Ampicillin is an antibiotic used to prevent and treat a number of bacterial infections, such as respiratory tract infections, urinary tract infections, meningitis, salmonellosis, and endocarditis.[2] It may also be used to prevent group B streptococcal infection in newborns.[2] It is used by mouth, by injection into a muscle, or intravenously.[2] Like all antibiotics, it is not useful for the treatment of viral infections.
Common side effects include rash, nausea, and diarrhea.[2] It should not be used in people who are allergic to penicillin.[2] Serious side effects may include Clostridium difficile colitis or anaphylaxis.[2] While usable in those with kidney problems, the dose may need to be decreased.[2] Its use during pregnancy and breastfeeding appears to be generally safe.[2][3]
Ampicillin was discovered in 1958 and came into commercial use in 1961.[4][5] It is on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system.[6] Its wholesale cost in the developing world is between US$0.13 and 1.20 for a vial of the intravenous solution as of 2014.[7] In the United States, it is available as a generic medication and 10 days of treatment cost about $13.[2]
Contents
1Medical uses
1.1Diseases
1.2Bacteria
1.3Available forms
1.4Specific populations
2Contraindications
3Side effects
3.1Overdose
4Interactions
5Pharmacology
5.1Mechanism of action
5.2Pharmacokinetics
6History
7Cost
8Veterinary use
9See also
10References
11External links
Medical uses
Diseases
Bacterial meningitis; an aminoglycoside can be added to increase efficacy against Gram-negative meningitis bacteria[8]
Endocarditis by enterococcal strains (off-label use); often given with an aminoglycoside[9]
Gastrointestinal infections caused by contaminated water or food (for example, by Salmonella)[8]
Genito-urinary tract infections[8]
Healthcare-associated infections that are related to infections from using urinary catheters and that are unresponsive to other medications and unresponsive to other medications[10]
Otitis media (middle ear infection)
Prophylaxis (i.e. to prevent infection) in those who previously had rheumatic heart disease or are undergoing dental procedures, vaginal hysterectomies, or C-sections.[2] It is also used in pregnant woman who are carriers of group B streptococci to prevent early-onset neonatal infections.[2]
Respiratory infections, including bronchitis, pharyngitis[8]
Sinusitis
Sepsis[11]
Whooping cough, to prevent and treat secondary infections[2]
Ampicillin used to also be used to treat gonorrhea, but there are now too many strains resistant to penicillins.[2]
Bacteria
Ampicillin is used to treat infections by many Gram-positive and Gram-negative bacteria. It was the first "broad spectrum" penicillin with activity against Gram-positive bacteria, including Streptococcus pneumoniae, Streptococcus pyogenes, some isolates of Staphylococcus aureus (but not penicillin-resistant or methicillin-resistant strains), Trueperella, and some Enterococcus. It is one of the few antibiotics that works against multidrug resistant Enterococcus faecalis and E. faecium.[12] Activity against Gram-negative bacteria includes Neisseria meningitidis, some Haemophilus influenzae, and some of the Enterobacteriaceae (though most Enterobacteriaceae and Pseudomonas are resistant).[12][13] Its spectrum of activity is enhanced by co-administration of sulbactam, a drug that inhibits beta lactamase, an enzyme produced by bacteria to inactivate ampicillin and related antibiotics.[14][15] It is sometimes used in combination with other antibiotics that have different mechanisms of action, like vancomycin, linezolid, daptomycin, and tigecycline.[16][17]
Available forms
Ampicillin can be administered by mouth, an intramuscular injection (shot) or by intravenous infusion.[2] The oral form, available as capsules or oral suspensions, is not given as an initial treatment for severe infections, but rather as a follow-up to an IM or IV injection.[2] For IV and IM injections, ampicillin is kept as a powder that must be reconstituted.[18]
IV injections must be given slowly, as rapid IV injections can lead to convulsive seizures.[2][19]
Specific populations
Ampicillin is one of the most commonly used drugs in pregnancy,[20] and has been found to be generally harmless both by the Food and Drug Administration in the U.S. (which classified it as category B) and the Therapeutic Goods Administration in Australia (which classified it as category A).[2][21] It is the drug of choice for treating Listeria monocytogenes in pregnant women, either alone or combined with an aminoglycoside.[2] Pregnancy increases the clearance of ampicillin by up to 50%, and a higher dose is thus needed to reach therapeutic levels.[20][22]
Ampicillin crosses the placenta and remains in the amniotic fluid at 50–100% of the concentration in maternal plasma; this can lead to high concentrations of ampicillin in the newborn.[22]
