Sinerdol

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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.

Overview of Sinerdol

Property Description
Active ingredient Rifampicin (Rifampin)
Form Hard capsules (oral), Lyophilized powder (IV)
Pharmacological class Antibiotic, Antimycobacterial (Rifamycin group)
Origin Semisynthetic derivative
Action type Bactericidal

Sinerdol: Classification, Origin, and Purpose

Sinerdol is the brand name for the active pharmaceutical ingredient Rifampicin (also known as Rifampin), which is classified as a highly specialized semisynthetic antibiotic. Rifampicin belongs to the Rifamycin group of drugs, placing it within the larger Ansamycin class. This designation confirms its technical identity and chemical derivation.

This medicine's semisynthetic derivative origin defines its specialized role as a potent antimycobacterial agent, a type of antibiotic with highly targeted effectiveness. This classification is crucial for addressing certain severe, persistent bacterial infections, notably in the specialized treatment context of Tuberculosis (TB), where it is recognized for its essential contribution to mandatory multidrug treatment protocols.

Composition and Available Preparations

The core composition of Sinerdol centers on the active ingredient Rifampicin, a distinct red-brown crystalline powder with the molecular formula C43H58N4O12. While often utilized alongside other antimicrobial agents, Rifampicin is supplied as a single-ingredient product, differing from fixed-dose combination drugs that integrate multiple active agents.

The medicine is primarily designed for the oral route of administration and is typically supplied in the form of hard capsules. For specific clinical needs, an alternative preparation, a lyophilized powder for reconstitution into a solution, is available for the intravenous route, ensuring a consistent and reliable delivery method necessary for the required therapeutic duration. The formulation of Sinerdol as a capsule facilitates precise dosing within complex, long-term regimens.

General Therapeutic Role of Rifampicin

The general therapeutic role of Rifampicin is to rapidly eliminate susceptible bacterial pathogens through a swift, destructive mechanism known as a bactericidal action. It achieves this by selectively binding to and inhibiting the microbial enzyme DNA-dependent RNA polymerase (RNAP).

This mechanism of action is characterized by selective toxicity, preventing the bacteria from creating the necessary genetic products to reproduce without significantly affecting the mammalian enzyme. This powerful and specific inhibition positions Rifampicin as a critical antimicrobial agent, used to effectively reduce the microbial burden in serious systemic infections requiring specialized intervention, such as preventing meningitis in asymptomatic carriers of N. meningitidis.

Regulatory References

  1. U.S. National Library of Medicine
  2. MedlinePlus Drug Information

What side effects are possible with Sinerdol?

Possible Side Effects and Safety Information

Sinerdol, a combination medicine containing Rifampicin and Isoniazid, carries a significant risk profile, primarily concerning hepatotoxicity (liver damage) and neurotoxicity. Treatment requires strict medical supervision.

Serious and Clinically Significant Risks

Hepatotoxicity is the main serious risk, manifesting as severe and potentially fatal hepatitis, particularly associated with Isoniazid, and cholestatic reactions linked to Rifampicin. Patients over 35 years of age, those with pre-existing liver disease, or who consume alcohol regularly are at higher risk. Peripheral neuropathy (nerve damage, often causing numbness or tingling in the hands and feet) is a frequent adverse reaction; Pyridoxine (Vitamin B6) may be co-administered to help prevent this.

Other Adverse Reactions and Safety Notes

The most frequent common reactions observed include transient increases in liver enzymes (serum transaminases) and a reddish-orange discoloration of body fluids, including urine, saliva, sweat, and tears (often referred to as “red man syndrome”), which is usually harmless but can permanently stain soft contact lenses. Other possible reactions involve the nervous system (headaches, dizziness) and gastrointestinal tract (nausea, vomiting).

