Co-Almacin

Quick links to important sections

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 Co-Almacin

Quick Facts

Property Description
Active ingredient Amoxicillin and Clavulanic acid
Form Tablet, Suspension (oral), Powder for injection/infusion
Pharmacological class beta-Lactam Antibacterial Drug / beta-Lactamase Inhibitor Combination
Common use Systemic treatment of bacterial infections
Origin Semi-synthetic (Amoxicillin) and Synthetic/Fermentation-derived (Clavulanic acid)

What is Co-Almacin and its Pharmacological Type?

Co-Almacin is the trade name for the Co-Amoxiclav (Amoxicillin/Clavulanic acid) Fixed-Dose Combination (FDC) product. It is classified as an antibacterial drug belonging to the Penicillin group of beta-Lactam antibiotics, a class clinically recognized for its efficacy in disrupting bacterial cell wall synthesis. This specific combination is widely recognized, with popular equivalent formulations marketed under brands such as Augmentin and Clavamox. The medicine is a semi-synthetic entity providing systemic treatment and is listed on the World Health Organization's (WHO) Model List of Essential Medicines recognizing its importance in treating priority bacterial challenges. Co-Almacin is formulated for both oral administration, typically as tablets and oral suspension forms, and for intravenous use as a sterile powder for injection/infusion.

Composition and the Role of Active Ingredients

The unique utility of Co-Almacin is derived from its two synergistic active ingredients: Amoxicillin and Clavulanic acid. Amoxicillin, the semi-synthetic penicillin derivative, executes the primary bactericidal action. Clavulanic acid, which is structurally related to penicillins but has negligible antibacterial activity, functions as a potent beta-Lactamase inhibitor. The inclusion of this second component is a differentiating factor that positions Co-Almacin to counter widespread bacterial resistance mechanisms.

General Purpose: Why is Co-Almacin a Combination Drug?

The primary purpose of Co-Almacin is to achieve a more reliable and extensive therapeutic effect against various bacterial infections by overcoming antimicrobial resistance. Clavulanic acid acts as an enzyme shield, neutralizing the bacterial beta-Lactamase enzymes that would otherwise inactivate the Amoxicillin component. This strategic combination creates a profound synergistic effect that restores Amoxicillin’s efficacy, ensuring its ability to destroy target organisms and significantly extending the preparation's range of effectively susceptible bacteria.

Regulatory References

  1. Amoxicillin Clavulanate - StatPearls
  2. Amoxicillin + clavulanic acid - eEML

What side effects are possible with Co-Almacin?

Co-Almacin, a fluoroquinolone antibiotic, carries warnings regarding a range of potential adverse effects, including some that are classified by regulatory agencies as serious, disabling, and potentially permanent.

Serious and Potentially Permanent Side Effects

The most significant safety concerns involve the musculoskeletal and nervous systems, with reported effects that can last for months or years. These serious adverse reactions may occur within hours to weeks after starting the medicine, or even several months after stopping it. They often affect multiple body systems simultaneously.

  • Musculoskeletal: Tendinitis, tendon rupture (most commonly Achilles tendon), muscle pain, muscle weakness, joint pain, and joint swelling.
  • Nervous System: Peripheral neuropathy (nerve damage, often felt as burning pain, tingling, numbness, or weakness in the arms or legs), memory impairment, confusion, and sleep disorders (insomnia).
  • Psychiatric/Mental Health: Anxiety, depression, agitation, delirium, and hallucinations.
  • Other Serious Risks: Severe drops in blood sugar (hypoglycemia, potentially leading to coma), worsening of myasthenia gravis symptoms, and prolongation of the QT interval (a heart rhythm concern).

Common Side Effects

The most commonly reported side effects across the drug class typically include nausea, diarrhea, headache, dizziness, and trouble sleeping.

Safety Considerations and Restrictions

Specific patient populations have an increased risk for certain adverse effects, particularly tendon injury. These include individuals over 60 years of age, those with kidney disease, and patients who have received an organ transplant. The risk of tendon damage is also heightened when the medicine is used concomitantly with systemic corticosteroids. The medicine should generally not be used in individuals who have experienced serious side effects with a quinolone or fluoroquinolone in the past.

