Carbenicillin Indanyl Sodium
Class: Extended-spectrum Penicillins
Chemical Name: [2S - (2α,5α,6β)] - 6 - [[3 - [(2,3 - dihydro - 1H - inden - 5 - yl)oxy] - 1,3 - dioxo - 2 - phenylpropyl] - amino] - 3,3 - dimethyl - 7 - oxo - 4 - thia - 1 - azabicyclo[3.2.O]heptane - 2 - carboxylic acid monosodium salt
CAS Number: 26605-69-6
Uses for Carbenicillin Indanyl Sodium
Urinary Tract Infections (UTIs)
Treatment of acute or chronic infections of the upper and lower urinary tract or for asymptomatic bacteriuria caused by susceptible enterococci, Enterobacter, Escherichia coli, Morganella morganii, Proteus mirabilis, P. vulgaris, Providencia rettgeri, Pseudomonas, or enterococci.1 2 4 12 27 28 29 30 33
Not a drug of choice for these UTIs.2 4 33 Because only low carbenicillin concentrations are attained in urine and renal parenchyma in patients with severe renal impairment, the drug may be ineffective for treatment of UTIs in patients with Clcr <10 mL/minute.11
Carbenicillin Indanyl Sodium Dosage and Administration
Available as carbenicillin indanyl sodium; dosage expressed in terms of carbenicillin.1
Urinary Tract Infections (UTIs)
UTIs Caused by Enterobacter, E. coli, or ProteusOral
UTIs Caused by Pseudomonas or EnterococcusOral
No dosage adjustments except those related to renal impairment. (See Renal Impairment under Dosage and Administration.)
Cautions for Carbenicillin Indanyl Sodium
Known hypersensitivity to any penicillin.1
Serious and occasionally fatal hypersensitivity reactions (including anaphylaxis) reported with penicillins.1 Anaphylaxis occurs most frequently with parenteral penicillins but has occurred with oral penicillins.1
Prior to initiation of therapy, make careful inquiry regarding previous hypersensitivity reactions to penicillins, cephalosporins, or other drugs.1 Partial cross-allergenicity occurs among penicillins and other β-lactam antibiotics including cephalosporins and cephamycins.1 19 20 21 22
If hypersensitivity reaction occurs, discontinue immediately and institute appropriate therapy as indicated (e.g., epinephrine, corticosteroids, maintenance of an adequate airway and oxygen).1
Periodically assess organ system functions, including renal, hepatic, and hematopoietic, during prolonged therapy.1
Selection and Use of Anti-infectives
To reduce development of drug-resistant bacteria and maintain effectiveness of carbenicillin and other antibacterials, use only for treatment or prevention of infections proven or strongly suspected to be caused by susceptible bacteria.a
When selecting or modifying anti-infective therapy, use results of culture and in vitro susceptibility testing.a In the absence of such data, consider local epidemiology and susceptibility patterns when selecting anti-infectives for empiric therapy.a
Coombs’ Test Results
Each tablet of carbenicillin indanyl sodium containing 382 mg of carbenicillin contains 23 mg of sodium.1
Safety and efficacy not established in pediatric patients.1
Serum concentrations of extended-spectrum penicillins may be increased and half-life prolonged in patients with hepatic impairment.b
Dosage adjustment may be necessary in patients with Clcr 10–20 mL/minute to prevent accumulation of the drug.1
Should not be used in patients with severe renal impairment (i.e., Clcr <10 mL/minute) since these patients will not achieve therapeutic concentrations in urine.1
Common Adverse Effects
Interactions for Carbenicillin Indanyl Sodium
Specific Drugs and Laboratory Tests
Drug or Test
Some in vitro evidence of additive or synergistic antibacterial effects with extended-spectrum penicillins against some Enterobacteriaceae or Pseudomonas aeruginosa;b synergism is unpredictable and antagonism has been reported rarelyb
Some in vitro evidence of additive or partially synergistic antibacterial effects with other β-lactam antibiotics (e.g., cephalosporins, cephamycins);b synergism is unpredictable and indifference or antagonism has been reported more frequently than synergismb
Possible decreased renal clearance of methotrexate and increased risk of methotrexate adverse effectsb
Patients receiving penicillins and methotrexate concomitantly should be monitored carefullyb
Tests for glucose
Possible false-positive reactions in urine glucose tests using Clinitest, Benedict’s solution, or Fehling’s solutionb
Use glucose tests based on enzymatic glucose oxidase reactions (e.g., Clinistix, Tes-Tape)b
Tests for uric acid
Carbenicillin Indanyl Sodium Pharmacokinetics
