Antibiotics Classification

antibiotic classes diagram

Antibiotics make up one of the most popular drug classes. Antibiotics are used to treat a wide range of diseases, caused by various pathogenic microorganisms.

A few decades ago, antibiotics were referred to the class of non-prescription medicines. Today, however, antibiotics are available only by prescription. This is due to the fact that antibiotics misuse may lead to the development of pathogens resistance to these drugs.

This review provides information about the antibiotics classification, different groups of antibiotics, and find out, where you may buy antibiotics without a prescription.

Today, there are several groups of antibiotics, each of which has a high activity against one or more types of infectious agents. Antibiotics are divided into the following classes:

  • Macrolides
  • Beta lactams
  • Tetracyclines
  • Lincosamides
  • Glycopeptides
  • Anthracyclines
  • Aminoglycosides
  • Chloramphenicol

Such classification of the antibiotics allows most effectively determine the scope of each drug type. Different groups of antibiotics may be effective in the treatment of different infectious diseases, including:

  • Urinary Tract Infections (UTI)
  • Respiratory tract infections (RTIs)
  • Sexually Transmitted Diseases (STDs)

Beta-lactam antibiotics are most widely used in clinical practice. This class includes several types of antibiotics, including:

  • penicillins (Ampicillin)
  • carbapenems (Loracarbef)
  • monobactams (Aztreonam)
  • cephalosporins (Cephalexin)

Penicillins are among the first antibiotics, which started to be used for the treatment of infectious diseases in the early 30-ies of the XX century. However, this type of antibiotics has a low efficiency in the treatment of diseases, caused by staphylococci, such as:

  • sepsis,
  • tonsillitis,
  • pleurisy,
  • meningitis,
  • pneumonia,

Due to the insufficient activity of penicillins, cephalosporins or other types of antibiotics are usually used in these diseases. Beta-lactam antibiotics are available for sale under the brand names Suprax (Cefixime), Azactam (Aztreonam), Pfizerpen (Penicillin G), and Doribax (Doripenem).

Along with the beta-lactam antibiotics, tetracyclines are one of the earliest groups of antimicrobials. According to the antibiotics classification, tetracyclines are divided into oxytetracycline, doxycycline and dimethyl chlortetracycline.

Tetracycline antibiotics are considered to be the most-selling class. The most popular branded tetracyclines, which you may order on the online pharmacies, are as follows:

  • Tygacil (Tigecycline),
  • Terramycin (Oxytetracycline),
  • Declomycin (Demeclocycline).

They are widely used to treat severe acne, ricketsiosis, chlamydial infection in children and adults. Such popularity of this antibiotics group has led to the emergence of resistance to tetracyclines in many pathogens.

Aminoglycosides are another group of antibiotics with a broad spectrum of activity. If you want to buy antibiotics from the aminoglycosides group, you may buy them on the online pharmacies under the following brand names:

  • Kantrex (Kanamycin),
  • Mycifradin (Neomycin),
  • Netromycin (Netilmicin),
  • Garamycin (Gentamicin).

Antibiotics in this class are widely used against gram-negative enteric bacteria. However, aminoglycosides are poorly absorbed in the gastrointestinal tract, when used orally.

Therefore, these antibiotics are best used as intramuscular injection for a more effective treatment of infections. Aminoglycosides exhibit toxicity, so they are prescribed only in severe diseases, such as peritonitis and septicemia.

Chloramphenicol class antibiotics also have a broad spectrum of action. They are indicated for medical treatment of diseases, caused by Gram-negative bacteria, such as:

  • Colibacillus,
  • Gonococcus,
  • Spirochaetales,
  • Meningococcus,
  • Klebsiella pneumoniae,
  • Haemophilus influenzae.

For an effective treatment of infectious diseases, caused by these bacteria, you may buy the antibiotic Chloromycetin (Chloramphenicol), which is available on the online pharmacies without a prescription. This antibiotic is only recommended for oral administration to increase the therapeutic effect of Chloromycetin.

The classification of antibiotics also includes lincosamides. High doses of these antibiotics are prescribed to eliminate the causative agents of malaria tropica. Lincosamides are effective against the non-spore anaerobes, gram-positive microorganisms, including some MRSA strains, as well as against some protozoa:

  • Toxoplasma gondii,
  • Pneumocystis carinii,
  • Plasmodium falciparum.

To quickly cure sepsis or anaerobic infections, order now one of lincosamides: Cleocin (Clindamycin) or Lincocin (Lincomycin). Anthracyclines have a strong cytostatic effect. The mechanism of these antibiotics action lies in the suppression of cell division. Due to this, anthracyclines are often prescribed for reducing the risk of infectious complications in cancer patients.

To quickly and effectively prevent the spread of pathogens, your doctor may recommend you on buying such anthracyclines, as:

  • Doxil (Doxorubicin),
  • Ellence (Epirubicin),
  • Novantrone (Mitoxantrone).

Another group of antibiotics that are effective in severe infections, are glycopeptides. They have a high activity in the treatment of diseases, caused by pathogens, resistant to other antibiotics, such as:

  • Enterococci,
  • Pneumococci,

The most popular brands of glycopeptides, which you can buy in Canada and the UK, are Targocid (Teicoplanin) and Vancocin (Vancomycin). If these antibiotics are not available in your local pharmacies, you may order them online.

One more group in antibiotics classification are the macrolides. These drugs are effective against most strains of microorganisms, known today. Resistance to macrolides has only developed in:

  • Acinetobacter,
  • Pseudomonas,

These antibiotics can accumulate within the cells, thereby completing the process of pathogens absorption and entrapment by the phagocytes. For this reason, macrolides are often used to treat intracellular infections, including:

  • herpes,
  • ureaplasmosis,
  • chlamydia,

Such branded macrolides, as Ketek (Telithromycin), Zithromax (Azithromycin) or Biaxin (Clarithromycin) are bought most often for the treatment of these types of diseases.

To date, namely Azithromycin is the drug of choice for the treatment of many infections in infants and adults. This is due to the fact that pathogens produce resistance to this macrolide less often, than to other antibiotic classes.

The antibiotics classification will allow you to better understand the characteristics of each group of these drugs and to choose the right drug for the treatment of various types of infectious diseases.

You may order antibiotics of any group without prescription on the online pharmacies. This form the antibiotics purchase is now the most popular and convenient. In addition, you may get a discount, when ordering antibiotics online.