A broad-spectrum third-generation cephalosporin that is very stable to beta-lactamase, widely distributed in body fluids and various organs, with few side effects and good stability. It has strong antibacterial activity against Enterobacteriaceae, and both influenza bacilli and gonococci that produce and do not produce beta-lactamase are highly sensitive to this product. It has stronger antibacterial effects on Escherichia coli, aerogenes, various Proteus species, and influenza bacilli than second-generation cephalosporins. It has stronger activity against gram-positive cocci such as hemolytic streptococci and pneumococci.

Amoxicillin is a broad-spectrum penicillin antibiotic, which can protect it from hydrolysis by β-lactamase when used in combination with potassium clavulanate. It has good effects on enzyme-producing Staphylococcus aureus, Staphylococcus epidermidis, coagulase-negative Staphylococci and enterococci, and also has good antibacterial activity against certain β-lactamase-producing Enterobacteriaceae, Haemophilus influenzae, Moraxella catarrhalis, Bacteroides fragilis, etc.

Potassium clavulanate itself has only weak antibacterial activity, but it has a strong broad-spectrum β-lactamase inhibitory effect and can protect amoxicillin from β-lactamase hydrolysis.

Amoxicillin is a broad-spectrum penicillin antibiotic that can be hydrolyzed by β-lactamase. When used in combination with potassium clavulanate, its antibacterial spectrum is expanded, and it has a good effect on enzyme-producing Staphylococcus aureus, Staphylococcus epidermidis, coagulase-negative Staphylococci and enterococci. It also has good antibacterial activity against certain β-lactamase-producing Enterobacteriaceae, Haemophilus influenzae, Moraxella catarrhalis, Bacteroides fragilis, etc.

Potassium clavulanate itself has only weak antibacterial activity, but it has a strong broad-spectrum β-lactamase inhibitory effect and can protect amoxicillin from β-lactamase hydrolysis.

Ampicillin sodium is a broad-spectrum semi-synthetic penicillin. This product has a strong antibacterial effect on hemolytic streptococci, Streptococcus pneumoniae and non-penicillinase-producing Staphylococci, which is similar to or slightly inferior to penicillin. Ampicillin also has a good antibacterial effect on viridans streptococci, and is better than penicillin on enterococci and Listeria. This product has antibacterial activity against Corynebacterium diphtheriae, Bacillus anthracis, Actinomyces, Haemophilus influenzae, Bordetella pertussis, Neisseria and anaerobic bacteria except Bacteroides fragilis. Some Proteus mirabilis, Escherichia coli, Salmonella and Shigella are sensitive to this product. Ampicillin exerts its bactericidal effect by inhibiting bacterial cell wall synthesis.