Antibiotics and Their Types, Uses and Side Effects

Class Action - Antibiotics and Their Types, Uses and Side Effects

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An antibiotic is a drug that kills or slows the growth of bacteria. Antibiotics are one class of antimicrobials, a larger group which also includes anti-viral, anti-fungal, and anti-parasitic drugs. Antibiotics are chemicals produced by or derived from microorganisms (i.e. Bugs or germs such as bacteria and fungi). The first antibiotic was discovered by Alexander Fleming in 1928 in a primary breakthrough for medical science.

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Antibiotics are among the most often prescribed medications in contemporary medicine.
Some antibiotics are 'bactericidal', meaning that they work by killing bacteria. Other antibiotics are 'bacteriostatic', meaning that they work by stopping bacteria multiplying.

Each different type of antibiotic affects different bacteria in different ways. For example, an antibiotic might inhibit a bacterium's quality to turn glucose into energy, or its quality to invent its cell wall. When this happens, the bacterium dies instead of reproducing.

Some antibiotics can be used to treat a wide range of infections and are known as 'broad-spectrum' antibiotics. Others are only efficient against a few types of bacteria and are called 'narrow-spectrum' antibiotics.

Side effects of antibiotics

Antibiotics can surely save lives and are efficient in treating illnesses caused by bacterial infections. However, like all drugs, they have the possible to cause unwanted side effects. Many of these side effects are not dangerous, although they can make life miserable while the drug is being taken.

In general, antibiotics rarely cause serious side effects. The most common side effects from antibiotics are diarrhea, nausea, vomiting. Fungal infections of the mouth, digestive tract and vagina can also occur with antibiotics because they destroy the protective 'good' bacteria in the body (which help prevent overgrowth of any one organism), as well as the 'bad' ones, responsible for the infection being treated.

Some people are allergic to antibiotics, particularly penicillins. Allergic reactions cause swelling of the face, itching and a skin rash and, in severe cases, breathing difficulties. Allergic reactions need prompt treatment.

Types of antibiotics

There are many different kinds of antibiotics. The type of antibiotics you take depends on the type of infection you have and what kind of antibiotics are known to be effective.

The main classes of antibiotics:
Aminoglycosides Cephalosporins Fluoroquinolones Macrolides Penicillins Tetracyclines
Macrolides

There are a join of new relatives of erythromycin (azithromycin and clarithromycin) that work the same way, but kill more bugs and have slightly fewer side effects. The erythromycin-like antibiotics are also known as macrolides. Macrolides belong to the polyketide class of natural products. Macrolide antibiotics are used to treat respiratory tract infections, genital, gastrointestinal tract, soft tissue infections caused by susceptible strains of definite bacteria.

Macrolides bind with ribosomes from susceptible bacteria to prevent protein production. This operation is in general bacteriostatic, but can also be bactericidal in high concentrations.

Macrolides cause very miniature allergy problems compared to the penicillins and cephalosporins, the biggest concern with these medicines is that they can irritate the stomach.

The most commonly-prescribed macrolides:
erythromycin clarithromycin azithromycin roxithromycin
Aminoglycosides

Aminoglycoside antibiotics are used to treat infections caused by gram-negative bacteria. Aminoglycosides may be used along with penicillins or cephalosporins to give a two-pronged charge on the bacteria. Aminoglycosides work quite well, but bacteria can become defiant to them. Since aminoglycosides are broken down surely in the stomach, they can't be given by mouth and must be injected. When injected, their side effects include possible damage to the ears and to the kidneys. This can be minimized by checking the number of the drug in the blood and adjusting the dose so that there is enough drug to kill bacteria but not too much of it. Generally, aminoglycosides are given for short time periods.

The aminoglycosides are drugs which stop bacteria from development proteins. This corollary is bactericidal.

The most commonly-prescribed aminoglycosides:
amikacin gentamicin kanamycin neomycin streptomycin tobramycin
Cephalosporins

Cephalosporins are grouped into "generations" by their antimicrobial properties. Cephalosporins are categorized chronically, and are therefore divided into first, second, and third generations. Currently, three generations of cephalosporins are recognized and a fourth has been proposed. Each newer generation of cephalosporins has greater gram negative antimicrobial properties than the preceding generation. The later-generation cephalosporins have greater corollary against defiant bacteria.

