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Side Effects & Adverse Reactions
SERIOUS AND OCCASIONALLY FATAL HYPERSENSITIVITY (ANAPHYLACTIC/ANAPHYLACTOID) REACTIONS HAVE BEEN REPORTED IN PATIENTS ON PENICILLIN THERAPY. THESE REACTIONS ARE MORE LIKELY TO OCCUR IN INDIVIDUALS WITH A HISTORY OF PENICILLIN HYPERSENSITIVITY AND/OR A HISTORY OF SENSITIVITY TO MULTIPLE ALLERGENS. THERE HAVE BEEN REPORTS OF INDIVIDUALS WITH A HISTORY OF PENICILLIN HYPERSENSITIVITY WHO HAVE EXPERIENCED SEVERE REACTIONS WHEN TREATED WITH CEPHALOSPORINS. BEFORE INITIATING THERAPY WITH PIPRACIL, CAREFUL INQUIRY SHOULD BE MADE CONCERNING PREVIOUS HYPERSENSITIVITY REACTIONS TO PENICILLINS, CEPHALOSPORINS OR OTHER ALLERGENS. IF AN ALLERGIC REACTION OCCURS, PIPRACIL SHOULD BE DISCONTINUED AND APPROPRIATE THERAPY INSTITUTED. SERIOUS ANAPHYLACTIC/ANAPHYLACTOID REACTIONS REQUIRE IMMEDIATE EMERGENCY TREATMENT WITH EPINEPHRINE. OXYGEN, INTRAVENOUS STEROIDS AND AIRWAY MANAGEMENT, INCLUDING INTUBATION, SHOULD ALSO BE ADMINISTERED AS INDICATED.
Clostridium difficile associated diarrhea (CDAD) has been reported with use of nearly all antibacterial agents, including PIPRACIL, and may range in severity from mild diarrhea to fatal colitis. Treatment with antibacterial agents alters the normal flora of the colon leading to overgrowth of C. difficile.
C. difficile produces toxins A and B which contribute to the development of CDAD. Hypertoxin producing strains of C. difficile cause increased morbidity and mortality, as these infections can be refractory to antimicrobial therapy and may require colectomy. CDAD must be considered in all patients who present with diarrhea following antibiotic use. Careful medical history is necessary since CDAD has been reported to occur over two months after the administration of antibacterial agents.
If CDAD is suspected or confirmed, ongoing antibiotic use not directed against C. difficile may need to be discontinued. Appropriate fluid and electrolyte management, protein supplementation, antibiotic treatment of C. difficile, and surgical evaluation should be instituted as clinically indicated.
Legal Issues
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FDA Safety Alerts
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Manufacturer Warnings
There is currently no manufacturer warning information available for this drug.
FDA Labeling Changes
There are currently no FDA labeling changes available for this drug.
Uses
Therapeutic: PIPRACIL is indicated for the treatment of serious infections caused by susceptible strains of the designated microorganisms in the conditions listed below:
Intra-Abdominal Infections including hepatobiliary and surgical infections caused by E. coli, Pseudomonas aeruginosa, enterococci, Clostridium spp., anaerobic cocci, or Bacteroides spp., including B. fragilis.
Urinary Tract Infections caused by E. coli, Klebsiella spp., P. aeruginosa, Proteus spp., including P. mirabilis, or enterococci.
Gynecologic Infections including endometritis, pelvic inflammatory disease, pelvic cellulitis caused by Bacteroides spp., including B. fragilis, anaerobic cocci, Neisseria gonorrhoeae, or enterococci (E. faecalis).
Septicemia including bacteremia caused by E. coli, Klebsiella spp., Enterobacter spp., Serratia spp., P. mirabilis, S. pneumoniae, enterococci, P. aeruginosa, Bacteroides spp., or anaerobic cocci.
Lower RespiratoryTract Infections caused by E. coli, Klebsiella spp., Enterobacter spp., P. aeruginosa, Serratia spp., H. influenzae, Bacteroides spp., or anaerobic cocci. Although improvement has been noted in patients with cystic fibrosis, lasting bacterial eradication may not necessarily be achieved.
Skin and Skin Structure Infections caused by E. coli, Klebsiella spp., Serratia spp., Acinetobacter spp., Enterobacter spp., P. aeruginosa, Morganella morganii, Providencia rettgeri, Proteus vulgaris, P. mirabilis, Bacteroides spp., including B. fragilis, anaerobic cocci, or enterococci.
Bone and Joint Infections caused by P. aeruginosa, enterococci, Bacteroides spp., or anaerobic cocci.
Uncomplicated Gonococcal Urethritis caused by N. gonorrhoeae.
PIPRACIL has also been shown to be clinically effective for the treatment of infections at various sites caused by Streptococcus species including S. pyogenes and S. pneumoniae; however, infections caused by these organisms are ordinarily treated with more narrow spectrum penicillins. Because of its broad spectrum of bactericidal activity against gram-positive and gram-negative aerobic and anaerobic bacteria, PIPRACIL is particularly useful for the treatment of mixed infections and presumptive therapy prior to the identification of the causative organisms.
