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Buy Antibiotics OnlineInformation, Articles, Resources
Antibiotics are among the most frequently prescribed medications in modern medicine. The first antibiotic was penicillin, discovered accidentally from a mold culture. Today, over 100 different antibiotics are available to health care professionals to cure minor discomforts as well as life-threatening infections. Antibiotics are powerful drugs used for treating many serious diseases. They work by killing bacteria or preventing their growth. Most infections result from either bacteria or viruses. Bacteria are responsible for: most ear infections; some sinus infections; urinary tract infections. Viruses are responsible for: colds; influenza; sore throats; coughs. Most bacterial infections get better by themselves and do not require treatment. Infections such as bladder infections, sexually transmitted diseases, boils, and ear infections often require treatment with an antibiotic. There are many different types of antibiotics and each can be used to treat a different kind of infection. Although there are several classification schemes for antibiotics, based on bacterial spectrum or type of activity (bactericidal vs. bacteriostatic), the most useful is based on chemical structure. Antibiotics within a structural class will generally show similar patterns of effectiveness, toxicity, and allergic potential.
The main classes of antibiotics include:
Antibiotics are drugs only available through prescription. For more information about antibiotics read articles:
Price-RX.com offers you price comparison of the following antibiotics used for treatment or prevention of bacterial infections: Cephalosporins Cephalosporins are used in the treatment of infections caused by bacteria. They work by killing bacteria or preventing their growth. Cephalosporins work the same way as penicillins: they interfere with the peptidoglycan synthesis of the bacterial wall by inhibiting the final transpeptidation needed for the cross-links. This effect is bactericidal. Cephalosporins are grouped into "generations" by their antimicrobial properties. The first cephalosporins were designated first generation while later, more extended spectrum cephalosporins were classified as second generation cephalosporins. Currently, three generations of cephalosporins are recognized and a fourth has been proposed. Significantly, each newer generation of cephalosporins has greater gram negative antimicrobial properties than the preceding generation. Conversely, the "older" generations of cephalosporins have greater gram positive (staphylococcus and streptococcus) coverage than the "newer" generations.
Fluoroquinolones Fluoroquinolones were first introduced in 1986, but they are really modified Quinolones, a class of antibiotics, whose accidental discovery occurred in the early 1960's. Fluoroquinolone antibiotics are highly potent and considered relatively safe. The fluoroquinolones (fluoridated quinolones) are broad-spectrum bactericidal agents, that inhibit DNA gyrase, prevent DNA supercoiling and DNA synthesis. Fluoroquinolones are useful in pneumonia, urinary tract infections, bacterial diarrhea, and skin and soft tissue infection. These agents are metabolized in the liver and excreted in the urine. Fluoroquinolones are not indicated for use in infants or children, due to the potential of damaging cartilage and musculoskeletal effects (bone development problems). Macrolides The macrolide antibiotics are derived from Streptomyces bacteria, and got their name because they all have a macrocyclic lactone chemical structure. Erythromycin, the prototype of this class, has a spectrum and use similar to penicillin. Newer members of the group, azithromycin (Zithromax) and clarithyromycin, are particularly useful for their high level of lung penetration. Macrolide antibiotics are used to treat respiratory infections, such as pharyngitis, sinusitis, and bronchitis, genital, gastrointestinal tract, soft tissue, skin infections caused by susceptible strains of specific bacteria. Penicillins The penicillins are the oldest class of antibiotics, and have a common chemical structure which they share with the cephalopsorins. Aminopenicillins such as ampicillin and amoxicillin have an extended spectrum of action compared with the natural penicillins; extended spectrum penicillins are effective against a wider range of bacteria. Tetracyclines Tetracyclines got their name because they share a chemical structure that has four rings. They are derived from a species of Streptomyces bacteria. Broad spectrum bacteriostatic agents, the tetracyclines may be effective against a wide variety of microorganisms, including rickettsia and amebic parasites. Other antibiotics The antibiotic prescribed by your doctor is for your present infection only. It is very important to follow the directions for the medication prescribed. Antibiotics are generally given for a specified period of time (7-10 days, for example) to be taken at specific intervals (every 4, 6, 8 or 12 hours). This is necessary to keep the right amount of the medication in the bloodstream. Too much of the medication may cause an adverse reaction, too little may not be completely effective. Some medicines have specific instructions for taking them before, after, or during meals. Don't stop taking medications a few days early if you start feeling better. A complete course of antibiotics is needed to kill all of the harmful bacteria. A shortened course of antibiotics often wipes out only the most vulnerable bacteria, which allows relatively resistant bacteria to survive and thrive. Pharmacies, Prices
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