While lactating mothers secrete some ampicillin into their breast milk, the amount is minimal.[2][20]
In newborns, ampicillin has a longer half-life and lower plasma protein binding.[23] The clearance by the kidneys is lower, as kidney function has not fully developed.[2]
Contraindications
Ampicillin is contraindicated in those with a hypersensitivity to penicillins, as they can cause fatal anaphylactic reactions. Hypersensitivity reactions can include frequent skin rashes and hives, exfoliative dermatitis, erythema multiforme, and a temporary decrease in both red and white blood cells.[8]
Ampicillin is not recommended in people with concurrent mononucleosis, as over 40% of patients develop a skin rash.[8]
Side effects
Ampicillin is comparatively less toxic than other antibiotics, and side effects are more likely in those who are sensitive to penicillins and those with a history of asthma or allergies.[8] In very rare cases, it causes severe side effects such as angioedema, anaphylaxis, and C. difficile infection (that can range from mild diarrhea to serious pseudomembranous colitis).[8] Some develop black "furry" tongue. Serious adverse effects also include seizures and serum sickness. The most common side effects, experienced by about 10% of users are diarrhea and rash. Less common side effects can be nausea, vomiting, itching, and blood dyscrasias. The gastrointestinal effects, such as hairy tongue, nausea, vomiting, diarrhea, and colitis, are more common with the oral form of penicillin.[8] Other conditions may develop up several weeks after treatment.[2]
Overdose
Ampicillin overdose can cause behavioral changes, confusion, blackouts, and convulsions, as well as neuromuscular hypersensitivity, electrolyte imbalance, and renal failure.[8]
Interactions
Ampicillin reacts with probenecid and methotrexate to decrease renal excretion. Large doses of ampicillin can increase the risk of bleeding with concurrent use of warfarin and other oral anticoagulants, possibly by inhibiting platelet aggregation.[24] Ampicillin has been said to make oral contraceptives less effective,[2] but this has been disputed.[25] It can be made less effective by other antibiotic, such as chloramphenicol, erythromycin, cephalosporins, and tetracyclines.[18] For example, tetracyclines inhibit protein synthesis in bacteria, reducing the target against which ampicillin acts.[26] If given at the same time as aminoglycosides, it can bind to it and inactivate it. When administered separately, aminoglycosides and ampicillin can potentiate each other instead.[2][27]
Ampicillin causes skin rashes more often when given with allopurinol.[8]
Both the liver cholera vaccine and live typhoid vaccine can be made ineffective if given with ampicillin. Ampicillin is normally used to treat cholera and typhoid fever, lowering the immunological response that the body has to mount.[28][29][30]
Pharmacology
Mechanism of action
The amino group (highlighted in magenta) is present on ampicillin but not penicillin G.
Ampicillin is in the penicillin group of beta-lactam antibiotics and is part of the aminopenicillin family. It is roughly equivalent to amoxicillin in terms of activity.[2] Ampicillin is able to penetrate Gram-positive and some Gram-negative bacteria. It differs from penicillin G, or benzylpenicillin, only by the presence of an amino group. This amino group, present on both ampicillin and amoxicillin, helps these antibiotics pass through the pores of the outer membrane of Gram-negative bacteria, such as E. coli, Proteus mirabilis, Salmonella enterica, and Shigella.[14][31]
Ampicillin acts as an irreversible inhibitor of the enzyme transpeptidase, which is needed by bacteria to make the cell wall.[2] It inhibits the third and final stage of bacterial cell wall synthesis in binary fission, which ultimately leads to cell lysis; therefore, ampicillin is usually bacteriolytic.[2][32]
Pharmacokinetics
Ampicillin is well-absorbed from the GI tract (though food reduces its absorption), and reaches peak concentrations in one to two hours.The bioavailability is around 62% for parenteral routes. Unlike other penicillins, which usually have bind 60–90% to plasma proteins, ampicillin binds to only 15–20%.[2][23]
Ampicillin is distributed through most tissues, though it is concentrated in the liver and kidneys. It can also be found in the cerebrospinal fluid when the meninges become inflamed (such as, for example, meningitis).[23] Some ampicillin is metabolized by hydrolyzing the beta-lactam ring to penicilloic acid,[2] though most of it is excreted unchanged.[8] In the kidneys, it is filtered out mostly by tubular secretion; some also undergoes glomerular filtration, and the rest is excreted in the feces and bile.
