Better effect on Gram Yin.

Penicillin G

Resistant to penicillins

Broad spectrum penicillin

Compound penicillin preparations

Injection: cephalothin/thiazide/zolin/ladine/thiomeda.

Oral: cephalexin/ladine/amexin.

Features: Resistant to G mold, effective against Gram-positive bacteria (including resistant to Staphylococcus aureus) 1>2>3 generations,

The stability of β-amidase is 1<2<3 generations, and it is nephrotoxic, but not for blood and brain. It is not used for central infection, gonorrhea and syphilis.

Injection: cefamandole/furoxin/methazole/cetin/tiant/titan, cefuroxime/methodol crosses the blood brain and can be used to dissolve the brain.

Oral administration: cefaclor/furoxime axetil/tifenzole.

Features: The effect on Gram-positive is close to the first generation, and the effect on Gram-negative is significant. It is effective against Neisseria spp., some indole ( ) mutatorbacilli, some Citrobacter and some Enterobacteriaceae.

Injection: cefotaxime/peridone/triaxone/azoxime/methoxime/tazidine/azonam/minox/imidazole/pilamide/sulfidine/diazine.

Oral administration: cefixime/butene/dinis/metate/trenexate/poxime/toluentate.

Features: It has broad and strong antibacterial activity, is Gram-positive <1 generation, and is basically non-nephrotoxic.

Injection: cefpirome/pyridoxime/clodin.

Gram positive effect = ceftriaxone 2nd generation cephalosporins.

Effect on Gram-negative: The third-generation cephalosporin has good stability against most β-amidases, so it has good effect on both Gram-positive and Gram-negative.

It has good effect on refractory and mixed infections, and has strong effect on Gram positive/negative/anaerobic bacteria.

It has poor effect on resistant Pseudomonas aureus and Pseudomonas aeruginosa. It is less effective on Pseudomonas aeruginosa <ciprofloxacin <sulfa.

For Gram-yin>imipenem, for Gram-yang<imipenem.