Also, PIPRACIL may be administered as single drug therapy in some situations where normally two antibiotics might be employed.
Piperacillin has been successfully used with aminoglycosides, especially in patients with impaired host defenses. Both drugs should be used in full therapeutic doses.
Appropriate cultures should be made for susceptibility testing before initiating therapy and therapy adjusted, if appropriate, once the results are known.
Prophylaxis: PIPRACIL is indicated for prophylactic use in surgery including intra-abdominal (gastrointestinal and biliary) procedures, vaginal hysterectomy, abdominal hysterectomy, and cesarean section. Effective prophylactic use depends on the time of administration; PIPRACIL should be given one-half to one hour before the operation so that effective levels can be achieved in the site prior to the procedure.
The prophylactic use of piperacillin should be stopped within 24 hours, since continuing administration of any antibiotic increases the possibility of adverse reactions, but in the majority of surgical procedures, does not reduce the incidence of subsequent infections. If there are signs of infection, specimens for culture and susceptibility testing should be obtained for identification of the causative microorganism so that appropriate therapy can be instituted.
To reduce the development of drug-resistant bacteria and maintain the effectiveness of PIPRACIL and other antibacterial drugs, PIPRACILshould only be used to treat or prevent infections that are proven or strongly suspected to be caused by susceptible bacteria. When culture and susceptibility information are available, they should be considered in selecting or modifying antibacterial therapy. In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy.
History
There is currently no drug history available for this drug.
Other Information
PIPRACIL, sterile piperacillin sodium, is a semisynthetic broad-spectrum penicillin for parenteral use derived from D(-)-α-aminobenzylpenicillin. The chemical name of piperacillin sodium is sodium (2S,5R,6R)-6-[(R)-2-(4-ethyl-2,3-dioxo-1-piperazinecarboxamido)-2-phenylacetamido]-3,-3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate. The chemical formula is C23H26N5NaO7S, and the molecular weight is 539.54. Its structural formula is:
Piperacillin sodium powder is a white to off-white solid having the characteristic appearance of products prepared by freeze-drying. It is freely soluble in water and in alcohol. The pH of an aqueous solution containing 400 milligrams per milliliter ranges from 5.5 to 7.5. One g contains 1.85 mEq (42.5 mg) of sodium (Na+).
Sources
Pipracil Manufacturers
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Wyeth Pharmaceuticals, Inc.
Pipracil | Wyeth Pharmaceuticals, Inc.
PIPRACIL may be administered by the intramuscular route (see NOTE) or intravenously as a three- to five-minute intravenous injection or as a 20- to 30-minute infusion. The usual dosage of PIPRACIL for serious infections is 3 to 4 g given every four to six hours as a 20- to 30-minute infusion. For serious infections, the intravenous route should be used.
PIPRACIL should not be mixed with an aminoglycoside in a syringe or infusion bottle since this can result in inactivation of the aminoglycoside.
The maximum daily dose for adults is usually 24 g/day, although higher doses have been used.
Intramuscular injections (see NOTE) should be limited to 2 g per injection site. This route of administration has been used primarily in the treatment of patients with uncomplicated gonorrhea and urinary tract infections.
DOSAGE RECOMMENDATIONS Type of Infection Usual Total Daily Dose†One g of probenecid should be given orally one-half hour prior to injection.
Serious infections such as septicemia, nosocomial pneumonia, intra-abdominal infections, aerobic and anaerobic gynecologic infections, and skin and soft tissue infections
12 – 18 g/d I.V. (200 – 300 mg/kg/d) in divided doses every 4 to 6 h Complicated urinary tract infections 8 – 16 g/d I.V. (125 – 200 mg/kg/d) in divided doses every 6 to 8 h Uncomplicated urinary tract infections and most community-acquired pneumonia 6 – 8 g/d I.M. or I.V. (100– 125 mg/kg/d) in divided doses every 6 to 12 h Uncomplicated gonorrhea infections 2 g I.M.† as a one-time doseThe average duration of PIPRACIL treatment is from seven to ten days, except in the treatment of gynecologic infections, which is from three to ten days; the duration should be guided by the patient's clinical and bacteriological progress. For most acute infections, treatment should be continued for at least 48 to 72 hours after the patient becomes asymptomatic. Antibiotic therapy for S. pyogenes infections should be maintained for at least ten days to reduce the risk of rheumatic fever.
When PIPRACIL is given concurrently with aminoglycosides, both drugs should be used in full therapeutic doses.
