Calamox Tablet 625mg

About Calamox Tablet 625mg

Calamox Tablet Uses

• Upper respiratory tract infections including sinusitis, tonsillitis, pharyngitis, and otitis media (middle ear infections).
• Lower respiratory tract infections including community-acquired pneumonia, acute exacerbations of chronic bronchitis, and lung abscess.
• Urinary tract infections including cystitis, urethritis, and pyelonephritis caused by susceptible organisms.
• Skin and soft tissue infections including cellulitis, wound infections, animal bites, and infected eczema.
• Dental infections including periapical abscess, periodontal infections, and post-extraction infections.
• Bone and joint infections including osteomyelitis and septic arthritis caused by susceptible bacteria.
• Intra-abdominal infections and bacterial gastroenteritis caused by susceptible organisms.
• Gynaecological infections including pelvic inflammatory disease under specialist supervision.

Calamox Tablet Benefits

• Clavulanic Acid protects Amoxicillin from destruction by beta-lactamase enzymes, restoring activity against bacteria that would otherwise be resistant to Amoxicillin alone.
• Covers a significantly broader spectrum of bacteria than plain Amoxicillin, including many Staphylococcus, Klebsiella, and Haemophilus strains.
• Effective for polymicrobial infections where both gram-positive and gram-negative bacteria are involved, reducing the need for multiple antibiotics.
• Available in three strengths (375mg, 625mg, 1g), allowing dose selection based on infection severity and patient age.
• Oral formulation allows outpatient treatment of infections that previously required intravenous antibiotics, reducing hospitalization.

What Experts Say

Calamox contains Co-amoxiclav, a combination of Amoxicillin and Clavulanic Acid that is one of the most widely prescribed antibiotics globally for community-acquired bacterial infections.

How It Works

Amoxicillin is a beta-lactam antibiotic that kills bacteria by binding to penicillin-binding proteins (PBPs) on the bacterial cell wall. PBPs are enzymes that cross-link peptidoglycan chains, giving the cell wall structural integrity. When Amoxicillin occupies these binding sites, peptidoglycan synthesis is blocked, the cell wall weakens, and the bacterium undergoes osmotic lysis and death. This action is bactericidal and is most effective against actively dividing bacteria.

The Role of Clavulanic Acid

Many clinically important bacteria produce beta-lactamase enzymes that break the beta-lactam ring of Amoxicillin, rendering it inactive. Clavulanic Acid is a beta-lactamase inhibitor that binds irreversibly to these enzymes, permanently inactivating them. By blocking beta-lactamase activity, Clavulanic Acid restores and maintains the antibacterial effectiveness of Amoxicillin against resistant strains, extending its clinical utility across a much broader range of pathogens.

Clinical Note

Co-amoxiclav is associated with a higher incidence of cholestatic jaundice and hepatotoxicity compared to Amoxicillin alone, particularly with prolonged use. Liver function should be monitored in patients on extended courses. The full prescribed course must always be completed even if symptoms resolve early. Stopping an antibiotic course prematurely is a leading driver of antimicrobial resistance in Pakistan, where Co-amoxiclav resistance is rising. Sensitivity testing is strongly recommended for recurrent or complicated infections.

Drug Class

• Aminopenicillin Antibiotic with Beta-Lactamase Inhibitor.
• Amoxicillin: Broad-Spectrum Beta-Lactam Antibiotic.
• Clavulanic Acid: Beta-Lactamase Inhibitor.

Packaging and Quantity

• 625mg pack: 6 tablets per pack.
• 1g pack: 6 tablets per pack.
• 375mg pack: available in multiple pack sizes.

When Not to Use Calamox

• Known allergy or hypersensitivity to Amoxicillin, Clavulanic Acid, any penicillin, or any beta-lactam antibiotic.
• History of Co-amoxiclav-associated cholestatic jaundice or hepatic dysfunction.
• Viral infections such as the common cold, flu, or COVID-19, as antibiotics have no effect on viruses.
• Severe renal impairment without dose adjustment.
• Mononucleosis (glandular fever), as Amoxicillin commonly causes a widespread rash in this condition.

Calamox Tablet 625mg formula

• Co-amoxiclav

Available forms

• Tablets
• Suspension
• Injection
• Drops

How to use Calamox Tablet 625mg?

• Calamox should always be taken at the start of a meal to improve absorption and reduce the risk of gastrointestinal side effects.
• The tablet should be swallowed whole with a full glass of water. It should not be crushed or chewed.
• Dairy products may interfere with absorption. The tablet should be taken at least 2 hours before or after consuming milk, cheese, or yogurt.
• The full prescribed course must be completed even if symptoms improve before it ends. Stopping early risks treatment failure and antibiotic resistance.
• The standard adult dose for most infections is 625mg (one tablet) every 8 to 12 hours for 5 to 14 days depending on the infection type and severity as directed by the doctor.
• The dose should not be changed or the course extended without consulting a doctor.

Drug Interactions

All current medicines, supplements, and herbal products must be disclosed to the prescribing doctor before starting Calamox. Key interactions include:

• Warfarin and anticoagulants: Amoxicillin may enhance the anticoagulant effect of warfarin, increasing bleeding risk. INR should be monitored closely during concurrent use.
• Probenecid: Reduces kidney clearance of Amoxicillin, raising blood levels and prolonging its effect. Concurrent use should be avoided or monitored.
• Methotrexate: Co-amoxiclav reduces kidney clearance of methotrexate, significantly raising the risk of serious methotrexate toxicity.
• Oral contraceptives: Calamox may reduce the effectiveness of hormonal contraceptives by altering gut flora. Additional contraceptive precautions should be taken during and shortly after treatment.
• Allopurinol: Concurrent use increases the risk of skin rash, particularly in patients with gout.
• Live bacterial vaccines: Calamox may reduce the effectiveness of live bacterial vaccines such as the typhoid vaccine. Vaccination should be completed before starting antibiotic treatment where possible.
• Other antibiotics: Bacteriostatic antibiotics such as tetracyclines and chloramphenicol may interfere with the bactericidal action of Co-amoxiclav.

Risks and warnings

• Antibiotic resistance: Calamox must only be used for confirmed bacterial infections. Overuse and inappropriate prescribing are driving rapidly rising Co-amoxiclav resistance across Pakistan. Sensitivity testing is recommended for complicated or recurrent infections.
• Penicillin allergy and cross-reactivity: Patients with a penicillin allergy have a 1 to 10% risk of cross-reactivity with Calamox. A full allergy history including severity of previous reactions must be taken before prescribing.
• Liver toxicity: Co-amoxiclav is associated with cholestatic hepatitis and jaundice, particularly with prolonged use or repeat courses. Liver function should be monitored in at-risk patients.
• difficile colitis: All antibiotics including Calamox can trigger Clostridioides difficile overgrowth in the gut. Severe, persistent, or bloody diarrhea during or after treatment must be investigated immediately.
• Renal impairment: Amoxicillin is primarily excreted by the kidneys. Patients with renal impairment require dose reduction and monitoring.
• Mononucleosis: Calamox must not be used in patients with infectious mononucleosis (glandular fever), as Amoxicillin causes a widespread maculopapular rash in up to 80% of these patients.
• Pregnancy: Calamox should only be used during pregnancy when the prescribing doctor determines the benefit clearly outweighs the risk. It should not be used in the first trimester without specialist advice.
• Breastfeeding: Amoxicillin and Clavulanic Acid pass into breast milk in small amounts. A doctor should be consulted before use during breastfeeding.
• Driving and machinery: Calamox may cause dizziness in some patients. Caution is advised when driving or operating heavy machinery.

Calamox Tablet Side Effects

Most patients tolerate Calamox well when taken with food. Gastrointestinal side effects are the most common and are significantly reduced by taking the tablet at the start of a meal.

• Diarrhea or loose stools, the most commonly reported side effect.
• Nausea or vomiting.
• Abdominal discomfort or bloating.
• Skin rash or itching.
• Headache or dizziness.
• Mild elevation in liver enzymes on blood tests, usually without symptoms.

Serious side effects are rare. Medical attention should be sought immediately if any of the following occur:

• Severe or bloody diarrhea during or after treatment, which may indicate Clostridioides difficile colitis.
• Yellowing of the skin or eyes, dark urine, or severe abdominal pain, which may indicate cholestatic jaundice or liver damage.
• Signs of a severe allergic reaction including facial swelling, difficulty breathing, or anaphylaxis.
• Stevens-Johnson syndrome presenting as blistering or peeling of the skin and mucous membranes.
• Significant reduction in urination, which may indicate kidney involvement.

Storage Conditions

• Store at room temperature, below 25°C.
• Keep away from direct sunlight, heat, and moisture.
• Store in the original packaging to protect from humidity.
• Keep out of reach and sight of children.
• Do not use after the expiry date printed on the packaging.
• Do not store in the bathroom or near a kitchen sink.