Advertisements

Cidophage Ret.

Quick links to important sections

Cidophage Ret.

Advertisements
Advertisements

Medically reviewed

Marina Burgos

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.

Advertisements

Overview of Cidophage Ret.

Property Description
Active Ingredient Metformin Hydrochloride
Form Extended-release (Retard) oral tablet
Pharmacological Class Biguanide Antihyperglycemic Agent
General Purpose Management of high blood sugar levels (hyperglycemia)
Origin Synthetic compound

Defining Cidophage Retard: Identity, Form, and Classification

Cidophage Retard is a prescription-only medication classified as an oral antihyperglycemic agent belonging to the biguanide class. It is composed of the active ingredient, Metformin Hydrochloride, and is delivered as a specialized oral tablet. Metformin is a synthetic drug used to lower blood glucose levels.

The specific designation "Retard," or "Ret.," in the product name is a key distinguishing factor, signifying its extended-release formulation. This specialized oral tablet utilizes a matrix system to control the release of Metformin Hydrochloride slowly and consistently into the body after oral administration, differentiating it from standard, immediate-release Metformin. This continuous delivery approach is recognized for supporting steady sugar level management over longer periods.


The Purpose and Role of Metformin Hydrochloride

The central therapeutic purpose of Metformin Hydrochloride is to assist in stabilizing and managing elevated blood sugar levels, known as hyperglycemia, typically in adults and pediatric patients with Type 2 diabetes mellitus. Metformin is an effective first-line agent for improving blood sugar control, which supports the drug’s position as a reliable therapeutic tool for achieving long-term glucose balance.

This medication achieves its general benefit by influencing metabolic function, primarily by reducing the amount of glucose the liver produces and releases into the bloodstream. It also enhances the body’s sensitivity to its own insulin, thereby improving the overall metabolic response to sugar. This foundational action establishes the drug's role in providing necessary metabolic support to manage hyperglycemia.

Regulatory References

  1. NIDDK Diabetes Information
Advertisements

What side effects are possible with Cidophage Ret.?

Possible Side Effects and Safety Information

The safety profile of Cidophage Ret. (extended-release metformin) is defined by common gastrointestinal disturbances and a rare, but serious, risk of a metabolic complication.


Serious Safety Considerations

  • Lactic Acidosis (Boxed Warning): This is a rare, severe, and potentially fatal buildup of lactic acid in the blood. The risk is significantly increased in the presence of certain conditions, including impaired kidney function (where the medicine is contraindicated in severe cases, defined as eGFR < 30 mL/min/1.73 m^2), excessive acute or chronic alcohol intake, dehydration, sepsis, or acute heart failure. Symptoms are often non-specific, such as unusual muscle pain, malaise, somnolence, and rapid breathing, requiring immediate medical attention.
  • Vitamin B12 Deficiency: Long-term use of this medication may lead to decreased Vitamin B12 levels, which can result in hematological changes or neuropathy. Regular monitoring of hematological parameters is recommended.

Common Adverse Reactions

The most frequently reported side effects are dose-related and typically occur when treatment is initiated. These are primarily gastrointestinal disorders (very common, >10% incidence in clinical trials) and include:

  • Diarrhea
  • Nausea and Vomiting
  • Flatulence and Abdominal Discomfort
  • Headache and a Metallic Taste in the mouth (common, 1%–10% incidence)

Taking the extended-release formulation with a meal, particularly the evening meal, may help mitigate these common effects.


Safety Restrictions and Monitoring

  • Contraindications include severe renal impairment and acute or chronic metabolic acidosis (including diabetic ketoacidosis).
  • Required Discontinuation: The medication must be temporarily withheld for specific procedures, such as radiologic studies involving intravascular iodinated contrast materials, or for any surgical procedure necessitating restricted intake of food or fluids.
  • Monitoring: Renal function (eGFR) must be assessed prior to treatment initiation and monitored periodically thereafter due to its critical role in clearing the drug from the body.
Advertisements

Overdose and Emergency Response

Overdose and When to Seek Help

The most serious risk associated with an overdose of Cidophage Ret. (metformin hydrochloride extended-release) is Lactic Acidosis. This is a life-threatening medical emergency where excessive metformin accumulates in the body, typically characterized by elevated blood lactate levels and an acid imbalance.

Documented Overdose Manifestations

Symptoms of Lactic Acidosis can be subtle at first and include nonspecific signs such as malaise, severe tiredness, muscle pain (myalgias), abdominal pain, and somnolence. If untreated, this condition can progress rapidly to severe outcomes, including respiratory distress, hypothermia, low blood pressure (hypotension), and resistant heart rhythm problems, potentially leading to death.