Renal Impairment Dosage in Renal Impairment Creatinine
Clearance
mL/min Urinary Tract
Infection
(uncomplicated) Urinary Tract
Infection
(complicated) Serious
Systemic
Infection >40 No dosage adjustment necessary 20-40 No dosage adjustment necessary 9 g/day
3 g every 8 h 12 g/day
4 g every 8 h <20 6 g/day
3 g every 12 h 6 g/day
3 g every 12 h 8 g/day
4 g every 12 hFor patients on hemodialysis, the maximum daily dose is 6 g/day (2 g every 8 hours). In addition, because hemodialysis removes 30% to 50% of piperacillin in 4 hours, a 1-g additional dose should be administered following each dialysis period.
For patients with renal failure and hepatic insufficiency, measurement of serum levels of piperacillin will provide additional guidance for adjusting dosage.
ProphylaxisWhen possible, PIPRACIL should be administered as a 20- to 30-minute infusion just prior to anesthesia. Administration while the patient is awake will facilitate identification of possible adverse reactions during drug infusion. (See PRECAUTION, Drug Interactions.)
INDICATION 1st Dose 2nd Dose 3rd Dose Intra-abdominal
Surgery 2 g I.V. just prior to surgery 2 g during surgery 2 g every 6 h Post-Op for no more than 24 h Vaginal
Hysterectomy 2 g I.V. just prior to surgery 2 g 6 h after 1st dose 2 g 12 h after 1st dose Cesarean
Section 2 g I.V. after cord is clamped 2 g 4 h after 1st dose 2 g 8 h after 1st dose Abdominal
Hysterectomy 2 g I.V. just prior to surgery 2 g on return to recovery room 2 g after 6 hPediatric patients. Dosages in pediatric patients under 12 years of age have not been studied in adequate and well-controlled clinical trials (See CLINICAL PHARMACOLOGY).
¶Either Parabens or Benzyl Alcohol.
PRODUCT RECONSTITUTION/DOSAGE PREPARATION Conventional Vials: Diluents for Reconstitution Sterile Water for Injection
#For Intramuscular Use Only. Lidocaine is contraindicated in patients with a known history of hypersensitivity to local anesthetics of the amide type.
Bacteriostatic¶ Water for Injection Sodium Chloride Injection
Bacteriostatic¶ Sodium Chloride Injection
Dextrose 5% in Water
Dextrose 5% and 0.9% Sodium Chloride
Lidocaine# HCl 0.5-1% (without epinephrine)††When PIPRACIL®is further diluted with Lactated Ringer's Injection, the diluted solution must be administered within 2 hours.
Conventional Vials: Intravenous Solutions Intravenous Admixtures Dextrose 5% in Water
0.9% Sodium Chloride
Dextrose 5% and 0.9% Sodium Chloride
Lactated Ringer's Injection††
Dextran 6% in 0.9% Sodium Chloride Normal Saline [+ KCl 40 mEq]
5% Dextrose in Water [+ KCl 40 mEq]
5% Dextrose/Normal Saline [+ KCl 40 mEq]
Ringer's Injection [+ KCl 40 mEq]
Lactated Ringer's Injection [+ KCl 40 mEq]†† Intravenous AdministrationReconstitution Directions for Conventional Vials: Reconstitute each gram of PIPRACIL with at least 5 mL of a suitable diluent (except Lidocaine HCl 0.5%-1% without epinephrine) listed above. Shake well until dissolved. Reconstituted solution may be diluted to the desired volume (eg, 50 or 100 mL) in the above listed intravenous solutions and admixtures.
DIRECTIONS FOR ADMINISTRATION
Intermittent IV Infusion
Infuse diluted solution over period of about 30 minutes. During infusion, it is desirable to discontinue the primary intravenous solution.Intravenous Injection (Bolus)
Intramuscular Administration (Conventional Vials Only)
Reconstituted solution should be injected slowly over a 3-to 5-minute period to help avoid vein irritation.Reconstitution Directions:Reconstitute each gram of PIPRACIL with 2 mL of a suitable diluent listed above to achieve a concentration of 1 g per 2.5 mL. Shake well until dissolved.
DIRECTIONS FOR ADMINISTRATION
When indicated by clinical and bacteriological findings, intramuscularadministration of 6 to 8 g daily of PIPRACIL, in divided doses, may be utilized for initiation of therapy. In addition, intramuscular administration of the drug may be considered for maintenance therapy after clinical and bacteriologic improvement has been obtained with intravenous piperacillin sodium treatment. Intramuscular administration should not exceed 2 g per injection at any one site.The preferred site is the upper outer quadrant of the buttock (ie, gluteus maximus).
The deltoid area should be used only if well-developed, and then only with caution to avoid radial nerve injury. Intramuscular injections should not be made into the lower or mid-third of the upper arm.
Stability of PIPRACIL Following ReconstitutionPIPRACIL is stable in both glass and plastic containers when reconstituted with recommended diluents and when diluted with the intravenous solutions and intravenous admixtures indicated above.
Pharmacy vials should be used immediately after reconstitution. Discard any unused portion after 24 hours if stored at room temperature (20° to 25°C [68° to 77°F]), or after 48 hours if stored at refrigerated temperature (2° to 8°C [36° to 46°F]). Vials should not be frozen after reconstitution.
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