After absorption, carbenicillin indanyl sodium is rapidly and completely hydrolyzed to carbenicillin and indanol.2 5 8 13 Peak serum concentrations of carbenicillin generally attained within 0.5–2 hours.1 12 14 15
Plasma Protein Binding
Serum concentrations of extended-spectrum penicillins may be increased and half-life prolonged in patients with hepatic impairment.b In patients with both renal and hepatic impairment, serum half-life of carbenicillin may range up to 32 hours.b
Serum half-life ranges from 9.4–23.4 hours in patients with Clcr <10 mL/minute per 1.73 m2.b
Actions and Spectrum
Based on spectrum of activity, classified as an extended-spectrum penicillin.3 6 More active against gram-negative bacilli than natural penicillins, penicillinase-resistant penicillins, and aminopenicillins.b
Available as the sodium salt of the indanyl ester of carbenicillin.1 8 Carbenicillin indanyl sodium is rapidly hydrolyzed to carbenicillin in vivo;1 2 3 5 6 8 13 18 the antibacterial activity of the ester is not clinically important.2 6 18
Gram-negative aerobes: active in vitro against Enterobacter, Escherichia coli, Proteus mirabilis, P. vulgaris, Morganella morganii, Providencia rettgeri, and Pseudomonas.1 b Klebsiella usually are resistant;1 b resistance has been reported in Pseudomonas.1 b
Complete cross-resistance generally occurs between carbenicillin and ticarcillin.b
Advice to Patients
Advise patients that antibacterials (including carbenicillin) should only be used to treat bacterial infections and not used to treat viral infections (e.g., the common cold).a
Importance of completing full course of therapy, even if feeling better after a few days.a
Advise patients that skipping doses or not completing the full course of therapy may decrease effectiveness and increase the likelihood that bacteria will develop resistance and will not be treatable with carbenicillin or other antibacterials in the future.a
Importance of discontinuing therapy and informing clinician if an allergic reaction occurs.a
Importance of informing clinicians of existing or contemplated concomitant therapy, including prescription and OTC drugs.1
Importance of women informing clinician if they are or plan to become pregnant or plan to breast-feed.1
Importance of informing patients of other important precautionary information. (See Cautions.)
Excipients in commercially available drug preparations may have clinically important effects in some individuals; consult specific product labeling for details.
Please refer to the ASHP Drug Shortages Resource Center for information on shortages of one or more of these preparations.
382 mg (of carbenicillin)
AHFS DI Essentials. © Copyright, 2016, American Society of Health-System Pharmacists, Inc., 7272 Wisconsin Avenue, Bethesda, Maryland 20814.
Date published: May 01, 2004
Last reviewed: May 01, 2004
Date modified: February 08, 2016
1. Pfizer. Geocillin (carbenicillin indanyl sodium) tablets prescribing information. In: Physician’s desk reference. 57th ed. Montvale, NJ: Medical Economics Company Inc; 2003:2600-1.
2. Kucers A, Crowe S, Grayson ML et al, eds. The use of antibiotics. A clinical review of antibacterial, antifungal, and antiviral drugs. 5th ed. Jordan Hill, Oxford: Butterworth-Heinemann; 1997: 145-61.
3. Rolinson GN, Sutherland R. Semisynthetic penicillins. Adv Pharmacol Chemother. 1973; 11:152-220.
4. Barza M. Antimicrobial spectrum, pharmacology and therapeutic use of antibiotics. Part 2: penicillins. Am J Hosp Pharm. 1977; 34:57-67. [PubMed 318800]
5. Wolff ME, ed. Burger’s medicinal chemistry. 4th ed. New York: John Wiley & Sons; 1980:84-157.
6. Butler K, English AR, Ray VA et al. Carbenicillin: chemistry and mode of action. J Infect Dis. 1970; 122(Suppl):S1-8. [PubMed 4248289]
7. Neu HC. Carbenicillin and ticarcillin. Med Clin North Am. 1982; 66:61-77. [PubMed 7038341]
8. Butler AR, English B, Gralla E et al. Indanyl carbenicillin: chemistry and laboratory studies with a new semisynthetic penicillin. J Infect Dis. 1973; 127(Suppl):S97-104. [PubMed 4571995]
9. Barza M, Weinstein L. Pharmacokinetics of the penicillins in man. Clin Pharmacokinet. 1976; 1:297-308. [PubMed 797501]
10. Selwyn S. Applied pharmacology, adverse effects and drug interactions. In: Selwyn S, ed. The beta-lactam antibiotics: penicillins and cephalosporins in perspective. London: Hodder and Stoughton; 1980:91-126.
11. Cox CE. Pharmacology of carbenicillin indanyl sodium in renal insufficiency. J Infect Dis. 1973; 127(Suppl):S157-62. [PubMed 4695480]
12. Turck M. The treatment of urinary-tract infections with an oral carbenicillin. J Infect Dis. 1973; 127(Suppl):S133-4.