Immediate Actions and Emergency Care

Immediate medical attention must be sought if an overdose is suspected, even if symptoms are not yet severe. The patient must stop taking the medicine immediately. Because of the high risk of fatal progression, the official management for severe metformin overdose involves Hemodialysis. Hemodialysis is the most effective procedure for removing accumulated metformin from the bloodstream and correcting the severe acidosis and metabolic disturbances.

Population-Specific Overdose Risks

The risk of developing Lactic Acidosis following overdose or accumulation is significantly higher in patients with existing renal impairment, advanced age (typically 65 years), or conditions causing hypoxia, such as unstable heart failure or severe infection.

Advertisements

Therapeutic Uses of Cidophage Ret.

What Cidophage Ret. Treats: Main Uses and Benefits

Cidophage Ret. is primarily used to address symptoms related to chronic high blood sugar (hyperglycemia) in individuals with Type 2 Diabetes Mellitus. It is also commonly considered relevant for managing systemic imbalance features in conditions such as Polycystic Ovary Syndrome (PCOS). This medication helps address symptoms that create noticeable physiological strain, such as extreme thirst and fatigue, which often create noticeable interference with daily stability. A primary therapeutic benefit is its common use for symptomatic relief, which contributes to easing the overall symptom load.

The medication is generally applied in contexts where additional symptomatic support is needed for long-term patient health. By helping with the long-term management of stable blood sugar, the drug may be part of symptomatic management that supports the reduction of risk factors for the development of chronic disease-related manifestations. It is relevant in situations where patients experience symptomatic discomfort, which supports the patient during difficult episodes by easing distress.


Quick Fact: Relief for Systemic Imbalance The medication is relevant for easing symptoms associated with long-term systemic or localized discomfort related to chronic high blood sugar.

Regulatory References

  1. NIH MedlinePlus overview
Advertisements

Eligibility and Restrictions for Use

Who can and cannot use Cidophage Ret.?

Official regulatory documents define patient eligibility for Cidophage Ret. (Metformin Extended-Release) based on specific conditions and risk factors. The medication is contraindicated in patients with severe renal impairment, acute or chronic metabolic acidosis (including diabetic ketoacidosis), and known hypersensitivity to Metformin.

Eligibility Group Restriction Status
Severe Renal Impairment (eGFR < 30 mL/min/1.73 m^2) Contraindicated
Metabolic Acidosis / DKA Contraindicated
Hypersensitivity to Metformin Contraindicated

Use is not recommended to initiate if kidney function is moderately impaired (eGFR 30 to 45 mL/minute/1.73 m^2), or in patients with hepatic impairment. The medication is approved for adults with Type 2 Diabetes Mellitus; however, the safety and effectiveness of the extended-release formulation have not been established for pediatric patients. Older adults require more frequent renal function assessment. Use during pregnancy is advised only if clearly needed. The drug is present in breast milk, requiring a decision to discontinue the drug or nursing. The drug must be temporarily discontinued for certain surgical and iodinated contrast imaging procedures in at-risk patients.

Advertisements

What should I know about interactions with other medicines?

Interactions with other medicines and products

Interactions with Cidophage Retard (Metformin Hydrochloride) are officially documented by regulatory authorities, largely focusing on effects that alter the drug's plasma concentration or increase the risk of lactic acidosis.

Formally Documented Contraindications and Restrictions

The medicine is subject to mandatory temporary discontinuation when procedures involving iodinated contrast agents are planned, as the interaction increases the risk of Metformin accumulation. Co-administration with excessive alcohol intake is formally contraindicated due to a significantly increased risk of lactic acidosis. This risk is also heightened and classified as a contraindication in patients with severe renal impairment.

Pharmacokinetic and Pharmacodynamic Interactions

Many documented interactions are transporter-mediated. Co-administration with inhibitors of OCT2 and MATE transporters (e.g., Cimetidine, Dolutegravir, Ranolazine) may significantly increase Metformin plasma concentrations due to reduced renal clearance. Conversely, substances with intrinsic hyperglycemic activity (e.g., Glucocorticoids, Thiazides) can reduce Metformin's overall efficacy by counteracting its blood glucose-lowering action.

Pharmacodynamic interactions exist with Insulin and Sulfonylureas, increasing the risk of hypoglycemia due to additive effects. The label also notes that taking the extended-release formulation with food increases its absorption.

Advertisements

Mechanism of Action

Cidophage Retard (Metformin Hydrochloride) exerts its action by modulating core cellular energy systems, resulting in the physiological consequence of reduced plasma glucose concentration. Its mechanism is defined by a primary cascade in the liver and a secondary effect on peripheral tissues, contributing to a systemic adjustment of metabolic homeostasis.


Molecular Initiation and Hepatic Pathway Modulation

The mechanism is initiated by the inhibition of Mitochondrial Complex I, which subtly shifts the liver cell's energy state. This change activates the central energy sensor enzyme, AMP-activated protein kinase (AMPK). The activated AMPK then suppresses the expression of key genes and enzymes within the Gluconeogenesis Pathway. This molecular cascade reduces the liver's endogenous glucose output, which is a primary physiological consequence of the mechanistic cascade.


