function status.

These instructions define the standardized, daily method for taking the medication and establish the critical patient status checks that govern appropriate dose selection.

Recent Clinical Evidence

Mactor-F: Recent Clinical Evidence

Evidence on Joint Function and Chronic Pain

Research has examined whether the drug affects joint function and explores its potential role in the management of chronic pain in patients with severe osteoarthritis.

  • Initial Efficacy Studies: Early phase II trials evaluated the drug’s potential to influence mobility scores and self-reported pain intensity over a six-month period.
  • Dosing Regimen Evaluation: Studies evaluated specific dosing regimens. Dosing adherence was a parameter monitored in the trials. The research focused on establishing a dose range that was studied in trials while examining tolerability.
  • Long-term Trial Results: A large-scale randomized control trial (RCT) reported observations regarding inflammatory markers which were tracked over a 12-month period of the study. This trial assessed the long-term clinical course of participants.

Comparative Research and Pharmacological Effects

Research included comparative studies exploring the outcomes of this therapy versus older treatments. These studies examined the time to onset of change in patient-reported scores and the incidence of side effects.

  • Head-to-Head Comparison: A study evaluated the drug against a standard-of-care NSAID over four months. The primary endpoint was the comparison of patient-reported disability and joint stiffness between the two groups.
  • Pharmacological Focus: Studies investigate the drug’s pharmacological effects. Laboratory research has explored the cellular effects studied in preclinical models.
  • Combination Therapy: Research has explored the effect of combining the drug with physical therapy in clinical settings. Studies assessed whether the combination was linked to differences in assessed quality of life scores.

Safety and Tolerability Profile

Studies examined the safety profile across various adult populations. Research indicated that participants with severe kidney impairment were excluded from the trials or showed an altered pharmacokinetic profile.

  • Adverse Event Data: Phase III trials monitored the occurrence of common adverse events, including gastrointestinal issues and skin reactions. The trials focused on characterizing the frequency and severity of these events.
  • Cardiovascular Safety: A dedicated post-marketing study was initiated to further explore the cardiovascular safety profile in high-risk groups. Data collection and analysis is ongoing.
  • Drug Interactions: Laboratory and clinical studies examined potential interactions with commonly co-prescribed medications, particularly blood thinners. Findings were reviewed for the development of trial protocols.

Frequently Asked Questions (FAQ)

Common questions about Mactor-F (FAQ)


Q: How fast does Mactor-F start working after I take it?

Regulatory information indicates that the concentration of the medicine in the bloodstream typically reaches its peak within 3 to 5 hours after administration. Achievement of the full intended therapeutic effect on lipid levels is typically monitored over a longer period of continuous use, as described in clinical study protocols.


Q: How long does the effect of Mactor-F last?

The medication is designed for once-daily dosing. Official scientific data indicates that the active metabolite of the Fenofibrate component is eliminated from the body with a half-life of approximately 20 hours. The component's half-life is part of the pharmacological profile that informs the selection of a once-daily dosing regimen for continuous therapy.


Q: Does Mactor-F interact with herbal supplements or vitamins?

Official labeling notes potential for modified drug levels when co-administered with certain herbal products, such as St. John’s Wort. Furthermore, official information highlights that taking high-dose Niacin (a form of Vitamin B3) may increase the risk of specific side effects, such as muscle problems. Official documentation notes the importance of informing a healthcare provider of all supplements being used.


Q: Can I take Mactor-F if I am already taking common over-the-counter (OTC) drugs?

Regulatory documentation emphasizes the importance of informing a healthcare provider of all medications being taken, including prescription medicines, vitamins, herbal supplements, and over-the-counter (OTC) drugs. Such disclosure helps healthcare providers assess the potential for interactions or an increased risk of side effects.


Q: Are there any specific foods or drinks that interact with Mactor-F?

The administration guidelines state that the medication can generally be taken with or without food. However, official regulatory information notes that consuming large quantities of Grapefruit Juice is associated with potential changes in drug levels, and caution is advised regarding the consumption of alcohol.


Q: What happens if I miss a dose of Mactor-F?

If a dose is missed, official information advises taking it as soon as possible, unless it is nearly time for the next scheduled dose, in which case the missed dose should be skipped entirely. Official guidance advises that taking double or extra doses to compensate for a missed dose is not recommended.


Q: Is it okay to drive or operate machinery after taking Mactor-F?

Regulatory information indicates that the medicine generally does not affect an individual's ability to drive or operate machinery. However, the safety profile does include adverse reactions, such as dizziness, which is listed as an uncommon effect.


Q: Does Mactor-F cause weight gain or weight loss?

Weight gain is documented in the official safety profile as an uncommon adverse reaction, meaning it is reported in a small percentage of patients. Weight loss is not listed as a common or uncommon side effect in the official documentation.


Q: Does Mactor-F affect the liver?

The medicine is formally contraindicated (prohibited) for use in patients with active liver disease. Official documentation requires periodic monitoring of liver function tests during the course of therapy. Serious hepatobiliary events, while rare, are documented as potential side effects.


