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Trifen (Bactrim)

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This medication is a combination of two antibiotics: sulfamethoxazole and trimethoprim. It is used to treat a wide variety of bacterial infections (such as middle ear, urine, respiratory, and intestinal infections). It is also used to prevent and treat a certain type of pneumonia (pneumocystis-type). This medication treats only certain types of infections. It will not work for viral infections (such as flu). Unnecessary use or misuse of any antibiotic can lead to its decreased effectiveness.

Other names for this medication:
Bactiver, Bactrim, Bactron, Bactropin, Baktar, Balkatrin, Biotrim, Biseptol, Ciplin, Cotrim, Cozole, Deprim, Ditrim, Ectaprim, Eusaprim, Gantrisin, Globaxol, Kemoprim, Lagatrim, Primadex, Purbac, Resprim, Sanprima, Sepmax, Septra, Septran, Septrin, Soltrim, Sulfa, Sulfamethoxazole, Sulfametoxazol, Sulfatrim, Sumetrolim, Supreme, Sutrim, Tagremin, Trimoks, Trimol, Trisul, Vanadyl

Similar Products:
Thiosulfil Forte, Gantanol, Azulfidine, Gantrisin


Also known as:  Bactrim.


Trifen is effective in a variety of upper and lower respiratory tract infections, renal and urinary tract infections, gastrointestinal tract infections, skin and wound infections, septicaemias and other infections caused by sensitive organisms.

Each Trifen tablet contains 80 mg trimethoprim and 400 mg sulfamethoxazole.

Each Trifen DS (double strength) tablet contains 160 mg trimethoprim and 800 mg sulfamethoxazole.


Shake this medication well before each dose. Carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose. Take this medication by mouth, as directed by your doctor, with a full glass of water (8 ounces / 240 milliliters). If stomach upset occurs, take with food or milk. Drink plenty of fluids while taking this medication to lower the unlikely risk of kidney stones forming, unless your doctor advises you otherwise. Dosage is based on your medical condition and response to treatment.

For the best effect, take this antibiotic at evenly spaced times. To help you remember, take this medication at the same time(s) every day.

Continue to take this medication until the full prescribed amount is finished, even if symptoms disappear after a few days. Stopping it too early may allow bacteria to continue to grow, which may result in a relapse of the infection.


Often, no treatment is needed for an antibiotic overdose. Usually, you'll need to watch for stomach upset and possibly diarrhea. In those cases, you should give extra fluids.


Store at room temperature between 20 to 25 degrees C (68 to 77 degrees F) away from moisture, light and heat. Throw away any unused medicine after the expiration date. Keep out of the reach of children.

Side effects

The most common side effects associated with Trifen are:

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Side effect occurrence does not only depend on medication you are taking, but also on your overall health and other factors.


Trifen is contraindicated in patients with a known hypersensitivity to trimethoprim or sulfonamides, in patients with a history of drug-induced immune thrombocytopenia with use of trimethoprim and/or sulfonamides, and in patients with documented megaloblastic anemia due to folate deficiency.

Trifen is contraindicated in pediatric patients less than 2 months of age. Trifen is also contraindicated in patients with marked hepatic damage or with severe renal insufficiency when renal function status cannot be monitored.

trifen plus tablets

His finger had become sore and then progressively more painful and swollen.

trifen cough syrup

During the 7-year study period, 909 elderly patients receiving glyburide were admitted with a diagnosis of hypoglycemia. In the primary analysis, those patients admitted for hypoglycemia were more than 6 times as likely to have been treated with co-trimoxazole in the previous week (adjusted odds ratio, 6.6; 95% confidence interval, 4.5-9.7). Patients admitted with digoxin toxicity (n = 1051) were about 12 times more likely to have been treated with clarithromycin (adjusted odds ratio, 11.7; 95% confidence interval, 7.5-18.2) in the previous week, and patients treated with ACE inhibitors admitted with a diagnosis of hyperkalemia (n = 523) were about 20 times more likely to have been treated with a potassium-sparing diuretic (adjusted odds ratio, 20.3; 95% confidence interval, 13.4-30.7) in the previous week. No increased risk of drug toxicity was found for drugs with similar indications but no known interactions (amoxicillin, cefuroxime, and indapamide, respectively).

trifen paediatric syrup dosage

From 1982 to 1988, 20 patients with pulmonary nocardiosis were diagnosed at the Department of Medicine, Chulalongkorn Hospital University. The infection was found to be common in immuno-compromised hosts particularly in patients who were suffering from lymphoreticular malignancy, systemic lupus erythematosus, nephrotic syndrome, pulmonary alveolar proteinosis and in patients who were receiving corticosteroids. The clinical manifestations were usually nonspecific. Diagnosis of pulmonary nocardiosis in cases who presented with a short duration of fever and productive cough was often delayed because they were considered to have acute bacterial pneumonia. The findings on chest roentgenogram were nonspecific as nonhomogeneous airspace infiltrates, cavitary lesions, nodule, or miliary infiltrates. The complete blood count frequently showed leukocytosis and neutrophilia. The diagnosis of nocardiosis was suspected if the staining of specimens obtained from the lesions showed typically weakly gram-positive and modified acid-fast branching filament organism and the diagnosis was confirmed by culture. The skin and the central nervous system were the most common hematogenous disseminations. Sulfamethoxazole and trimethoprim in combination were the drugs of choice. The treatment for a minimum of 6 months was appropriate in order to prevent relapse. Poor prognostic factors in nocardiosis were acute infection, Cushing's disease; and disseminated infection involving the central nervous system.

trifen dosage

This study was conducted between June 28, 2010, and September 25, 2013. 400 infants were enrolled and 393 randomized at 6 mo of age to no chemoprevention, monthly sulfadoxine-pyrimethamine (SP), daily trimethoprim-sulfamethoxazole (TS), or monthly dihydroartemisinin-piperaquine (DP). Study drugs were administered at home without supervision. Piperaquine (PQ) levels were used as a measure of compliance in the DP arm. Participants were given insecticide-treated bednets, and caregivers were encouraged to bring their child to a study clinic whenever they were ill. Chemoprevention was stopped at 24 mo of age, and participants followed-up an additional year. Primary outcome was the incidence of malaria during the intervention period. During the intervention, the incidence of malaria in the no chemoprevention arm was 6.95 episodes per person-year at risk. Protective efficacy was 58% (95% CI, 45%-67%, p<0.001) for DP, 28% (95% CI, 7%-44%, p = 0.01) for TS, and 7% for SP (95% CI, -19% to 28%, p = 0.57). PQ levels were below the detection limit 52% of the time when malaria was diagnosed in the DP arm, suggesting non-adherence. There were no differences between the study arms in the incidence of serious adverse events during the intervention and the incidence of malaria during the 1-y period after the intervention was stopped.

trifen 100 mg

A 38-yr-old male with acquired immunodeficiency syndrome developed neck pain in association with mild hyperthyroidism and a diffusely enlarged thyroid gland. Radioactive iodine scanning was consistent with thyroiditis, and biopsy of the thyroid demonstrated the presence of pneumocystis carinii in thyroid tissue. Treatment with pentamidine followed by trimethoprim sulfamethoxazole led to rapid normalization of thyroid size in association with the development of hypothyroidism. This case illustrates the natural history of pneumocystis carinii thyroiditis and suggests that thyroid disease be added to the spectrum of human immunodeficiency virus-associated endocrine dysfunction.

trifen 750 mg

One hundred sixty-one patients were enrolled, with 12 lost to follow-up. The failure rates were 5.3% (n=4/76) and 4.1% (n=3/73) in the placebo and antibiotic groups, respectively, yielding a difference of 1.2%, with a 1-sided 95% confidence interval (CI) (-infinity to 6.8%). Noninferiority was established with an equivalence threshold of 7%. New lesions occurred at the 10-day follow-up: 19 on placebo (26.4%) and 9 on antibiotics (12.9%), yielding a difference of 13.5%, with 95% 1-sided CI (-infinity to 24.3%). At the 3-month follow-up, 15 of 52 (28.8%) in the placebo group and 13 of 46 (28.3%) in the antibiotic group developed new lesions. The difference was 0.5%, with 95% 1-sided CI (-infinity to 15.6%).

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In children with urinary tract infection in vitro susceptibility to trimethoprim was comparable to that to trimethoprim/sulfamethoxazole and significantly higher than to sulfamethoxazole. This finding was similar at all sites. Adding sulfamethoxazole appears unnecessary and may represent a risk to patients. Trimethoprim can be used as an alternative to trimethoprim/sulfamethoxazole based on in vitro antibacterial susceptibility. Routine trimethoprim/sulfamethoxazole use for urinary tract infection should be carefully reevaluated.