Overdose and Emergency Response

Overdose Map: Overdose and when to seek help — Official Regulatory Information for Co-Almacin

Property Official Regulatory Statement
Documented overdose presentations Gastrointestinal upset, including vomiting, abdominal pain, and diarrhea. Signs of central nervous system excitation, including convulsions (seizures).
Physiological systems affected Gastrointestinal system, central nervous system, and renal system (kidneys).
Emergency-response statements Patients must seek immediate emergency medical attention upon suspicion of overdose.

Official Overdose Statements

Overdose exposure may lead to gastrointestinal irritation and, in severe cases, convulsions (seizures). The risk of convulsions is specifically higher in individuals with impaired renal function or those receiving high doses. High concentrations of the drug can result in crystalluria (crystals in the urine), which may progress to acute renal failure, posing a potential for severe outcomes.

The required emergency action is to seek immediate medical attention and contact a poison control center. Regulatory documents state that no specific antidote is known. Management is therefore symptomatic and supportive. Procedures such as hemodialysis are documented to be effective for removing the active components. Close hospital monitoring is necessary, focusing on the patient's fluid and electrolyte balance and assessment of renal function.

Therapeutic Uses of Co-Almacin

Main Uses of Co-Almacin

Co-Almacin is a combination antibiotic used to treat various bacterial infections. It contains two active ingredients: amoxicillin, a penicillin-type antibiotic, and clavulanic acid, a beta-lactamase inhibitor. This combination is effective against a wider range of bacteria than amoxicillin alone.

Respiratory Tract Infections

The medication is frequently prescribed for infections affecting the upper and lower respiratory systems. These include:

  • Sinusitis: Inflammation or infection of the nasal sinuses.
  • Otitis Media: Infections of the middle ear.
  • Tonsillitis and Pharyngitis: Bacterial infections of the throat and tonsils.
  • Bronchitis: Infection of the bronchial tubes leading to the lungs.
  • Pneumonia: Bacterial infection of the lung tissue.

Urinary Tract Infections

Co-Almacin is used to treat infections within the urinary system, such as:

  • Cystitis: Inflammation of the bladder.
  • Urethritis: Infection of the urethra.
  • Pyelonephritis: Bacterial infection of the kidneys.

Skin and Soft Tissue Infections

This antibiotic is effective for treating bacterial skin conditions, including:

  • Cellulitis: A deep bacterial skin infection.
  • Abscesses: Collections of pus caused by infection.
  • Wound Infections: Treatment of infected bites or surgical sites.

Dental Infections

In dentistry, Co-Almacin may be used to manage severe dental abscesses or spreading infections associated with the teeth and gums.

Benefits of the Combination Therapy

Overcoming Bacterial Resistance

Many bacteria produce enzymes called beta-lactamases, which can deactivate standard penicillin antibiotics. The clavulanic acid component in Co-Almacin blocks these enzymes, allowing the amoxicillin to effectively eliminate the bacteria.

Broad-Spectrum Activity

By combining these two components, the medication provides a broad spectrum of activity. It is capable of targeting both Gram-positive and Gram-negative bacteria, making it a versatile option for mixed infections or cases where the specific bacteria have developed resistance to simpler antibiotics.

Regulatory References

  1. NIH StatPearls medical overview

Eligibility and Restrictions for Use

The eligibility for using Co-Almacin (Amoxicillin/Clavulanic acid) is strictly defined by regulatory documents, focusing on patient history, age, and pre-existing conditions.

Eligibility Scope: Official Regulatory Information

Scope Regulatory Statement
Populations for whom use is contraindicated Patients with a history of serious immediate hypersensitivity to amoxicillin, any penicillin, or other beta-lactam agents are prohibited from use. Use is also contraindicated for individuals with a previous history of cholestatic jaundice or hepatic dysfunction associated with prior Co-Almacin therapy.
Populations for whom use is not recommended Use should be avoided in patients with suspected infectious mononucleosis due to the high risk of a non-allergic rash. Certain oral suspensions containing aspartame are contraindicated for those with Phenylketonuria (PKU).
Age-related eligibility rules Use is generally established for adults and for children ge3 months of age, but specific lower-ratio formulations are required for infants and those weighing less than 40 kg. The extended-release tablet is not established for use in children under 16 years.
Condition-specific restrictions Patients with severe renal impairment (creatinine clearance lt30 mL/min) are prohibited from using the highest-strength tablet formulations. Caution is required, and monitoring is recommended, for patients with current hepatic impairment.
Pregnancy and lactation eligibility Use during pregnancy is restricted to when it is clearly needed. Use while nursing requires caution, as the active substances are excreted into breast milk.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile for Co-Almacin (Amoxicillin/Clavulanic acid) outlines specific documented effects with other medicinal products, substances, and diagnostic tests. This information is derived strictly from official regulatory labeling.