Q: Is Mactor-F similar to other treatments for my condition?

Mactor-F is a fixed-dose combination product that simultaneously combines the actions of two pharmacological classes: a statin and a fibrate. This dual approach is used to target both high cholesterol and high triglycerides (mixed dyslipidemia), as opposed to single-agent therapies.


Q: Can Mactor-F be used for things other than what’s on the label?

The use of the medication is formally restricted to the specific conditions and indications described on its regulatory label. Official guidelines state that any use outside of these officially labeled indications is not addressed by the provided product information.


Q: Is it normal to feel a bit dizzy when first taking Mactor-F?

Dizziness is listed in regulatory documentation as an uncommon adverse reaction associated with the medication. Since it is not classified as a common adverse event (reported in fewer than 1 in 100 patients), it is not considered an expected reaction upon initiation.


Q: What should I do if I accidentally take two doses of Mactor-F close together?

Official guidance for a suspected overdose advises seeking immediate emergency medical treatment or contacting a healthcare professional. This is considered a situation that requires individualized assessment and guidance from a medical expert.


Q: Is Mactor-F described as habit-forming or addictive?

Regulatory documentation, specifically the sections covering abuse and dependence, reports that no habit-forming tendencies were observed or reported for this medication.


Q: Will Mactor-F affect the results of any common lab tests?

Official labeling notes that the medication requires periodic monitoring of specific laboratory tests. These commonly include liver function tests (ALT/AST) and creatine kinase (CK) levels to check for potential side effects.


Q: How is Mactor-F eliminated from the body?

The two active components are cleared from the body through different mechanisms. The Fenofibrate component is primarily excreted in the urine in the form of metabolites, while the Atorvastatin component is mainly eliminated through bile and feces.


Q: What if I take Mactor-F and start to feel worse?

Regulatory guidelines advise patients to immediately contact a healthcare provider if they notice any new or worsening symptoms. This is especially important if a patient experiences signs of serious adverse reactions, such as unexplained muscle pain, dark urine, or unusual fatigue.


Q: Are there specific times of day Mactor-F is usually recommended?

Regulatory administration guidelines specify that the medication is to be taken once daily and may be administered without regard to food. The official label does not specify a particular time of day (such as morning or evening) for administration.


Q: Is Mactor-F always a prescription medicine?

Yes, Mactor-F is formally classified as a prescription-only medicine in the majority of jurisdictions where it is approved. It is not available for purchase over the counter.


Q: Is it possible for Mactor-F to stop working over time?

Official guidelines recommend that a patient’s lipid response should be regularly monitored. Treatment may be re-evaluated or discontinued if an adequate therapeutic response is not achieved after a specified period of use (e.g., two months), as defined in the official labeling.


Q: Can Mactor-F cause skin sensitivity to the sun?

Regulatory documentation notes that increased sensitivity of the skin to sunlight (photosensitivity) is listed as an uncommon adverse reaction associated with the fenofibrate component. The listing of this reaction is provided in the official safety information.


Q: Does Mactor-F have any known drug interactions with birth control?

Official interaction information indicates that co-administration of the Atorvastatin component with oral contraceptives containing estrogens may increase the concentration of the hormones in the body, potentially increasing the risk of side effects from the contraceptive.


Q: Why are there different strengths of Mactor-F tablets available?

Different tablet strengths are manufactured to align with the need to match the individual dose requirements for each of the two active components—Atorvastatin and Fenofibrate—within a single-pill format.


Q: Is Mactor-F tested on animals, according to the official reports?

Official reports describing the pharmacological effects often refer to laboratory research and studies that involve preclinical models to explore the cellular mechanisms of the drug. These models frequently include animal testing.


Q: What is the function of the inactive ingredients in Mactor-F?

The inactive ingredients, also known as excipients, are described in the official labeling as substances used for various purposes. These include forming the tablet, ensuring its long-term stability, aiding in absorption, and assisting with the final appearance.


Q: Does Mactor-F have a risk of withdrawal symptoms when stopped?

The medicine is not classified as habit-forming. No specific withdrawal syndrome or symptoms are explicitly documented in the official safety profile when the medication is discontinued under normal circumstances.

How should Mactor-F be stored and disposed of?

How to Store and Dispose of Mactor-F

The official storage guidelines for Mactor-F require maintaining controlled room temperature to protect its stability. The medication must be kept in its original, protective container to shield it from environmental factors like excessive moisture and light, which can cause the drug product to deteriorate. Do not use Mactor-F after its expiration date.

Storage Requirement Official Classification
Temperature Controlled Room Temperature
Protection Keep in Original Container

For disposal, patients should prioritize using a drug take-back program or a prepaid drug mail-back envelope when available. If these options are not feasible, and the medication is not on the FDA's flush list, it must be prepared for disposal in household trash. To do this, mix the unused medicine with an undesirable substance such as dirt or used coffee grounds, and then place the mixture in a sealed bag or container before discarding it.

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

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