13. Knirsch AK, Hobbs DC, Korst JJ. Pharmacokinetics, toleration, and safety of indanyl carbenicillin in man. J Infect Dis. 1973; 127(Suppl):S105-8. [PubMed 4695476]
14. Fabre J, Burgy C, Rudhardt M et al. The behaviour in man of C.P. 15,464, a carbenicillin absorbed following oral administration. Chemotherapy. 1972; 17:334-43. [PubMed 4669556]
15. Bran JL, Karl DM, Kaye D. Human pharmacology and clinical evaluation of an oral carbenicillin preparation. Clin Pharmacol Ther. 1971; 12:525-30. [PubMed 5208911]
16. Libke RD, Clarke JT, Ralph ED et al. Ticarcillin vs carbenicillin: clinical pharmacokinetics. Clin Pharmacol Ther. 1975; 17:441-6. [PubMed 1122685]
17. Nakano H, Saski K, Mizoguchi M et al. Absorption and excretion of carbenicillin indanyl sodium in patients with reduced kidney function. Chemotherapy. 1977; 23:299-308. [PubMed 578496]
18. Martin AR. Antibiotics. In: Doerge RF, ed. Wilson and Gisvold’s textbook of organic medicinal and pharmaceutical chemistry. 8th ed. Philadelphia: JB Lippincott Company; 1982:228-47.
19. Idsoe O, Guthe T, Willcox RR et al. Nature and extent of penicillin side-reactions, with particular reference to fatalities from anaphylactic shock. Bull World Health Organ. 1968; 38:159-88. [PubMed 5302296]
20. Erffmeyer JE. Adverse reactions to penicillin. Ann Allergy. 1981; 47:288-300. [PubMed 6171185]
21. Isbister JP. Penicillin allergy: a review of the immunological and clinical aspects. Med J Aust. 1971; 1:1067-74. [PubMed 4398272]
22. Sullivan TJ, Wedner HJ, Shatz GS et al. Skin testing to detect penicillin allergy. J Allergy Clin Immunol. 1981; 68:171-80. [IDIS 140792] [PubMed 6267115]
23. Mobley DF. Bacterial prostatitis: treatment with carbenicillin indanyl sodium. Invest Urol. 1981; 19:31-3. [IDIS 134873] [PubMed 7019153]
24. Oliveri RA, Sachs RM, Caste PG. Clinical experience with geocillin in the treatment of bacterial prostatitis. Curr Ther Res Clin Exp. 1979; 25:415-21.
25. Eichenwald HF, McCracken GH. Antimicrobial therapy in infants and children. Part I. Review of antimicrobial agents. J Pediatr. 1978; 93:336-56.
26. Ries KM, Cobbs GC, Gillenwater JY et al. Comparison of carbenicillin idanyl sodium, ampicillin, and cephaloglycin in treatment of urinary-tract infection. J Infect Dis. 1973; 127(Suppl):S148-53. [PubMed 4695479]
27. Baker DA, Andriole VT. The treatment of difficult urinary-tract infections with carbenicillin indanyl sodium. J Infect Dis. 1973; 127(Suppl):S136-42. [PubMed 4714084]
28. Holloway WJ, Taylor WA. Long-term oral carbenicillin therapy in complicated urinary-tract infections. J Infect Dis. 1973; 127(Suppl):S143-7. [PubMed 4576799]
29. Westenfelder M, Madsen PO. Ambulatory treatment of chronic urinary-tract infections in elderly males: a comparative study of three oral antibiotics. J Infect Dis. 1973; 127(Suppl):S154-6. [PubMed 4714085]
30. Jabbar A, Nahid M, Nasir A et al. Use of oral carbenicillin in urinary tract infection. Curr Ther Res Clin Exp. 1978; 23:22-6.
31. Crawford ED, Haynes AL, Story MW et al. Prevention of urinary tract infection and sepsis following transrectal prostatic biopsy. J Urol. 1982; 127:449-51. [IDIS 148340] [PubMed 6895918]
32. Fang LS, Tolkoff-Rubin NE, Rubin RH. Clinical management of urinary tract infection. Pharmacotherapy. 1982; 2:91-9. [IDIS 150331] [PubMed 6765394]
33. Anon. The choice of antibacterial drugs. Med Lett Drugs Ther. 2001; 43:69-78. [PubMed 11518876]
34. National Committee for Clinical Laboratory Standards. MIC testing supplemental tables; M100-S13 (M7). Wayne, PA:NCCLS; 2003 Jan.
35. National Committee for Clinical Laboratory Standards. Disk diffusion supplemental tables; M100-S13 (M2). Wayne, PA:NCCLS; 2003 Jan.
36. American Society Health-System Pharmacists. ASHP therapeutic guidelines on antimicrobial prophylaxis in surgery. Am J Health-Syst Pharm. 1999; 56:1839-88. [PubMed 10511234]
37. Anon. Antimicrobial prophylaxis in surgery. Med Lett Drugs Ther. 2001; 43:92-7. [PubMed 11689761]
38. The United States pharmacopoeia, 26th rev, and The national formulary, 21st ed. Rockville, MD: The United States Pharmacopeial Convention, Inc; 2003:326-7,2552.
39. Roerig. Product information summary on Geocillin (carbenicillin indanyl sodium). New York; 1972 Nov.
a. Pfizer. Geocillin (carbenicillin indanyl sodium) tablets prescribing information. New York, NY; 2003 Sept.
b. AHFS Drug Information 2004. McEvoy GK, ed. Extended-spectrum Penicillins General Statement. American Society of Health-System Pharmacists; 2004:341-9.