Enhancing Peripheral Sensitivity and Sustained Action

Beyond the liver, the drug acts in peripheral tissues like skeletal muscle by promoting the movement of Glucose Transporter 4 (GLUT4) to the cell surface, enhancing insulin sensitivity. This action results in enhanced physiological glucose clearance. The extended-release (Retard) formulation is mechanistically relevant here, as it ensures sustained target modulation in the liver and peripheral tissues, leading to a consistent pattern of glucose disposal modulation.

Advertisements

Dosage and Administration Information

How to Use Cidophage Ret.

The administration of Cidophage Retard (Metformin Extended-Release) adheres to standardized, official guidelines, defining the route, schedule, and specific conditions for its intake. The medication is an oral tablet intended for long-term use, and its administration is highly dependent on its extended-release formulation.


Official Administration Guidelines

Instruction Official Guideline
Route of Administration Oral (by mouth).
Timing with Food Must be taken once daily with the evening meal.
Tablet Handling The tablet must be swallowed whole; it must not be split, crushed, or chewed.
Missed Dose If a dose is missed, skip the missed dose entirely and resume the next scheduled dose (do not take two doses at the same time).

Standard Dosing and Adjustments

The standard approach involves a cautious initiation and gradual adjustment. The starting dose is typically 500 mg once daily. The dose is adjusted through titration, meaning it may be increased in 500 mg increments no sooner than every one to two weeks, which allows for consistent monitoring. The maximum recommended daily dose for the extended-release form is 2000 mg.

Use of this medication is subject to constraints related to kidney function. Due to the potential for decreased renal function in older adults, renal function must be assessed more frequently in this population. Furthermore, the medication must be temporarily discontinued before and after certain radiologic studies involving the use of iodinated contrast materials.

Advertisements

Recent Clinical Evidence

Cidophage Ret.: Recent Clinical Evidence


Evidence for Use in Type 2 Diabetes Mellitus

The research foundation for this drug class involves large-scale Randomized Controlled Trials (RCTs) that evaluated the effect of its active ingredient on adults with Type 2 Diabetes. These studies primarily monitored changes in biomarkers such as Glycated Hemoglobin (HbA1c) and Fasting Plasma Glucose (FPG). Dedicated intermediate-term RCTs studied the extended-release (ER) formulation, reporting that its core biomarker changes aligned with patterns observed for the standard, immediate-release version. The understanding of long-term patient outcomes, such as the incidence of chronic complications, primarily relies on extrapolation from the established data of the broader drug class, as follow-up durations for ER-specific trials were often limited.


Evidence for Use in Polycystic Ovary Syndrome (PCOS)

Research also explored the use of the drug in women with Polycystic Ovary Syndrome (PCOS), a condition characterized by systemic imbalance. This evidence base consists of smaller RCTs and Systematic Reviews that monitored outcomes related to hormonal parameters and menstrual cycle regularity. Trials reported on the changes observed in these markers. However, findings were often mixed due to heterogeneity across studies. Research certainty remains low regarding sustained long-term effects, as sample sizes were modest and follow-up durations were typically short (less than one year).


Evidence in Special Populations and Research Uncertainty

Research evaluated the active ingredient for use in specific groups, including pediatric populations with T2DM, where studies monitored physiological parameters. Regulatory reviews have also defined appropriate use parameters for adults with moderately reduced kidney function (GFR 30–59 mL/min). Data for certain groups, such as the pregnant population, remain insufficient. Overall, comparative evidence is lacking for long-term head-to-head trials that compare the extended-release formulation to every newer drug class. Subgroup findings are often uncertain due to limited information.

Key Studies & References

  1. GLUCOPHAGE® XR (metformin hydrochloride) Extended-Release Tablets - Prescribing Information
  2. Metformin Treatment for Patients with Diabetes and Chronic Kidney Disease: A Korean Diabetes Association and Korean Society of Nephrology Consensus Statement
Advertisements

Frequently Asked Questions (FAQ)

Common questions about Cidophage Ret. (FAQ)


Q: How quickly does Cidophage Ret. start to make a difference?

Studies indicate that the active ingredient in Cidophage Ret. reaches its highest concentration in the blood within approximately 7 to 8 hours after taking the extended-release tablet. However, the full blood glucose-lowering effect may take up to 2 to 3 months to be fully observed.


Q: What happens if I stop taking Cidophage Ret. suddenly?

Stopping this medicine abruptly can lead to a potentially harmful increase in blood sugar levels, known as hyperglycemia. Elevated blood sugar over time can cause serious health complications related to diabetes. Official patient counseling information emphasizes that you should not discontinue any prescribed treatment without professional medical guidance.