Safety Restrictions: Sinerdol is contraindicated in patients with active liver disease (including jaundice/liver failure) or porphyria. The Rifampicin component is a strong enzyme inducer, which can significantly reduce the effectiveness of many other medicines, including hormonal contraceptives, which must be replaced with non-hormonal methods during therapy. Close monitoring of liver function is mandatory.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory documents describe the manifestations of Sinerdol (Rifampicin) overdose by detailing unique physical signs and potential for severe systemic toxicity, which necessitates immediate action.

Documented Overdose Presentations

The most prominent sign of an overdose is a rapid, intense reddish-orange or brownish-red discoloration of the skin, urine, sweat, saliva, and tears. This is accompanied by severe gastrointestinal upset, including nausea, vomiting, and abdominal pain. Central nervous system effects are documented as progressive lethargy, confusion, and dizziness.

Severe Outcomes and Emergency Action

Overdose can lead to life-threatening complications involving major organ systems. Documented severe outcomes include acute liver failure, seizures, and coma, with potential for adverse cardiovascular events. Increased toxicity has been noted in cases involving pre-existing liver disease or alcohol abuse.

Immediate medical help must be sought in all cases of suspected overdose. Regulators state that emergency services must be contacted if the affected individual has collapsed, is having a seizure, or cannot be awakened.

Management and Antidote

There is no specific antidote known for Rifampicin overdose. Treatment mandated in official labeling is symptomatic and supportive, requiring prompt institution of intensive supportive measures, which may include procedures like gastric lavage and the administration of activated charcoal to mitigate further drug absorption.

Therapeutic Uses of Sinerdol

What Sinerdol Treats: Main Uses and Benefits

Sinerdol is relevant in the multidrug management of conditions characterized by systemic or localized discomfort, commonly used across conditions presenting with acute episodes. Its therapeutic use includes the treatment of active Tuberculosis (TB) and Leprosy, as well as chemoprophylaxis (reducing the risk of infection) for individuals exposed to diseases like meningococcal disease.

In clinical scenarios, the medication helps address debilitating symptoms related to systemic imbalance of active disease, such as persistent fever and chronic cough. The benefit contributes to the resolution of the infectious process and assists with maintaining functional stability.

“It is commonly used when symptoms intensify and supportive relief is needed.”

Sinerdol is also applied in addressing complex, persistent bacterial conditions, where its inclusion provides supportive relief when symptoms interfere with routine activities due to a heightened systemic burden. This use supports the patient during difficult episodes by easing the overall symptom load.


Quick Fact: Relief for Systemic Imbalance Sinerdol may assist with managing symptom clusters like fevers and night sweats by addressing the conditions where symptoms may intensify temporarily.

Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Sinerdol — Official Regulatory Information

Eligibility scope

Classification Population/Condition
Populations for whom use is allowed Adults and pediatric patients (generally over 3 months) for approved indications [FDA, SmPC].
Populations for whom use is not recommended Patients with severe liver disease or acute liver disease [SmPC, Mayo Clinic].
Populations for whom use is contraindicated Patients with a known hypersensitivity to any rifamycin [NIH DailyMed]. Patients concurrently receiving specific antivirals (e.g., saquinavir/ritonavir) or lurasidone [FDA Label].

Age-related eligibility rules:

  • Established use for adults and children over three months of age [SmPC].
  • Older adults require caution, particularly if signs of impaired liver function are present [SmPC].

Condition-specific eligibility rules:

  • Hepatic Impairment: Use is restricted and requires careful monitoring (e.g., weekly enzyme testing) due to hepatotoxicity risk [SmPC, NIH DailyMed]. A specific dose limit (e.g., 8 mg/kg daily) may apply [MSF].
  • Renal Impairment: No dosage adjustment is required for doses up to 600 mg daily; however, half-life is increased in anuric patients [FDA Label].
  • Comorbidities: Caution is required in patients with a history of alcohol abuse or porphyria [SmPC, MedlinePlus].