Drug-Drug Interactions

Interacting Substance Official Regulatory Description Restriction
Probenecid Decreases the renal tubular secretion of amoxicillin, resulting in increased and prolonged blood levels of the drug. Concomitant use is not recommended.
Oral Anticoagulants Co-administration may increase the prolongation of prothrombin time (INR). Requires appropriate monitoring.
Methotrexate Penicillins may reduce the excretion of Methotrexate, creating a potential for increased toxicity. Documented exposure change.
Mycophenolate Mofetil Associated with a reduction of approximately 50% in the pre-dose concentration of the active metabolite (MPA). Documented exposure change.
Allopurinol Co-administration is linked to an increased risk of allergic skin reactions. Documented pharmacodynamic risk.
Oral Contraceptives May be associated with a documented reduction in the efficacy of estrogen/progestin contraceptives. Documented efficacy risk.

Administration and Other Constraints

  • Oral formulations are optimally administered at the start of a standardized meal for optimal absorption and to reduce gastrointestinal intolerance.
  • The extended-release formulation is not recommended with a high-fat meal as it decreases clavulanate absorption.
  • The medicine is contraindicated in patients with a prior history of cholestatic jaundice or hepatic dysfunction associated with Amoxicillin/Clavulanate treatment.
  • Amoxicillin can cause false-positive reactions in non-enzymatic urine glucose tests and may cause a false positive Coombs test.

Mechanism of Action

Irreversible Disruption of Bacterial Structural Integrity

The beta-Lactam component, Amoxicillin, acts by binding irreversibly to Penicillin-Binding Proteins (PBPs), the bacterial enzymes critical for building the cell wall's rigid peptidoglycan layer, a mechanistic action classified as bactericidal. This inhibition of the cross-linking process causes the bacterial cell wall to lose its structural integrity and osmotic defense, leading directly to the rupture and death of the bacterial cell (bacteriolysis).


️ Clavulanic Acid’s Role in Overcoming Enzyme Resistance

The combination’s strength is derived from Clavulanic acid, a compound that primarily targets the bacterial defense system rather than the cell wall itself. Clavulanic acid acts as a mechanism-based inhibitor that permanently neutralizes beta-Lactamase enzymes, which are secreted by resistant bacteria to chemically destroy Amoxicillin. By eliminating this defense mechanism, Clavulanic acid allows Amoxicillin to reach and inhibit PBPs, which broadens the range of susceptible bacterial resistance mechanisms.

Dosage and Administration Information

Co-Almacin (Amoxicillin/Clavulanic acid) is administered via two primary, officially approved routes: orally for general use as tablets or reconstituted suspension, and intravenously (IV) for initial therapy in more severe conditions or for surgical prophylaxis.

The most common adult oral dosing involves administering the combination either twice daily (every 12 hours) or three times daily (every 8 hours), depending on the specific strength selected. For severe infections, the standard oral dose is 875 mg/125 mg taken every 12 hours. Oral doses must be administered at the start of a meal to enhance the absorption of the clavulanate component and minimize potential gastrointestinal intolerance.

Dosing for children under 40 kg is based on body weight (mg/kg/day) and typically divided into two or three daily administrations. It is a procedural rule that different tablet strengths, due to varying drug ratios, are not substitutable for each other.

Patients with significant renal impairment require mandatory dosage frequency adjustments based on kidney function (CrCl). For severe impairment (CrCl < 30 mL/min), the dose frequency is reduced to every 12 or 24 hours, and the high-strength 875 mg/125 mg tablet is generally avoided. The duration of therapy typically ranges from 7 to 14 days, and should not exceed 14 days without clinical re-evaluation.

Recent Clinical Evidence

Research Evidence / Overview of studies for Co-Almacin

The information presented here describes the research that has been conducted on Co-Almacin (Amoxicillin/Clavulanic acid), focusing on the types of studies, what was measured, and what remains unknown. It is not intended to provide personal medical advice, instruction on use, or information regarding side effects or dosing.