Hetacillin and pivampicillin are ampicillin esters that have been developed to increase bioavailability.[33]
History
Ampicillin has been used extensively to treat bacterial infections since 1961.[34] Until the introduction of ampicillin by the British company Beecham, penicillin therapies had only been effective against Gram-positive organisms such as staphylococci and streptococci.[32] Ampicillin (originally branded as "Penbritin") also demonstrated activity against Gram-negative organisms such as H. influenzae, coliforms, and Proteus spp.[34]
Cost
As of 2014[update], ampicillin's wholesale cost is between US$0.13 and 1.20 for a vial of the intravenous solution.[7] In the United States, it is available as a generic medication: 10 days of treatment cost about $13.[2]
Veterinary use
In veterinary medicine, ampicillin is used in cats, dogs, and farm animals to treat:[11]
Anal gland infections
Cutaneous infections, such as abscesses, cellulitis, and pustular dermatitis
E. coli and Salmonella infections in cattle, sheep, and goats (oral form). Ampicillin use for this purpose had declined as bacterial resistance has increased.[33]
Mastitis in sows[35]
Mixed aerobic–anaerobic infections, such as from cat bites[33]
Multidrug-resistant Enterococcus faecalis and E. faecium[12]
Prophylactic use in poultry against Salmonella and sepsis from E. coli or Staphylococcus aureus[33]
Respiratory tract infections, including tonsilitis, bovine respiratory disease, shipping fever, bronchopneumonia, and calf and bovine pneumonia
Urinary tract infections in dogs
Horses are generally not treated with ampicillin, as they have low bioavailability of beta-lactams.[12]
The half-life in animals is around that same of that in humans (just over an hour). Oral absorption is less than 50% in cats and dogs, and less than 4% in horses.[13]
See also
Amoxycillin (p-hydroxy metabolite of ampicillin)
Pivampicillin (special pro-drug of ampicillin)
Azlocillin and pirbenicillin (urea and amide made from ampicillin)
References
^Drugs.com International trade names for Ampicillin Archived 16 February 2016 at the Wayback Machine. Retrieved 14 January 2015
^ abcdefghijklmnopqrstuvwxyzaaabac"Ampicillin". The American Society of Health-System Pharmacists. Archived from the original on 12 July 2015. Retrieved 1 August 2015..mw-parser-output cite.citationfont-style:inherit.mw-parser-output qquotes:"""""""'""'".mw-parser-output code.cs1-codecolor:inherit;background:inherit;border:inherit;padding:inherit.mw-parser-output .cs1-lock-free abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .cs1-lock-subscription abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registrationcolor:#555.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration spanborder-bottom:1px dotted;cursor:help.mw-parser-output .cs1-hidden-errordisplay:none;font-size:100%.mw-parser-output .cs1-visible-errorfont-size:100%.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-formatfont-size:95%.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-leftpadding-left:0.2em.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-rightpadding-right:0.2em
^"Ampicillin use while Breastfeeding". March 2015. Archived from the original on 23 September 2015. Retrieved 1 August 2015.
^Fischer, Janos; Ganellin, C. Robin (2006). Analogue-based Drug Discovery. John Wiley & Sons. p. 490. ISBN 9783527607495. Archived from the original on 20 December 2016.
^Ravina, Enrique (2011). The evolution of drug discovery : from traditional medicines to modern drugs (1 ed.). Weinheim: Wiley-VCH. p. 262. ISBN 9783527326693. Archived from the original on 9 August 2016.
^"WHO Model List of Essential Medicines (19th List)" (PDF). World Health Organization. April 2015. Archived (PDF) from the original on 13 December 2016. Retrieved 8 December 2016.
^ ab"Ampicillin". International Drug Price Indicator Guide. Archived from the original on 5 March 2017. Retrieved 1 August 2015.
^ abcdefghijklUS National Library of Medicine. "AMPICILLIN – ampicillin sodium injection, powder, for solution". DailyMed. Retrieved 21 August 2017.
^WebMD. "ampicillin (Rx)". Medscape. Retrieved 22 August 2017.