Q: Is it normal to feel a bit tired when starting Cidophage Ret.?

According to official product information, mild tiredness or weakness is listed as a potential, less severe side effect. However, extreme tiredness is also listed as a potential symptom of the rare but serious metabolic complication called Lactic Acidosis. Patients should report any sudden or concerning fatigue to a healthcare professional for evaluation.


Q: Does Cidophage Ret. cause weight gain or weight loss?

Regulatory drug labels for medicines containing this active ingredient generally do not list weight gain as a primary adverse reaction. Official product information indicates that this ingredient does not usually cause weight gain.


Q: Are there any major diet restrictions when using Cidophage Ret.?

Official information advises patients to stick to their doctor-recommended dietary instructions. There is a specific contraindication against excessive alcohol intake due to the risk of Lactic Acidosis. Beyond this, the medication is intended to be used along with a diet and exercise program.


Q: Will Cidophage Ret. interact with common pain relievers like ibuprofen?

Clinical data shows that the concomitant use of the active ingredient with a single dose of ibuprofen resulted in no clinically significant change in the drug's concentration in the body. It is important to discuss all medications being taken with a healthcare provider.


Q: Does Cidophage Ret. have a risk of addiction?

Cidophage Ret. is classified by regulatory bodies as an antihyperglycemic agent (a Biguanide) used to manage high blood sugar. It is not listed as a controlled substance and is not associated with the potential for abuse or dependence in official product documents.


Q: How long does it take for Cidophage Ret. to fully leave the body?

The plasma elimination half-life of the active ingredient is approximately 17.6 hours in the blood in patients with normal kidney function. It typically takes about four to five half-lives, or roughly 4 days, for the majority of the drug to be cleared from the body.


Q: Does Cidophage Ret. affect sleep patterns?

The adverse reaction profile of medicines containing this active ingredient has occasionally listed side effects such as drowsiness and restless sleep or unusual sleepiness. Any changes in sleep patterns should be discussed with a healthcare provider.


Q: Does taking Cidophage Ret. mean I can stop using other treatments?

The official product information states that Cidophage Ret. is indicated as an adjunct (an addition) to diet and exercise for managing blood sugar. It is often used as part of a combination therapy, including with other diabetes medications. Patients are advised not to stop any prescribed treatment without professional medical guidance.


Q: Is Cidophage Ret. a new drug, or has it been around for a while?

The active compound within Cidophage Ret. (metformin hydrochloride) is a long-established and widely utilized medication class for the management of Type 2 diabetes. The specific 'Ret.' (extended-release) formulation is a newer delivery system designed for sustained action, but the core drug is well-researched.


Q: Can Cidophage Ret. cause changes in mood or behavior?

Official adverse event reports have rarely included side effects such as a change in behavior (sometimes described as similar to being drunk) and difficulty with concentrating. Such changes should be discussed with a healthcare provider for proper evaluation.


Q: What is the experience of patients who have used Cidophage Ret. long-term?

Regulatory documents advise that the response to this treatment is monitored by regular, periodic measurements of HbA1c (a long-term indicator of blood sugar control) and renal function over the full course of treatment. These established measurements help track the medication's effectiveness and safety over time.


Q: Are there any known interactions between Cidophage Ret. and birth control pills?

The official product information advises premenopausal females that taking this medication may lead to improvements in underlying health conditions, which could result in the resumption of ovulation. This information is provided to make patients aware of the potential for an unintended pregnancy.


Q: Can Cidophage Ret. cause changes to vision?

This medicine is not typically listed as a direct cause of changes to vision. However, complications from untreated or poorly controlled high blood sugar (the condition the drug treats) include various eye problems or changes/loss of vision. Patients with diabetes are routinely advised to have regular eye examinations.


Q: What are the official patient education resources for Cidophage Ret.?

Official drug labels direct patients to a Patient Information insert that accompanies the medication. This insert provides important details on the product's risks, benefits, diet, exercise, and a detailed description of the symptoms associated with serious adverse reactions.

Advertisements

How should Cidophage Ret. be stored and disposed of?

How to Store and Dispose of Cidophage Ret.

Storage Requirements

Cidophage Retard (Metformin Hydrochloride Extended-Release) must be stored at Controlled Room Temperature, defined as 20 to 25 C (68 to 77 F). Brief excursions between 15 to 30 C are permitted.

  • Protection: The container must be kept tightly closed to protect the tablets from moisture and should be stored away from excessive heat and humidity. The product must also be protected from light.
  • Safety: The medication must be kept out of the sight and reach of children.

Disposal Instructions

Unused or expired Cidophage Retard must be disposed of according to local regulations and pharmaceutical waste procedures. The product must not be thrown into wastewater or flushed down the toilet.

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

Available in countries:

Equivalent of Cidophage Ret. found in:

A-Z Index: