Penicillin V Potassium Tablets

This product is a penicillin antibiotic. The antibacterial spectrum is the same as penicillin. It has antibacterial activity against most Gram-positive bacteria, Gram-negative cocci, individual Gram-negative bacilli (such as Haemophilus), spirochetes and actinomycetes, but most Staphylococcus strains (90%) including Staphylococcus aureus and coagulase-negative Staphylococci can produce β-lactamase to hydrolyze this product and inactivate it. The activity of this product against most sensitive strains is 2 to 5 times weaker than that of penicillin. It has no antibacterial effect on strains that produce penicillinase. The mechanism of action of this product is to inhibit the synthesis of bacterial cell walls, causing the bacteria to rupture and dissolve rapidly.

The main ingredient of this product is penicillin V potassium, and its chemical name is (2S, 5R, 6R)-3,3-dimethyl-7-oxo-6-(2-phenoxyacetylamino)-4-thia-1-azabicyclo[3.2.0]-heptane-2-carboxylic acid potassium salt.

This product is a white tablet or a film-coated tablet or a sugar-coated tablet, which appears white after removing the coating.

This product is suitable for mild and moderate infections caused by penicillin-sensitive strains, including tonsillitis, pharyngitis, scarlet fever, erysipelas, etc. caused by streptococci; bronchitis, pneumonia, otitis media, sinusitis caused by pneumococci, and skin and soft tissue infections caused by sensitive staphylococci, etc. This product can also be used for spirochetal infections and as a preventive drug for recurrent rheumatic fever and infective endocarditis.

Oral. Streptococcal infection in adults: 125-250 mg once, once every 6-8 hours, for a course of 10 days. Pneumococcal infection: 250-500 mg once, once every 6 hours, for a course of at least 2 days after the fever subsides. Staphylococcal infection, spirochete infection (Fensen angina): 250-500 mg once, once every 6-8 hours. Prevention of recurrence of rheumatic fever: 250 mg once, twice a day. Prevention of endocarditis: Take 2g of this product orally 1 hour before tooth extraction or upper respiratory tract surgery, and take 1g after 6 hours (half the dose for children under 27 kg). Children, according to weight, take 2.5-9.3 mg/kg once, once every 4 hours; or 3.75-14 mg/kg once, once every 6 hours; or 5-18.7 mg/kg once.

1. Common gastrointestinal reactions such as nausea, vomiting, upper abdominal discomfort, diarrhea and black hairy tongue. 2. Allergic reactions: rash (especially prone to occur in patients with infectious mononucleosis), urticaria and other serum sickness-like reactions, laryngeal edema, drug fever and eosinophilia. 3. Superinfection: Long-term or large-scale use of this product can cause penicillin-resistant Staphylococcus aureus, Gram-negative bacilli or Candida albicans infection (brown or even black tongue coating). 4. Rare hemolytic anemia, transient increase in serum aminotransferase, leukopenia, thrombocytopenia, neurotoxicity and nephrotoxicity.

It is contraindicated for patients with positive penicillin skin test reaction, those who are allergic to this product and other penicillins, and those with infectious mononucleosis.

Precautions for children: Not yet clear. Precautions for pregnancy and lactation: Not yet clear. Precautions for the elderly: Not yet clear.

1. Probenecid, aspirin, indomethacin, phenylbutazone, and sulfonamides can reduce the excretion of this product in the renal tubules, thereby increasing the blood concentration of this product, prolonging the blood elimination half-life (t1/2β), and possibly increasing the toxicity. 2. When this product is used in combination with allopurinol, the incidence of rash increases significantly, so it should be avoided. 3. This product should not be used in combination with acetaldehyde dehydrogenase inhibitors such as disulfiram. 4. When this product is used in combination with chloramphenicol for bacterial meningitis, the incidence of long-term sequelae is higher than when either is used alone. 5. This product can stimulate estrogen metabolism or reduce its enterohepatic circulation, thus reducing the effectiveness of oral contraceptives. 6. Antibiotics such as chloramphenicol, erythromycin, tetracyclines, and antibacterial drugs such as sulfonamides can interfere with the bactericidal activity of this product, so it should not be used in combination with this product, especially in the treatment of meningitis or severe infections that urgently require bactericidal drugs. 7. This product can enhance the effect of warfarin. 8. Clavulanic acid can enhance the antibacterial activity of this product against β-lactamase-producing bacteria; aminoglycoside antibiotics can generally enhance the in vitro bactericidal effect of this product against Enterococcus faecalis at sub-inhibitory concentrations.

Keep away from light, seal tightly and store in a cool dark place.

0.236 g (400,000 units) based on C16H18N205S

36 months

Chongqing KERUI Pharmaceutical (GROUP) Co., Ltd.

• Founded in:

  1999-03-03

• Address:

  No. 2 Dashizhi Road, Nan'an Economic and Technological Development Zone, Chongqing

• Tax NO.:

  915001082031636780

• Registered Funds:

  110.6375 million yuan

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