Evidence for use in Respiratory and Ear, Nose, and Throat Infections

Research explored this combination's use in conditions such as acute otitis media and acute bacterial sinusitis, which are often characterized by symptoms like fever and discomfort. Researchers utilized Randomized Controlled Trials (RCTs) to observe short-term symptom changes and evaluate outcomes against comparator arms. Studies focused on outcomes related to physical discomfort and monitored how symptoms evolved in the observed populations over defined, short time intervals.

Findings describe patterns observed in these studies, which often focused on whether measured clinical assessments changed within the follow-up period. What remains uncertain is that data for comparison against similar treatments is limited for some areas, and evidence quality varies across studies.


Evidence for use in Lower Respiratory and Severe Systemic Infections

This combination was evaluated in trials exploring Community-Acquired Pneumonia (CAP) in adults and older adults. Research examined outcomes monitoring physiological strain or stress, which included tracking 30-day readmission and overall clinical deterioration rates. Findings indicate soft, non-causal patterns related to measured clinical success when compared against alternative regimens, which helps contextualize therapeutic options.

Certainty remains low regarding the consistency of results when comparing the combination to every single alternative agent. Furthermore, reliance on older trials means evidence quality varies across studies and the long-term effects are not fully established beyond the intermediate follow-up periods.


Research Gaps and Areas of Uncertainty

Research has explored this combination's use in pediatric populations and older adult patients, but data for comparison remains limited for pregnant populations or patients with severe pre-existing health statuses. Follow-up durations were limited for many indications. No research provides absolute certainty; the findings describe group patterns, not personal outcomes. Evidence highlights what is known — and what is still uncertain.

Key Studies & References

  1. Amoxicillin + clavulanic acid - eEML - Electronic Essential Medicines List (WHO)
  2. Clinical Practice Guidelines: Animal and human bites - The Royal Children's Hospital

Frequently Asked Questions (FAQ)

Common questions about Co-Almacin (FAQ)


Q: Can Co-Almacin cause me to feel sleepy or tired?

A: Official prescribing information generally does not list drowsiness among the most frequent side effects. However, the regulatory documentation does include Central Nervous System (CNS) effects in the overall adverse reaction profile. Reports of drowsiness are typically noted in discussions related to accidental overdose, not necessarily typical use.

Q: What happens if I forget to take my Co-Almacin dose?

A: Official guidance usually describes a protocol for a missed dose, which often involves taking it as soon as it is remembered. Regulatory documents indicate that if it is nearly time for the next scheduled dose, the protocol is typically to skip the missed dose and proceed with the normal schedule, generally advising against taking a double dose.

Q: How long can I safely use Co-Almacin?

A: Regulatory documents describe the typical treatment duration as ranging from 7 to 14 days. The official product information advises that treatment generally does not exceed 14 days without clinical re-evaluation.

Q: Why does Co-Almacin come in different colors/shapes?

A: According to official product information, different colors, shapes, and markings are used to distinguish the drug’s various strengths and formulations. This distinction is important because different dosage forms and ratios of the active ingredients are not substitutable for one another.

Q: Does Co-Almacin have a 'half-life' I should be aware of?

A: Pharmacokinetic data in official documentation describes the drug’s half-life, which is the time it takes for half of the drug to be eliminated from the body. The half-life for the amoxicillin component is about 1.3 hours, and for the clavulanic acid component, it is about 1.0 hour.

Q: Can children take Co-Almacin, or is it only for adults?

A: Regulatory documents confirm that Co-Almacin is officially established for use in both adults and pediatric patients. Generally, this includes children 3 months of age and older. Specific dosing and formulations are required for infants and children weighing less than 40 kg.

Q: Are there any known severe or rare side effects for Co-Almacin?

A: Yes, official labeling highlights several potential severe and rare adverse effects. These include serious hypersensitivity (allergic) reactions, severe cutaneous adverse reactions (SCAR), and reports of hepatic dysfunction or cholestatic jaundice.

Q: Does taking Co-Almacin affect my ability to drive or operate machinery?

A: Official product information notes that the medicine can cause side effects such as dizziness or CNS (central nervous system) effects. These effects could potentially impact a person's ability to drive or safely operate complex machinery.