Cephalosporins are used to treat pneumonia, strep throat, staph infections, tonsillitis, bronchitis, otitis media, various types of skin infections, gonorrhea. Cephalosporin antibiotics are also generally used for surgical prophylaxis. Cephalosporins are closely associated to the penicillins.

Cephalosporins have a bacteriocidal corollary by inhibiting the synthesis of the bacteria cell wall.

Fluoroquinolones are known as broad-spectrum antibiotics, meaning they are efficient against many bacteria. Fluoroquinolones are used to treat most common urinary tract infections, skin infections, and respiratory infections (such as sinusitis, pneumonia, bronchitis). common side effects of fluoroquinolones include in general the digestive system: mild stomach pain or upset, nausea, vomiting, and diarrhea. These are regularly mild and go away over time. Fluoroquinolones should not be given while pregnancy.

Fluoroquinolones inhibit bacteria by interfering with their quality to make Dna. This operation makes it difficult for bacteria to multiply. This corollary is bacteriocidal.

The most commonly-prescribed fluoroquinolones:
ciprofloxacin gatifloxacin gemifloxacin levofloxacin moxifloxacin norfloxacin ofloxacin trovafloxacin
Penicillins

Penicillin was the first antibiotic discovered by Alexander Fleming in 1929. Penicillins are used to treat skin infections, dental infections, ear infections, respiratory tract infections, urinary tract infections, gonorrhea. Penicillins are sometimes combined with other ingredients called beta-lactamase inhibitors, which protect the penicillin from bacterial enzymes that may destroy it before it can do its work.

Penicillins are regularly very safe. The many risk is an allergic reaction, which can be severe. people who have been allergic to cephalosporins are likely to be allergic to penicillins.

Penicillins block the construction of bacteria cell walls, causing the walls to break down, and ultimately killing the bacteria.

The most commonly-prescribed penicillins:
amoxicillin ampicillin bacampicillin oxacillin penicillin
Tetracyclines

Tetracyclines are a house of antibiotics used to treat a broad spectrum of bacterial infections. Tetracyclines were discovered in the late 1940s and were highly beloved when they were first discovered. The tetracycline antibiotics have a very broad spectrum of action.

Tetracyclines are used to treat mild acne, Rocky Mountain spotted fever, Lyme Disease, upper respiratory tract infections, urinary tract infections, sexually transmitted diseases, typhus.

The most commonly-prescribed tetracyclines:
tetracycline doxycycline minocycline
Antibiotic resistance

Antibiotics are highly foremost in medicine, but unfortunately bacteria are capable of developing resistance to them. Antibiotic-resistant bacteria are germs that are not killed by generally used antibiotics. When bacteria are exposed to the same antibiotics over and over, the bacteria can turn and are no longer affected by the drug.

Bacteria have number of ways how they become antibiotic-resistant. For example, they possess an internal mechanism of changing their structure so the antibiotic no longer works, they invent ways to inactivate or neutralize the antibiotic. Also bacteria can change the genes coding for antibiotic resistance in the middle of them, development it possible for bacteria never exposed to an antibiotic to regain resistance from those which have. The problem of antibiotic resistance is worsened when antibiotics are used to treat disorders in which they have no efficacy (e.g. Antibiotics are not efficient against infections caused by viruses), and when they are used widely as prophylaxis rather than treatment.

Resistance to antibiotics poses a serious and growing problem, because some infectious diseases are becoming more difficult to treat. defiant bacteria do not acknowledge to the antibiotics and continue to cause infection. Some of these defiant bacteria can be treated with more qualified medicines, but there some infections that are difficult to cure even with new or experimental drugs.

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Antibiotics Classification And Side Effects

Class Action - Antibiotics Classification And Side Effects

Hello everybody. Now, I learned about Class Action - Antibiotics Classification And Side Effects. Which could be very helpful in my opinion therefore you. Antibiotics Classification And Side Effects

What are Antibiotics?