Pregnancy and lactation eligibility status (if explicitly documented):

  • Pregnancy: Use is generally not recommended unless essential, as the drug crosses the placenta and has been associated with an increased risk of bleeding tendencies in mothers and neonates [WHO, UKTIS].
  • Lactation: Rifampicin is excreted into breast milk, but the low levels are generally classified as compatible with breastfeeding by health authorities (e.g., CDC).

Eligibility-context constraints (as defined in official documents):

  • Pre-treatment measurement of liver function is required for all patients with pre-existing liver conditions [SmPC].

Connection to the overall eligibility profile:

Official regulatory documents define non-eligibility through absolute contraindications based on hypersensitivity and specific concurrent drug use. Eligibility for all other populations is conditional, with mandatory restrictions and close hepatic monitoring applied to patients with existing liver disease or other high-risk comorbidities.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Sinerdol's (Rifampicin) interaction profile is defined by its role as a potent inducer of certain drug-metabolizing CYP450 enzymes (including CYP3A4 and CYP2C9) and the transporter P-glycoprotein. This strong induction accelerates the metabolism and clearance of many co-administered medicines, resulting in a significant decrease in their plasma concentration and therapeutic efficacy, as documented in regulatory labeling.


Interaction Classifications and Restrictions

Contraindicated Combinations: Co-administration with certain drugs is explicitly prohibited. Formal regulatory contraindications include combinations with Lurasidone, the Saquinavir / Ritonavir combination, Voriconazole, and specific Hepatitis C Agents (such as Ledipasvir, Sofosbuvir, and Daclatasvir).

Exposure Reduction: The induction effect commonly leads to a loss of efficacy for sensitive substrates. This outcome is documented for drugs like oral hormonal contraceptives (risk of contraceptive failure), anticoagulants (reduced effect), and various immunosuppressants and antivirals.

Timing Rule: A specific pharmacokinetic interaction with Para-aminosalicylic acid (PAS) requires that the two agents be administered not less than eight hours apart to ensure adequate Sinerdol blood levels. Food intake can reduce Sinerdol absorption, leading to a recommendation for empty stomach administration.

Toxicity Risk: Regulatory information states an increased risk of hepatotoxicity when Sinerdol is combined with agents such as Isoniazid or Alcohol.

Mechanism of Action

Sinerdol (Rifampicin) exerts its action through a highly specific, enzyme-mediated mechanism that is classified as bactericidal. This effect is achieved by disrupting the core machinery responsible for the pathogen's survival and replication.

Targeted Inhibition of Bacterial RNA Polymerase

This mechanism targets the essential bacterial DNA-dependent RNA Polymerase (RNAP) enzyme. Sinerdol binds with high, irreversible affinity to the enzyme's beta-subunit. This specific, localized interaction immediately initiates a selective inhibitory effect, which is the foundational molecular step that determines the resulting bactericidal action.

Causal Cascade: Arresting Gene Expression

The binding initiates a cascade that results in steric hindrance (a physical blockade) that prevents the RNAP enzyme from completing transcription initiation. This total and swift failure of RNA synthesis causes the rapid cessation of all essential bacterial protein production, leading directly to the destruction of the microbial cell and subsequent reduction of viable microbial load.

️ Mechanism Constrained by Target Mutation

The mechanism's functional constraints are related to the structure of the beta-subunit; a single-point mutation in the rpoB gene can alter the binding pocket. This structural change compromises the drug's affinity, which causes the inhibition mechanism to fail, resulting in a loss of the bactericidal action against resistant microbial populations.

Dosage and Administration Information

How to Use Sinerdol

Sinerdol (Rifampicin) is used according to clinical guidelines to ensure proper administration and adherence to established regimens.

Administration and Dosage

Sinerdol is used via two primary routes and is available in specific strengths:

Route Dosage Form Standard Adult Daily Dose (TB)
Oral (PO) Hard Capsules (150 mg, 300 mg) 10 mg/kg body weight (Max 600 mg/day)
Intravenous (IV) Lyophilized Powder (600 mg) 10 mg/kg body weight (Max 600 mg/day)

For most specialized infections, Sinerdol is administered once daily as part of a multidrug regimen. For prophylaxis (e.g., meningococcal carriers), the recommended adult dose is 600 mg taken twice daily for a short course of two days.