Q: Can I stop taking Co-Almacin suddenly, or do I need to taper off?

A: Official documentation notes that completing the full prescribed course of therapy is generally emphasized to help ensure the infection is fully treated and to potentially limit the development of drug-resistant bacteria. The regulatory information does not specify a tapering process for discontinuation.

Q: Does Co-Almacin interact with over-the-counter cold medicines?

A: Official documentation provides detailed tables of known prescription drug-drug interactions. Patient-facing documentation often recommends informing a healthcare provider of all medicines being taken to check for potential documented or theoretical interactions, as official lists focus primarily on prescription drug interactions.

Q: What if I take too much Co-Almacin by accident?

A: If too much is taken, common reported effects in official documents may include stomach pain, diarrhea, nausea, and vomiting. Official guidance consistently directs patients to seek immediate medical attention or contact a Poison Control Center in cases of suspected overdose.

Q: Why do some people need a higher dose of Co-Almacin than others?

A: Regulatory dosing guidelines are designed to account for specific patient and disease characteristics. Variations in the prescribed dose are officially determined by factors such as the severity and type of infection, the patient’s body weight (in children), and the degree of kidney function (renal impairment).

Q: Is there a limit on how much Co-Almacin I can take in a day?

A: Yes, official regulatory documents, such as the prescribing information, define the maximum recommended total daily dose. This limit is expressed in terms of the amoxicillin component and depends on the specific product strength prescribed and the patient’s characteristics.

Q: Does Co-Almacin interact with grapefruit juice?

A: Specific food-drug interaction tables in official regulatory documents do not typically list an interaction with grapefruit juice for this medicine. Patient information often includes a general recommendation to inform a healthcare provider of all foods and beverages consumed.

Q: If I am taking Co-Almacin, do I need to avoid sun exposure?

A: Photosensitivity, which is an increased sensitivity to sunlight, is not listed as a common or specific adverse reaction in the official product information for Co-Almacin, unlike certain other antibiotic classes. Official warnings should be consulted for complete information.

Q: I saw a news article about Co-Almacin; is there an official recall or safety warning?

A: Authoritative drug agencies, such as the FDA and the EMA, maintain public databases and official channels dedicated to communicating any potential safety warnings, recalls, or updates regarding all medicines. The public can check these official sources for current information on the drug's regulatory status.

Q: Does Co-Almacin affect my mood or mental state?

A: Official adverse reaction reports for this medicine sometimes include Central Nervous System (CNS) effects. These can potentially influence mood or mental state, with effects such as agitation, anxiety, insomnia, or confusion being listed in regulatory documents as uncommon or rare events.

Q: Can people with diabetes use Co-Almacin?

A: Official prescribing information contains warnings that the amoxicillin component has the potential to interfere with certain non-enzymatic urine glucose tests. This potential interference with glucose monitoring is documented in official warnings for individuals managing diabetes.

Q: Can Co-Almacin cause issues with my stomach or digestion?

A: Official labeling commonly lists gastrointestinal issues among the most frequent side effects, which include diarrhea, nausea, and vomiting. Regulatory documents state that taking the medicine at the start of a meal is recommended to minimize potential gastrointestinal intolerance.

Q: Is Co-Almacin a pain reliever?

A: No, Co-Almacin is officially classified as an antibacterial drug that belongs to the penicillin class. Its primary purpose is to treat bacterial infections, and it is not categorized in the pharmacological class of pain relievers or analgesics.

How should Co-Almacin be stored and disposed of?

How to Store and Dispose of Co-Almacin

Storage requirements for Co-Almacin (Amoxicillin and Clavulanate Potassium) depend strictly on the product form as documented in official labeling.

Product Form Storage Requirement
Oral Tablets & Dry Powder Store at controlled room temperature; keep in the original container with the lid tightly closed; protect from excess moisture and heat.
Reconstituted Suspension Must be refrigerated (2 C to 8 C).

The reconstituted liquid suspension has a strict shelf-life limit and must be discarded after 10 days, even if refrigerated. All forms of this medication must be kept out of the sight and reach of children to ensure safety. Disposal of any expired or unused product must be done according to local regulatory instructions, typically advising against flushing down wastewater.

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

Available in countries:

Equivalent of Co-Almacin found in:

A-Z Index: