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To reduce the development of drug-resistant bacteria and maintain the effectiveness of Bactrim (sulfamethoxazole and trimethoprim) tablets and other antibacterial drugs, Bactrim (sulfamethoxazole and trimethoprim) tablets should be used only 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 empiric selection of therapy.
Urinary Tract Infections: For the treatment of urinary tract infections due to susceptible strains of the following organisms: Escherichia coli, Klebsiella species, Enterobacter species, Morganella morganii, Proteus mirabilis and Proteus vulgaris. It is recommended that initial episodes of uncomplicated urinary tract infections be treated with a single effective antibacterial agent rather than the combination.
Acute Otitis Media: For the treatment of acute otitis media in pediatric patients due to susceptible strains of Streptococcus pneumoniae or Haemophilus influenzae when in the judgment of the physician sulfamethoxazole and trimethoprim offers some advantage over the use of other antimicrobial agents. To date, there are limited data on the safety of repeated use of BACTRIM in pediatric patients under two years of age. BACTRIM is not indicated for prophylactic or prolonged administration in otitis media at any age.
Acute Exacerbations of Chronic Bronchitis in Adults: For the treatment of acute exacerbations of chronic bronchitis due to susceptible strains of Streptococcus pneumoniae or Haemophilus influenzae when a physician deems that BACTRIM could offer some advantage over the use of a single antimicrobial agent.
Shigellosis: For the treatment of enteritis caused by susceptible strains of Shigella flexneri and Shigella sonnei when antibacterial therapy is indicated.
Pneumocystis jiroveci Pneumonia: For the treatment of documented Pneumocystis jiroveci pneumonia and for prophylaxis against P. jiroveci pneumonia in individuals who are immunosuppressed and considered to be at an increased risk of developing P. jiroveci pneumonia.
Traveler's Diarrhea in Adults: For the treatment of traveler's diarrhea due to susceptible strains of enterotoxigenic E. coli.
DOSAGE AND ADMINISTRATION
BACTRIM is contraindicated in pediatric patients less than 2 months of age.
Urinary Tract Infections and Shigellosis in Adults and Pediatric Patients, and Acute Otitis Media in Children
Adults: The usual adult dosage in the treatment of urinary tract infections is 1 BACTRIM DS (double strength) tablet or 2 BACTRIM tablets every 12 hours for 10 to 14 days. An identical daily dosage is used for 5 days in the treatment of shigellosis.
Children: The recommended dose for children with urinary tract infections or acute otitis media is 40 mg/kg sulfamethoxazole and 8 mg/kg trimethoprim per 24 hours, given in two divided doses every 12 hours for 10 days. An identical daily dosage is used for 5 days in the treatment of shigellosis. The following table is a guideline for the attainment of this dosage:
Children 2 months of age or older
|Weight||Dose - every 12 hours|
|88||40||2 or 1 DS tablet|
For Patients with Impaired Renal Function: When renal function is impaired, a reduced dosage should be employed using the following table: Creatinine Recommended Clearance (mL/min) Dosage Regimen
|Creatinine Clearance (mL/min)||Recommended Dosage Regimen|
|Above 30||Usual standard regimen|
|15–30||½ the usual regimen|
|Below 15||Use not recommended|
Acute Exacerbations of Chronic Bronchitis in Adults
The usual adult dosage in the treatment of acute exacerbations of chronic bronchitis is 1 BACTRIM DS (double strength) tablet or 2 BACTRIM tablets every 12 hours for 14 days.
Pneumocystis Jiroveci Pneumonia
Treatment: Adults and Children: The recommended dosage for treatment of patients with documented Pneumocystis jiroveci pneumonia is 75 to 100 mg/kg sulfamethoxazole and 15 to 20 mg/kg trimethoprim per 24 hours given in equally divided doses every 6 hours for 14 to 21 days.11 The following table is a guideline for the upper limit of this dosage:
|Weight||Dose - every 6 hours|
|70||32||2 or 1 DS tablet|
|106||48||3 or 1½ DS tablets|
|141||64||4 or 2 DS tablets|
|176||80||5 or 2½ DS tablets|
For the lower limit dose (75 mg/kg sulfamethoxazole and 15 mg/kg trimethoprim per 24 hours) administer 75% of the dose in the above table.
The recommended dosage for prophylaxis in adults is 1 BACTRIM DS (double strength) tablet daily.12
For children, the recommended dose is 750 mg/m²/day sulfamethoxazole with 150 mg/m²/day trimethoprim given orally in equally divided doses twice a day, on 3 consecutive days per week. The total daily dose should not exceed 1600 mg sulfamethoxazole and 320 mg trimethoprim.13 The following table is a guideline for the attainment of this dosage in children:
|Body Surface Area (m²)||Dose - every 12 hours Tablets|
Traveler's Diarrhea in Adults
For the treatment of traveler's diarrhea, the usual adult dosage is 1 BACTRIM DS (double strength) tablet or 2 BACTRIM tablets every 12 hours for 5 days.
BACTRIM™ TABLETS are supplied as follows:
BACTRIM™ DS (double strength) TABLETS (white, oval shaped, scored) containing 160 mg trimethoprim and 800 mg sulfamethoxazole – bottles of 100 (NDC 13310-146-01) and 500 (NDC 13310-146-05). Imprint on tablets (debossed): (front) BACTRIM DS
BACTRIM™ TABLETS (white, round, scored) containing 80 mg trimethoprim and 400 mg sulfamethoxazole – bottles of 100 (NDC 13310-145-01) and 500 (NDC 13310-145-05). Imprint on tablets (debossed): (front) BACTRIM
Store at 20° to 25°C (68° to 77°F). [See USP Controlled Room Temperature]
DISPENSE IN TIGHT, LIGHT-RESISTANT CONTAINER.
5. Clinical and Laboratory Standards Institute. Methods for Dilution Antimicrobial Susceptibility Tests for Bacteria that Grow Aerobically; Approved Standard – 9th ed. CLSI document M07– A9, CLSI, Wayne, PA, 2012.
11. Masur H. Prevention and treatment of Pneumocystis pneumonia. N Engl J Med. 1992; 327: 1853–1880.
12. Recommendations for prophylaxis against Pneumocystis carinii pneumonia for adults and adolescents infected with human immunodeficiency virus. MMWR. 1992; 41(RR–4):1–11.
13. CDC Guidelines for prophylaxis against Pneumocystis carinii pneumonia for children infected with human immunodeficiency virus. MMWR. 1991; 40(RR–2):1–13.
Manufactured for: AR Scientific, Inc. Philadelphia, PA 19124 USA by: Mutual Pharmaceutical Company, Inc. Philadelphia, PA 19124 USA. Rev 13, June 2013
Last reviewed on RxList: 7/30/2013
This monograph has been modified to include the generic and brand name in many instances.
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