Essential Administration Requirements

Adherence to the following instructions is indicated to optimize absorption and treatment structure:

  • Oral Timing: Sinerdol capsules are taken on an empty stomach—defined as 1 hour before or 2 hours after a meal.
  • Combination Principle: The medicine is almost always required to be used in conjunction with at least one other appropriate antibiotic to prevent the development of bacterial resistance.
  • IV Delivery: The intravenous form is administered as a slow infusion over a period ranging from 30 minutes to 3 hours.
  • Dosing Adjustments: For patients with impaired liver function, the dose typically should not exceed 8 mg/kg of body weight per day. No adjustment is generally needed for daily doses less than or equal to 600 mg in renal impairment.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Sinerdol (Rifampicin)

Evidence for Use in Tuberculosis (TB)

The research base for Sinerdol's role in managing active Tuberculosis (TB) is extensive, consisting primarily of numerous Randomized Controlled Trials (RCTs) and supporting Systematic Reviews. These studies were used in research exploring how to achieve bacterial clearance and observe it over time, particularly when Sinerdol is used as a core drug in a multi-agent regimen. Research has also explored regimens involving doses higher than the standard amount to see if this affects the rate of bacterial clearance. Findings describe patterns related to the elimination of the bacteria from observed populations when Sinerdol is included in the full course of treatment.

Evidence for Use in Leprosy

The role of Sinerdol in managing Leprosy has been evaluated through global Clinical Trials and large Observational Cohort Studies, which describe its inclusion as a core component of a multi-drug therapy (MDT). Research has focused on outcomes related to disease progression, such as the reduction of the bacterial index (BI) in patient samples and the frequency of relapse after treatment is complete. Studies report that when Sinerdol is used in the multi-drug therapy, findings describe patterns of low disease recurrence.

Evidence for Use in Chemoprophylaxis

Sinerdol was studied for use in chemoprophylaxis, or prevention, for individuals who have been in close contact with people diagnosed with certain conditions like meningococcal disease. The research explored short-term symptom changes by examining how quickly the drug could achieve the clearance of the bacteria from the nasal passages of asymptomatic carriers. Studies report the clearance of the bacteria from the nasal passages following administration of the prophylactic regimen.

What is Still Uncertain About Sinerdol Research

Despite being an established agent, research is ongoing in several critical areas. Evidence quality varies across studies concerning the optimal dosing for achieving studied outcomes, particularly in the context of TB. The data show patterns related to high variability in how the body processes the drug, which is not fully understood. There is also uncertainty regarding the long-term effects of the single-dose chemoprophylaxis on transmission dynamics and the selection of resistant bacterial strains.

Key Studies & References

  1. WHO consolidated guidelines on tuberculosis: Module 4: Treatment - Drug-resistant tuberculosis treatment, 2022 update

Frequently Asked Questions (FAQ)

Common questions about Sinerdol (FAQ)


Q: What is the typical duration of treatment with Sinerdol?

Official medical guidelines define the standard duration of treatment using Sinerdol for pulmonary Tuberculosis. The regimen generally requires a total duration of six months, divided into an initial intensive phase and a continuation phase. The overall course of therapy is determined by a healthcare professional based on the specific infection being addressed.


Q: What does the research say about the long-term safety profile of Sinerdol?

Research has examined the safety profile of Sinerdol over long treatment periods. While various studies have been conducted, official documents indicate that limited data are available specifically regarding the chronic, long-term adverse effects of the drug. The safety profile, including long-term effects, remains a subject of continued study.


Q: Is Sinerdol suitable for older adults (seniors)?

Official information notes that studies conducted to date have not shown specific problems related to older age that would limit Sinerdol's usefulness. However, caution is necessary in populations where liver function may be impaired, as this is a major safety consideration for the medicine.