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The word "antibiotics" comes from the Greek anti ("against") and bios ("life"). Antibiotics are drugs that either destroy bacteria or forestall their reproduction. Antibiotics that kill bacteria are called "bactericidal" and the ones that stop the growth of bacteria are called "bacteriostatic".

Since penicillin's introduction while the 1940s, scientists developed numerous other antibiotics. Today, over 100 separate antibiotics are available. About 90% of antibiotics are made from living organisms such as bacteria, others are produced synthetically, either in whole or in part.

Antibiotics classification

Although there are several classification schemes for antibiotics, based on bacterial spectrum (broad, narrow) or route of management (injectable, oral, topical), or type of action (bactericidal, bacteriostatic), the most useful is based on chemical structure. Antibiotics within a structural class will ordinarily have similar patterns of effectiveness, toxicity, and allergic potential.

Most ordinarily used types of antibiotics are: Penicillins, Fluoroquinolones, Cephalosporins, Macrolides, and Tetracyclines. While each class is composed of manifold drugs, each drug is unique in some way.

Penicillins

The penicillins are the oldest class of antibiotics. Penicillins have a coarse chemical structure which they share with the cephalopsorins. Penicillins are ordinarily bactericidal, inhibiting formation of the cell wall.

There are four types of penicillins:
The natural pencillins are based on the traditional penicillin-G structure. Penicillin-G types are efficient against gram-positive strains of streptococci, staphylococci, and some gram-negative bacteria such as meningococcus. Penicillinase-resistant penicillins are active even in the nearnessy of the bacterial enzyme that inactivates most natural penicillins. Extended spectrum penicillins which are efficient against a wider range of bacteria. Aminopenicillins such as ampicillin and amoxicillin have an extended spectrum of action compared with the natural penicillins.
Penicillins side effects

Penicillins are among the least toxic drugs known. The most coarse side ensue of penicillin is diarrhea. Nausea, vomiting, and upset stomach are also common. In rare cases penicillins can cause immediate and delayed allergic reactions - specifically, skin rashes, fever, and anaphylactic shock. Penicillins are classed as class B while pregnancy.

Cephalosporins

Cephalosporins have a mechanism of action identical to that of the penicillins. However, the basic chemical structure of the penicillins and cephalosporins differs in other respects, resulting in some disagreement in the spectrum of antibacterial activity. Like the penicillins, cephalosporins interfere with synthesis of the bacterial cell wall and so are bactericidal.

Cephalosporins are among the most diverse classes of antibiotics, they are grouped into "generations" by their antimicrobial properties. Each generation has a broader spectrum of action than the one before.

The first generation cephalosporins include: cephalothin, cefazolin, cephapirin, cephradine, cephalexin, cefadroxil. Their spectrums of action are quite similar. They possess ordinarily excellent coverage against most gram-positive pathogens and changeable to poor coverage against most gram negative pathogens.

The second generation cephalosporins include: cefaclor, cefamandole, cefonicid, ceforanide, cefuroxime. In expanding to the gram-positive spectrum of the first generation cephalosporins, these agents have extensive gram-negative spectrum. Cefoxitin and cefotetan also have good action against Bacteroides fragilis.

The third generation cephalosporins have much extensive gram-negative activity. However, some members of this group have decreased action against gram-positive organisms. The third generation cephalosporins include: cefcapene, cefdaloxime, cefditoren, cefetamet, cefixime, cefmenoxime, cefodizime, cefoperazone, cefotaxime, cefpimizole, cefpodoxime, ceftibuten, ceftriaxone. They have the benefit of suitable dosing schedules, but they are expensive.

The fourth generation cephalosporins are extended-spectrum agents with similar action against gram-positive organisms as first-generation cephalosporins. They also have a greater resistance to beta-lactamases (bacterial enzymes that may destroy antibiotic before it can do its work) than the third generation cephalosporins. Many fourth generation cephalosporins can cross blood brain barrier and are efficient in meningitis. The fourth generation cephalosporins include: cefclidine, cefepime, cefluprenam, cefozopran, cefpirome, cefquinome.