trifen paediatric cough syrup dosage

Systemic lupus erythematosus (SLE) induced by drugs, primarily hydralazine and procainamide, is reviewed and compared with idiopathic SLE, and the use of these drugs in patients with idiopathic SLE is discussed. The etiology of SLE is unclear, but genetic predisposition is an important factor. Although more than 25 drugs have been suggested as causes of SLE, the majority of confirmed cases of drug-induced SLE involve hydralazine or procainamide. Parts of these chemical compounds apparently interact with nucleoproteins, causing stimulation of antinuclear antibody (ANA) production. The average age of patients with drug-induced SLE is nearly twice that of patients with idiopathic SLE. Approximately half the patients with drug-induced SLE are women, compared with 92% of patients with idiopathic SLE. For SLE induced by hydralazine or procainamide, musculoskeletal symptoms (especially arthritis in the hands and wrists) are the most common clinical manifestation. In patients with SLE induced by these drugs, ANAs and LE cells are present, erythrocyte sedimentation rate is often elevated, and a false-positive serologic test for syphilis is seen more frequently than in idiopathic SLE. Baseline ANA status should be determined before therapy with these drugs, and patients should be observed carefully for signs and symptoms of SLE. Hydralazine-induced SLE may be dose related; limiting the daily dose to 200 mg is recommended. Some drugs have been shown to exacerbate idiopathic SLE; these include estrogen-containing oral contraceptives and ibuprofen. Hydralazine and procainamide are probably safe for use in patients with idiopathic SLE, but alternative therapy should be considered. The clinical and laboratory manifestations of drug-induced SLE are similar to those of idiopathic SLE, but central nervous system and renal involvement are rare in drug-induced SLE.

trifen avicola tablets

Rats which were immunosuppressed with adrenal corticosteroids then transtracheally inoculated with Pneumocystis carinii were evaluated as models for study of drug efficacy. Trimethoprim/sulfamethoxazole, known to be effective against Pneumocystis, was given in therapeutic and prophylactic regimens and its long-term effectiveness determined by a protocol to study relapse. Untreated animals uniformly developed severe infection with differences in numbers of organisms between untreated and treated animals being greater than two logs. Therapy of prophylaxis studies could be completed in 6 to 7 weeks. Animals given prophylaxis or therapy with trimethoprim/sulfamethoxazole had few organisms detected in lungs. Numbers of organisms did not increase during the 4 weeks when the animals were continued on immunosuppression after discontinuing treatment as long as reinfection was prevented. These models are useful for evaluating anti-Pneumocystis activity of antimicrobials. Relapse study data suggest that reinfection may have an important role in development of recurrent Pneumocystis pneumonia.

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A patient with a yearlong fever of unknown origin responded to trimethoprim-sulfamethoxazole and was discovered to have culture-proved Nocardia asteroides sinusitis, with absence of detectable disease in other organs. An inhalational route is postulated as the mode of entry of the organism, with localization in the maxillary sinus.

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trifen avicola tablets 2016-04-30

The following report illustrates a case of trimethoprim/sulfamethoxazole-induced hypoprothrombinemia in a patient receiving ongoing warfarin therapy for atrial fibrillation and aortic valve replacement. He was treated with trimethoprim/sulfamethoxazole (TMP/SMX) for sinusitis. During this time, the patient's prothrombin time Clavulin Sinus Infection international normalized ratio (INR) increased 3.5 times higher than the baseline value. The INR values decreased when the antibiotic was discontinued. If a patient is on warfarin and TMP/SMX is added, INR values should be monitored closely.

trifen expect paediatric dose 2015-12-17

We present a case of mycetoma by Actinomadura spp. on the foot of an Albanian young man arrived to our observation approximately 5 years after the first clinical manifestations (hard tumefaction, slightly painful upon weight-bearing and palpation and cutaneous fistulas that discharged an abundant granulomatous secretion). Direct microscopic analysis and culture of the white-yellowish grains included Gram staining, which showed extensively branched Gram-positive hyphae less than 1 mm in diameter, allowing to make a Erythromycin Gel Safe During Pregnancy diagnosis of Actinomycetoma. Since Actinomycetoma is sensitive to drug treatment, the patient was given trimethoprim-sulfamethoxazole and amikacin twice daily for 45 days. After six months of chemotherapy, the patient's general condition improved, the swelling is slightly diminished and grain extrusion has ceased. The patient has been able to resume ambulation with normal footwear. Given the absence of liver and kidney functional alterations, the patient is scheduled to continue pharmacological treatment with trimethoprim-sulfamethoxazole.

trifen paediatric cough syrup dosage 2017-12-20

The objective of this study was to perform a systematic review and meta-analysis of the literature to evaluate Zithromax Drug Class the efficacy and safety of therapies for cerebral toxoplasmosis in HIV-infected adults. The pyrimethamine plus sulfadiazine (P-S) combination is considered the mainstay therapy for cerebral toxoplasmosis and pyrimethamine plus clindamycin (P-C) is the most common alternative treatment. Although trimethoprim-sulfamethoxazole (TMP-SMX) has potential advantages, its use is infrequent.