Q: If I have a history of [common chronic condition], can I use Sinerdol?

Eligibility to use Sinerdol is conditional upon a patient's medical history. Official prescribing information states that the medicine is contraindicated or requires caution if there are pre-existing conditions involving active liver disease or porphyria. Other conditions related to blood clotting are noted in official documents as factors requiring assessment.


Q: Is Sinerdol the same type of medicine as [similar drug name]?

Sinerdol's active ingredient is classified as a specialized antibiotic. It belongs to the rifamycin derivatives drug class, which is a group of medicines with similar chemical structures and mechanisms of action. This classification helps define its relationship to other antibiotics in the same class.


Q: How long does it typically take to feel the effects of Sinerdol?

Official pharmacokinetic data indicates how quickly the medicine reaches its highest concentration in the bloodstream. Peak concentration levels typically occur about 2 hours after the oral dose is administered on an empty stomach. This rapid absorption is an important feature of the medicine's profile.


Q: Is Sinerdol a narcotic or habit-forming drug?

Regulatory authorities classify Sinerdol's active ingredient under the Controlled Substances Act (CSA) schedule. According to this official classification, Sinerdol is not considered a controlled drug and is not habit-forming.


Q: Can I take Sinerdol if I drink coffee every day?

Patient information from official sources indicates that Sinerdol can generally be taken with common beverages, including coffee or tea. The main instruction relates to taking it on an empty stomach, which means following specific timing relative to meals.


Q: What happens if I accidentally miss a dose of Sinerdol?

Regulatory instructions address how to handle a missed dose. Official information states that a missed dose may be taken as soon as it is remembered. However, if it is almost time for the next scheduled dose, the missed dose should be skipped. Regulatory instructions state that patients should not take double or extra doses to compensate for a missed dose.


Q: Is there a generic version of Sinerdol available yet?

Official drug records indicate that a generic version of the intravenous injection formulation of Sinerdol's active ingredient is approved and available. However, there is no generic formulation of the oral capsule product available at this time.


Q: Is it normal to feel a little dizzy when starting Sinerdol?

Regulatory safety information lists dizziness as a potential adverse effect of Sinerdol. The listing indicates that dizziness is a potential adverse reaction that has been reported during the use of the medicine.


Q: Does Sinerdol affect sleep or cause insomnia?

Official documents note that central nervous system effects such as drowsiness have been recorded. While insomnia itself is not listed as a widely reported side effect, it is a symptom that official information indicates may require further discussion with a healthcare provider if it persists during treatment.


Q: What are the most common side effects listed for Sinerdol?

The most common adverse reactions reported in official drug documents include gastrointestinal issues like nausea, vomiting, diarrhea, and upset stomach. Another frequent and notable reaction is the red-orange discoloration of body fluids, which can affect urine, sweat, saliva, and tears.


Q: Can Sinerdol be taken with common over-the-counter pain relievers?

The active ingredient in Sinerdol is a powerful enzyme inducer, which can affect the metabolism of many other medicines. Official interaction summaries note that the metabolism of common pain relievers like Ibuprofen may be increased when combined with Sinerdol. This potential interaction is a descriptive risk factor that may result in reduced concentrations of the pain reliever in the body.


Q: Are there any specific foods or supplements I should avoid with Sinerdol?

Regulatory documents caution against the use of alcohol while using Sinerdol because this combination carries an increased risk of liver damage. No specific foods are listed for avoidance, but the medicine should be taken on an empty stomach for proper absorption.


Q: Is Sinerdol approved for use in children or teenagers?

Sinerdol is approved for use in pediatric populations for the approved indications. Official documents state that general use is established for children over 3 months of age. Clinical studies have been conducted on children and infants within this age range.


Q: Is Sinerdol a long-term treatment or is it usually temporary?

