Are penicillin and roxithromycin opposites?

All belong to the macrolide class of antibiotics, and roxithromycin is a semi-synthetic antibiotic that is taken 1-2 times a day. Erythromycin is taken 3-4 times a day. Roxithromycin has a slightly worse effect on gram-positive bacteria than erythromycin, and a stronger effect on Legionella pneumonica than erythromycin.

The main differences between erythromycin and roxithromycin are as follows:

1. The chemical composition is different.

The chemical composition of erythromycin is: 5-(4-dimethylaminetetrahydro-3-hydroxy-6-methyl-2-pyranooxy)-6,11,12,13-tetrahydroxy-2,4,6,8,1o,12-hexamethyl-9-oxo-3-(tetrahydro-5-hydroxy-4-methoxy-4,6-dimethyl-2-pyranooxy)pentadecanoic acid--lactone, the molecular formula is C37H67NO13, and the molecular weight is;

The chemical composition of erythromycin is: the molecular formula is C41H76N2O15 and the molecular weight is.

Roxithromycin".

The differences between erythromycin and penicillin are as follows:

First, the antimicrobial spectrum is different.

1. Erythromycin belongs to the macrolide class of antibiotics.

2. Penicillin belongs to the antibiotics of the phantomam class.

Second, the sterilization method is different.

1. Erythromycin is a bacterium that inhibits the growth of bacteria.

2. Penicillin can directly kill bacteria.

Third, the way of medication is different.

1. Erythromycin is an antibacterial drug.

2. Penicillin is a bactericidal drug.

Pharmacology uses dozens of pages of explanations, so it's not too likely to give you a detailed answer. I can only tell you: there are many types of antibiotics, and doctors use more than just the ones you mentioned. In general, antibiotics have their own principles.

The antimicrobial spectrum is different (susceptibility to different bacteria).

Different, (some damage to the liver and kidney, some *** less) different sterilization methods (some sterilization and some antibacterial) (some destroy the cell wall of bacteria, some inhibit the protein synthesis of bacteria, and some tissue bacteria RNA replication).

Pharmacokinetics differ (how much time passes in the blood and how much time it is excreted from the body).

They are different types of antibiotics with similar basic functions.

Do not squeeze your hands when acne occurs to prevent secondary infection.

I got acne when I was in college, and I was like that when I came out to work, fortunately, my colleague asked me to check Qin Shuya's face, and now it will disappear quickly even if it has a long period.

One has Luo, one doesn't.

These are anti-inflammatory drugs, but they are not divided into old and middle-aged people with annual rent, first of all, it depends on whether you are allergic to penicillin, and then look at what kind of medicine you usually use

It's not that it didn't work for reeds. It's about making a difference. Of course, it may not be useful. This question is also well explained. In fact, it is a kind of antimicrobial resistance of bacteria.

Natural selection, survival of the fittest", only by better adapting to the environment, can we better survive. This is the basic law of survival in nature. Many antibiotics can kill or inhibit the growth and reproduction of bacteria.

If this phenomenon continues, the bacteria will continue to be killed, so in order for the bacteria to survive, it will continue to evolve and develop resistance to antibiotics through different pathways to adapt to the environment in which antibiotics exist. And if you accompany Naxiang to change to penicillin, it will actually improve its living conditions. Penicillin is of course less effective.

Penicillin can ** the following infections: (mostly infusions**, skin tests are required, otherwise allergic patients will cause allergic reactions, and in severe cases, death) 1 Pharyngitis, tonsillitis, scarlet fever, erysipelas, cellulitis and puerperal fever 2 Pneumonia, otitis media, meningitis and bacteremia 3 Tetanus, gas gangrene and other clostridial infections 4 Syphilis (including congenital syphilis) and leptospirosis 5 Relapsing fever, diphtheria, endocarditis 6Meningoccal meningitis, gonorrhea, Lyme disease, rat bite fever Erythromycin is suitable for pneumonia caused by mycoplasma, neonatal conjunctivitis, infantile pneumonia, genitourinary tract infection (including non-gonococcal urethritis), diphtheria, ** infection, pertussis, respiratory tract infection (including pneumonia), long-term prevention of rheumatic fever and prevention of endocarditis, as well as gonorrhea, syphilis, acne, etc.

Erythromycin can be infused or taken orally, and is often used in patients with penicillin discomfort or allergies, and is a relatively effective antibiotic. Roxithromycin is an antibiotic derived from erythromycin when the effect of erythromycin is poor after long-term use. The range is similar to that of erythromycin, except that the duration of the drug effect is longer, and those bacterial infections that are resistant to erythromycin can be cured with roxithromycin.

To sum up, penicillin is the first generation of antibiotics, after the emergence of resistance and allergies, people developed erythromycin, erythromycin appeared after the use of drug resistance, and people were modified on the basis of erythromycin, the general structure is similar, named roxithromycin. The structures of erythromycin and penicillin are very different.

They all belong to the macrolide class and have about the same antimicrobial spectrum but the *** big point of erythromycin.