trifen paediatric syrup dosage 2017-02-03

The unprecedented genesis of a novel non-O1 Vibrio cholerae strain belonging to serogroup O139, which caused an epidemic in late 1992 in the Indian subcontinent, and its subsequent displacement by El Tor O1 vibrios after 18 months initiated a renewed investigation of the aspects of the organism that are related to pathogenesis. The reappearance of V. cholerae O139 with altered antibiotic sensitivity compared to O139 Bengal (O139B) in late 1996 has complicated the epidemiological scenario of V. cholerae and has necessitated an examination of possible rearrangements in the genome underlying such rapid changes in the phenotypic traits. With a view to investigating whether the phenotypic changes that have occurred are associated with alteration in the genome, the genome of the resurgent V. cholerae O139 (O139R) strains were examined. Pulsed-field gel electrophoresis analysis of NotI- and SfiI-digested genomic DNA of O139R isolates showed restriction fragment length polymorphism including in the cholera toxin (CTX) genetic element locus and with O139B isolates. Analyses of the organization of the CTX genetic elements in O139R strains showed that in contrast to two copies of the elements connected by two direct-repeat sequences (RS) in most of the genomes of O139B isolates, the genomes of all O139R strains examined, except strain AS192, have three such elements connected by a single RS. While the RS present in the upstream of the CTX genetic elements in the genome of O139R is of O139B origin, the RS connecting the cores of the elements has several new restriction sites and has lost the BglII site which is supposed Cilamox Syrup to be conserved in all O1 strains and O139B. The endonuclease I-CeuI, which has sites only in the rrn operons in the genomes of all organisms examined so far, has 10 sites in the genomes of O139R strains, compared to 9 in the genomes of O139B strains. The recent isolates of V. cholerae O139 have thus gained one rrn operon. This variation in the number of rrn operons within a serogroup has not been reported for any other organism. The results presented in this report suggest that like the pathogenic El Tor O1 strains, the genomes of O139 strains are undergoing rapid alterations.

trifen cough medicine 2015-01-24

Brucellosis is considered a known widespread zoonotic disease and is endemic in Mediterranean region, like Iran. This study reviewed the clinical manifestations, laboratory findings, and therapeutic regimen in childhood brucellosis in Iran. In this retrospective study, we reviewed hospital-records of 34 consecutive children with a confirmed diagnosis of brucellosis among a total number of 10,864 patients admitted to Children's Medical Center, Tehran, Iran, between 2002 and 2010. Among the patients diagnosed with brucellosis, 22 (65%) were admitted during spring and summer. Clinical findings of these patients at admission were arthritis, splenomegaly, hepatomegaly, lymphadenopathy, maculopapular skin rashes, and fever. Anaemia (53%) and leukopenia (33%) were the most common findings in the children. Only one patient had presented with leukocytosis. Four children (12%) were thrombocytopenic, and none of patients had pancytopenia. Blood cultures were positive in 5 patients (23%). Only one patient underwent bone-marrow aspiration and had positive culture for Brucella spp. Positive titres were found in 33 cases (97%) in Wright test, 23 cases (96%) in Coombs test, and 16 patients (72.7%) in 2ME (2-Mercaptoethanol) test. In one case, Wright and Coombs test titres were below 1:80 while Brucella spp. were isolated from blood at the same time. It is concluded, prolonged fever with joint involvement and Azithromycin Vaginal Infection organomegaly may increase possibility of infection with Brucella spp. Appropriate treatment regimen by more tolerable oral drugs, with a duration of at least 8 weeks, is recommended.

trifen 100 mg 2015-03-31

Incidence of malaria, calculated as the number of antimalarial treatments per Taxim Suspension person year.

trifen medicine 2016-05-14

Trimethoprim-sulfamethoxazole (co-trimoxazole) is one of the antimicrobials of choice for the treatment of Stenotrophomonas maltophilia infections. The analysis Avelox Allergic To Penicillin of mutants either lacking or overexpressing the efflux pump SmeDEF shows that this efflux pump contributes to intrinsic and acquired co-trimoxazole resistance in S. maltophilia. Since SmeDEF can extrude a variety of antibiotics, selection with such antimicrobials, including quinolones, might also select for S. maltophilia co-trimoxazole resistance.

trifen dosage 2016-09-05

Records of six patients with S. maltophilia Orelox Tabletas 100 Mg endophthalmitis between January 1, 1998, and December 31, 2007, were reviewed.