Sinerdol is used for both long-term and short-term purposes, depending on the condition being addressed. It is prescribed for several months as part of the regimen for certain serious infections. It can also be used for a short, temporary course for preventive measures (chemoprophylaxis).


Q: Can Sinerdol cause issues with liver function?

Yes, official documents state that Hepatotoxicity, or liver damage, is a known and serious risk associated with Sinerdol. Close monitoring of liver function is often required throughout the course of treatment due to this known risk.


Q: How quickly does Sinerdol leave your system after you stop taking it?

Pharmacokinetic data from official documents describes how quickly the drug is processed and eliminated by the body. The mean biological half-life in the bloodstream is approximately 2 to 3 hours with repeated administration. The half-life refers to the time it takes for the amount of drug in the body to be reduced by half.


Q: What is the purpose of the 'inactive ingredients' in Sinerdol tablets?

Sinerdol tablets contain an active ingredient plus several inactive ingredients, which are listed in regulatory documents. These ingredients, such as colloidal silicon dioxide and corn starch, are essential to the product's formulation. They are included to help stabilize the medicine, ensure correct size and shape, or aid in proper absorption.


Q: Are there different strengths of Sinerdol available?

Yes, Sinerdol is available in different strengths and forms to suit various administration needs. The oral capsules are supplied in 150 mg and 300 mg strengths. A different preparation is also available as a lyophilized powder for intravenous administration.


Q: What is the earliest a person can be eligible to use Sinerdol?

According to official regulatory documents, the medicine is generally approved for use in pediatric patients starting at over 3 months of age. This establishes the earliest age a person can typically be considered eligible for treatment with Sinerdol for approved uses.


Q: Do studies show that Sinerdol is more effective for men or women?

Research examining Sinerdol's effects on different patient populations has generally found limited data available for relevant differences in treatment outcomes based on sex. While some studies observed that women may have higher exposure to the drug in their bloodstream, patient sex was not identified as a risk factor for treatment failure in certain clinical trials.


Q: What is the meaning of the [technical term] used to describe how Sinerdol works?

The medicine's mechanism is described using specialized terminology in official documents. For example, Sinerdol is defined as a semisynthetic antibiotic, meaning it is derived partially from a natural substance. It is also classified as belonging to the rifamycin group of drugs.


Q: Is Sinerdol covered by the World Health Organization's list of essential medicines?

Yes, the active ingredient in Sinerdol is included on the World Health Organization's Essential Medicines List (EML). This designation confirms its role as a key public health drug, essential for the treatment of diseases like Tuberculosis and Leprosy globally.


Q: Is it OK to take Sinerdol before driving or operating machinery?

Official safety information lists certain nervous system side effects such as dizziness and confusion. Since these reactions are possible, official information suggests they may be a factor in the ability to drive or operate machinery.


Q: Is it common for people to stop taking Sinerdol due to side effects?

Studies have looked into the reasons why some patients may discontinue the medicine during treatment. Official documents indicate that severe adverse reactions, such as specific blood disorders or elevated liver markers, are defined as appropriate reasons for discontinuation.


Q: Is it normal to have [vague non-serious symptom] when first starting Sinerdol?

Official safety information lists several common symptoms that may occur, particularly when a person first starts taking Sinerdol. These frequently reported reactions include nausea, vomiting, diarrhea, and headache.

How should Sinerdol be stored and disposed of?

How to Store and Dispose of Sinerdol?

The storage and disposal instructions for Sinerdol (Rifampicin) are mandated by official regulatory documents to ensure product stability and safety.

Required Storage Conditions

Condition Requirement
Temperature Store at a temperature not exceeding 25 °C.
Protection Keep in the original container and protect from light and moisture.
Child Safety Must be stored out of the sight and reach of children.

The container must be kept tightly closed when not in use. For the intravenous form, the reconstituted solution is stable for only 24 hours when stored below 25 °C or refrigerated.

Disposal

Unused medicinal product or waste material must be disposed of according to local requirements. The medicine must not be disposed of via wastewater or household trash.

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

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