^Finberg, Robert; Fingeroth, Joyce (2012). "Chapter 132: Infections in Transplant Recipients". In Longo, Dan; Fauci, Anthony; Kasper, Dennis; Hauser, Stephen; Jameson, J.; Loscalzo, Joseph. Harrison's Principles of Internal Medicine: Volume 1 (18th ed.). McGraw-Hill Medical. ISBN 978-0-07-174887-2.
^ abUS National Library of Medicine. "Ampicilin – ampicillin injection, powder, for suspension". DailyMed. Retrieved 21 August 2017.
^ abcdMagdesian, K. Gary (2017). Equine Pharmacology, an Issue of Veterinary Clinics of North America: Equine Practice, E-Book. Elsevier Health Sciences. p. 59. ISBN 978-0-323-52438-4.
^ abPapich, Mark G. (2015). Saunders Handbook of Veterinary Drugs: Small and Large Animal. Elsevier Health Sciences. pp. 43–47. ISBN 978-0-323-24485-5.
^ abHauser, Alan R. (2012). Antibiotic Basics for Clinicians: The ABCs of Choosing the Right Antibacterial Agent. Lippincott Williams & Wilkins. pp. 25–28. ISBN 978-1-4511-1221-4.
^Suleyman, G; Zervos, MJ (2016). "Safety and efficacy of commonly used antimicrobial agents in the treatment of enterococcal infections: a review". Expert opinion on drug safety. 15 (2): 153–67. doi:10.1517/14740338.2016.1127349. PMID 26629598.
^Torok, M. Estee; Moran, Ed; Cooke, Fiona. Oxford Handbook of Infectious Diseases and Microbiology. Oxford University Press. p. 721. ISBN 9780191503108. Archived from the original on 23 March 2017.
^ abWanamaker, Boyce P.; Massey, Kathy (2014). Applied Pharmacology for Veterinary Technicians - E-Book. Elsevier Health Sciences. p. 244. ISBN 978-0-323-29170-5.
^WebMD. "Ampicillin Intravenous: Uses, Side Effects, Interactions, Pictures, Warnings & Dosing". WebMD. Retrieved 23 February 2018.
^ abcWeiner, Carl P.; Rope, Kate (2013). The Complete Guide to Medications During Pregnancy and Breastfeeding: Everything You Need to Know to Make the Best Choices for You and Your Baby. St. Martin's Press. pp. 47–49. ISBN 978-1-250-03720-6.
^Administration, Australian Government Department of Health Therapeutic Goods (25 October 2017). "Prescribing medicines in pregnancy database". Therapeutic Goods Administration (TGA). Australian Government Department of Health. Retrieved 23 February 2018. Note: scroll down to "Seach by name" and type "ampicillin" into the search bar. Requires JavaScript to be enabled.
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^ abcEghianruwa, Kingsley (2014). Essential Drug Data for Rational Therapy in Veterinary Practice. AuthorHouse. p. 26. ISBN 978-1-4918-0010-2.
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^Piscitelli, Stephen C.; Rodvold, Keith A.; Pai, Manjunath P. (2011). Drug Interactions in Infectious Diseases. Springer Science & Business Media. pp. 213–214. ISBN 978-1-61779-213-7.
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^ abPetri (2011). "Penicillins, Cephalosporins, and Other Beta-Lactam Antibiotics". In Brunton, Laurence; Chabner, Bruce; Knollman, Bjorn. Goodman and Gilman's the Pharmacological Basis of Therapeutics, Twelfth Edition (12th ed.). New York: McGraw Hill Professional. pp. 1477–1504. ISBN 978-0-07-176939-6.
^ abcdGiguère, S.; Prescott, John F.; Dowling, Patricia M. (2013). Antimicrobial Therapy in Veterinary Medicine. John Wiley & Sons. pp. 167–170. ISBN 978-1-118-67507-6.
^ abAcred, P; Brown, D. M.; Turner, D. H.; Wilson, M. J. (April 1962). "Pharmacology and chemotherapy of ampicillin--a new broad-spectrum penicillin". Br J Pharmacol Chemother. 18 (2): 356–69. doi:10.1111/j.1476-5381.1962.tb01416.x. PMC 1482127. PMID 13859205.
^Erskine, Ronald. "Mastitis in Sows". Merck Veterinary Manual. Retrieved 22 August 2017.
External links
Ampicillin bound to proteins in the PDB
v
t
e
Antibiotics active on the cell wall and envelope (J01C-J01D)
Intracellular
Inhibit peptidoglycan subunit synthesis and transport: NAM synthesis inhibition (Fosfomycin)
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