Cephalosporin side effects

Cephalosporins ordinarily cause few side effects. coarse side effects related these drugs include: diarrhoea, nausea, mild stomach cramps or upset. Practically 5Ц10% of patients with allergic hypersensitivity to penicillins will also have cross-reactivity with cephalosporins. Thus, cephalosporin antibiotics are contraindicated in habitancy with a history of allergic reactions (urticaria, anaphylaxis, interstitial nephritis, etc) to penicillins or cephalosporins. Cephalosporin antibiotics are classed as fertilization class B.

Fluoroquinolones

Fluoroquinolones are the newest class of antibiotics. Their generic name often contains the root "floxacin". They are synthetic antibiotics that belong to the house of antibiotics called quinolones. The older quinolones are not well absorbed and are used to treat mostly urinary tract infections. The newer fluoroquinolones are broad-spectrum bacteriocidal drugs that are chemically unrelated to the penicillins or the cephaloprosins. Because of their excellent absorption fluoroquinolones can be administered not only by intravenous but orally as well.

Commonly used fluoroquinolones comprise ciprofloxacin, levofloxacin, lomefloxacin, norfloxacin, sparfloxacin, clinafloxacin, gatifloxacin, ofloxacin, trovafloxacin.

Fluoroquinolones side effects

Fluoroquinolones are well tolerated and relatively safe. The most coarse side effects comprise nausea, vomiting, diarrhea, abdominal pain. Other more serious but less coarse side effects are central nervous law effects (headache, blurring and dizziness), phototoxicity (more coarse with lomefloxacin and sparfloxacin). All drugs in this class have been related with convulsions. Fluoroquinolones are classed as fertilization class C.

Tetracyclines

Tetracyclines got their name because they share a chemical structure that has four rings. They are derived from a species of Streptomyces bacteria. Tetracycline antibiotics are broad-spectrum bacteriostatic agents, that inhibit bacterial protein synthesis. Tetracyclines may be efficient against a wide collection of microorganisms, along with rickettsia and amebic parasites.

Tetracyclines are used in the rehabilitation of infections of the respiratory tract, sinuses, middle ear, urinary tract, skin, intestines. Tetracyclines also are used to treat Gonorrhoea. Their most coarse current use is in the rehabilitation of gradually severe acne and rosacea.

The most ordinarily prescribed tetracycline antibiotics are: tetracycline, doxycycline, minocycline, oxytetracycline.

Tetracycline side effects

Drugs in the tetracycline class become toxic over time. Expired drugs can cause a perilous syndrome resulting in damage to the kidneys.

Common side effects related with tetracyclines comprise cramps or burning of the stomach, diarrhea, sore mouth or tongue. Tetracyclines can cause skin photosensitivity, which increases the risk of sunburn under exposure to Uv light. This may be of singular significance for those intending to take on holidays long-term doxycyline as a malaria prophylaxis. Rarely, tetracyclines may cause allergic reactions. Very rarely severe headache and vision problems may be signs of perilous secondary intracranial hypertension.

Tetracycline antibiotics should not be used in children under the age of 8, and specifically while periods of tooth development. Tetracyclines are classed as fertilization class D. Use while fertilization may cause alterations in bone development.

Macrolides

The macrolide antibiotics are derived from Streptomyces bacteria, and got their name because they all have a macrocyclic lactone chemical structure. The macrolides are bacteriostatic, binding with bacterial ribosomes to inhibit protein synthesis. Erythromycin, the prototype of this class, has a spectrum and use similar to penicillin. Macrolide antibiotics are used to treat respiratory tract infections (such as pharyngitis, sinusitis, and bronchitis), genital, gastrointestinal tract, and skin infections.

The most ordinarily prescribed macrolide antibiotics are: erythromycin, clarithromycin, azithromycin, roxithromycin, troleandomycin.

Macrolides side effects

Side effects related with macrolides comprise nausea, vomiting, and diarrhea; infrequently, there may be temporary auditory impairment. Azithromycin has been rarely related with allergic reactions, along with angioedema, anaphylaxis, and dermatologic reactions. Oral erythromycin may be extremely irritating to the stomach and when given by injection may cause severe phlebitis. Macrolide antibiotics should be used with caution in patients with liver dysfunction. fertilization class B: Azithromycin, erythromycin. fertilization class C: Clarithromycin, dirithromycin, troleandomycin.

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