U.S. Department of Health & Human Services Divider Arrow National Institutes of Health Divider Arrow NCATS

Details

Stereochemistry ABSOLUTE
Molecular Formula C16H19N3O4S
Molecular Weight 349.405
Optical Activity UNSPECIFIED
Defined Stereocenters 4 / 4
E/Z Centers 0
Charge 0

SHOW SMILES / InChI
Structure of AMPICILLIN

SMILES

[H][C@]12SC(C)(C)[C@@H](N1C(=O)[C@H]2NC(=O)[C@H](N)C3=CC=CC=C3)C(O)=O

InChI

InChIKey=AVKUERGKIZMTKX-NJBDSQKTSA-N
InChI=1S/C16H19N3O4S/c1-16(2)11(15(22)23)19-13(21)10(14(19)24-16)18-12(20)9(17)8-6-4-3-5-7-8/h3-7,9-11,14H,17H2,1-2H3,(H,18,20)(H,22,23)/t9-,10-,11+,14-/m1/s1

HIDE SMILES / InChI

Molecular Formula C16H19N3O4S
Molecular Weight 349.405
Charge 0
Count
MOL RATIO 1 MOL RATIO (average)
Stereochemistry ABSOLUTE
Additional Stereochemistry No
Defined Stereocenters 4 / 4
E/Z Centers 0
Optical Activity UNSPECIFIED

Description

Ampicillin is a penicillin beta-lactam antibiotic. The following gram-negative and gram-positive bacteria have been shown in in vitro studies to be susceptible to ampicillin: Hemolytic and nonhemolytic streptococci, Streptococcus pneumoniae, Nonpenicillinase-producing staphylococci, Clostridium spp., B. anthracis, Listeria monocytogenes, most strains of enterococci, H. influenzae, N. gonorrhoeae, N. meningitidis, Proteus mirabilis, many strains of Salmonella, Shigella, and E. coli. Ampicillin is indicated in the treatment of bacterial meningitis, septicemia, endocarditis, urinary tract, gastrointestinal, respiratory tract infections caused by susceptible strains of the designated organisms.

CNS Activity

Originator

Approval Year

Targets

Primary TargetPharmacologyConditionPotency

Conditions

ConditionModalityTargetsHighest PhaseProduct
Curative
AMPICILLIN SODIUM

Cmax

ValueDoseCo-administeredAnalytePopulation
129.5 μg/mL
2000 mg single, intravenous
AMPICILLIN plasma
Homo sapiens
15.04 μg/mL
1500 mg single, oral
AMPICILLIN plasma
Homo sapiens

AUC

ValueDoseCo-administeredAnalytePopulation
58.74 μg × h/mL
1500 mg single, oral
AMPICILLIN plasma
Homo sapiens

T1/2

ValueDoseCo-administeredAnalytePopulation
1 h
2000 mg single, intravenous
AMPICILLIN plasma
Homo sapiens
1.82 h
1500 mg single, oral
AMPICILLIN plasma
Homo sapiens

Funbound

ValueDoseCo-administeredAnalytePopulation
72%
AMPICILLIN serum
Homo sapiens

Doses

AEs

OverviewOther

Other InhibitorOther SubstrateOther Inducer



Drug as perpetrator​

PubMed

Patents

Sample Use Guides

In Vivo Use Guide
Ampicillin Dosage and Administration This insert is for a Pharmacy Bulk Package and is intended for preparing IV admixtures only. Dosage recommendations for intramuscular or direct intravenous injection are for informational purposes only. Infections of the respiratory tract and soft tissues. Patients weighing 40 kg (88 lbs) or more: 250 to 500 mg every 6 hours. Patients weighing less than 40 kg (88 lbs): 25 to 50 mg/kg/day in equally divided doses at 6- to 8- hour intervals. Infections of the gastrointestinal and genitourinary tracts (including those caused by Neisseria gonorrhoeae in females). Patients weighing 40 kg (88 lbs) or more: 500 mg every 6 hours. Patients weighing less than 40 kg (88 lbs): 50 mg/kg/day in equally divided doses at 6- to 8- hour intervals. In the treatment of chronic urinary tract and intestinal infections, frequent bacteriological and clinical appraisal is necessary. Smaller doses than those recommended above should not be used. Higher doses should be used for stubborn or severe infections. In stubborn infections, therapy may be required for several weeks. It may be necessary to continue clinical and/or bacteriological follow-up for several months after cessation of therapy. Urethritis in males due to N. gonorrhoeae. Adults – Two doses of 500 mg each at an interval of 8 to 12 hours. Treatment may be repeated if necessary or extended if required. In the treatment of complications of gonorrheal urethritis, such as prostatitis and epididymitis, prolonged and intensive therapy is recommended. Cases of gonorrhea with a suspected primary lesion of syphilis should have darkfield examinations before receiving treatment. In all other cases where concomitant syphilis is suspected, monthly serological tests should be made for a minimum of four months. The doses for the preceding infections may be given by either the intramuscular or intravenous route. A change to oral Ampicillin may be made when appropriate. Bacterial Meningitis Adults and children – 150 to 200 mg/kg/day in equally divided doses every 3 to 4 hours. (Treatment may be initiated with intravenous drip therapy and continued with intramuscular injections.) The doses for other infections may be given by either the intravenous or intramuscular route. Septicemia Adults and children – 150 to 200 mg/kg/day. Start with intravenous administration for at least three days and continue with the intramuscular route every 3 to 4 hours. Treatment of all infections should be continued for a minimum of 48 to 72 hours beyond the time that the patient becomes asymptomatic or evidence of bacterial eradication has been obtained. A minimum of 10-days treatment is recommended for any infection caused by Group A beta-hemolytic streptococci to help prevent the occurrence of acute rheumatic fever or acute glomerulonephritis.
Route of Administration: Other
In Vitro Use Guide
Ampicillin was tested in vitro for antibacterial activity against 673 clinical isolates of Gram-negative bacilli and Streptococcus faecalis. Taking the group of 673 isolates tested as a whole, 448 (67 %) were inhibited by ampicillin at a concentration of 5 ug/ml.
Substance Class Chemical
Record UNII
7C782967RD
Record Status Validated (UNII)
Record Version