Is Polymyxin B Sulfate and Trimethoprim the same as Sulfamethoxazole and Trimethoprim?

No. Polymyxin B Sulfate and Trimethoprim (Polymyxin B Sulfate And Trimethoprim) and Sulfamethoxazole and Trimethoprim (Sulfamethoxazole And Trimethoprim) are distinct medications. They are sometimes confused because of similar branding or because they treat overlapping conditions, but they have different active ingredients and different safety profiles.

Which has fewer side effects, Polymyxin B Sulfate And Trimethoprim or Sulfamethoxazole And Trimethoprim?

Side-effect frequency varies by individual. The side-effect comparison section on this page shows FAERS-reported events for each drug side by side. FAERS is voluntary reporting, so it reflects what patients and clinicians chose to report, not absolute population risk.

Can I switch from Polymyxin B Sulfate And Trimethoprim to Sulfamethoxazole And Trimethoprim?

Switching medications should always be done under prescriber supervision. The "patient stories" section on this page includes accounts from people who have made the switch and what their transition felt like, but those are individual experiences, not protocols.

Polymyxin B Sulfate And Trimethoprim vs Sulfamethoxazole And Trimethoprim

Compare Polymyxin B Sulfate And Trimethoprim (Polymyxin B Sulfate and Trimethoprim) and Sulfamethoxazole And Trimethoprim (Sulfamethoxazole and Trimethoprim), clinical data, side effects, and patient experiences.

Polymyxin B Sulfate And Trimethoprim

Polymyxin B Sulfate and Trimethoprim · Sulfonamide Antibiotic

How it works

Other agent

Approved for

INDICATIONS AND USAGE Polymyxin B Sulfate and Trimethoprim Ophthalmic Solution is indicated in the treatment of surface ocular bacterial infections

including acute bacterial conjunctivitis

and blepharoconjunctivitis

caused by susceptible strains of the following microorganisms: Staphylococcus aureus

OphthalmicTablet

Sulfamethoxazole And Trimethoprim

Sulfamethoxazole and Trimethoprim · Sulfonamide Antibiotic

How it works

Other agent

Approved for

INDICATIONS AND USAGE To reduce the development of drug-resistant bacteria and maintain the effectiveness of sulfamethoxazole and trimethoprim tablets

USP and other antibacterial drugs

sulfamethoxazole and trimethoprim tablets

USP 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

OralTablet

Quick Comparison

Polymyxin B Sulfate And TrimethoprimSulfamethoxazole And Trimethoprim

Drug Class

Sulfonamide Antibiotic

Route

Ophthalmic

Oral

Half-Life

N/A

FDA Approved

N/A

Side Effect Frequency Comparison

Estimated frequency (%) based on clinical trial data

Side Effects

Polymyxin B Sulfate And Trimethoprim

Drug Not Working

>10%

General Unwellness

1-10%

Shortness of Breath

1-10%

Vomiting

1-10%

Nausea

1-10%

Cough

1-10%

Diarrhea

1-10%

Headache

0.1-1%

Sulfamethoxazole And Trimethoprim

Fever

1-10%

Fatigue

1-10%

Diarrhea

1-10%

Nausea

1-10%

Rash

1-10%

Shortness of Breath

1-10%

Vomiting

1-10%

Drug Not Working

1-10%

FDA Warnings

Polymyxin B Sulfate And Trimethoprim

WARNINGS NOT FOR INJECTION INTO THE EYE

Sulfamethoxazole And Trimethoprim

WARNINGS Embryofetal Toxicity Some epidemiologic studies suggest that exposure to sulfamethoxazole and trimethoprim during pregnancy may be associated with an increased risk of congenital malformations, particularly neural tube defects, cardiovascular malformations, urinary tract defects, oral clefts, and club foot
Hypersensitivity and Other Fatal Reactions Fatalities associated with the administration of sulfonamides, although rare, have occurred due to severe reactions, including Stevens-Johnson syndrome, toxic epidermal necrolysis, fulminant hepatic necrosis, agranulocytosis, aplastic anemia and other blood dyscrasias
In rare instances, a skin rash may be followed by a more severe reaction, such as Stevens-Johnson syndrome, toxic epidermal necrolysis, hepatic necrosis, and serious blood disorders (see PRECAUTIONS )
Clinical signs, such as rash, sore throat, fever, arthralgia, pallor, purpura or jaundice may be early indications of serious reactions

Clinical Trial Data

No head-to-head clinical studies found for Polymyxin B Sulfate And Trimethoprim vs Sulfamethoxazole And Trimethoprim.

Polymyxin B Sulfate And Trimethoprim vs Sulfamethoxazole And Trimethoprim: What You Should Know

Key Differences

Both Polymyxin B Sulfate And Trimethoprim and Sulfamethoxazole And Trimethoprim belong to the Sulfonamide Antibiotic class. While they share a similar mechanism of action, differences in pharmacokinetics, dosing, and side effect profiles may make one more suitable than the other for individual patients. Polymyxin B Sulfate And Trimethoprim is administered via Ophthalmic, whereas Sulfamethoxazole And Trimethoprim uses Oral. Route of administration can affect onset of action and patient adherence.

Safety Considerations

Polymyxin B Sulfate And Trimethoprim carries 1 FDA warning. Sulfamethoxazole And Trimethoprim carries 4 FDA warnings. Patients should discuss all warnings and contraindications with their healthcare provider before starting or switching medications..

This comparison is for informational purposes only. Always consult a qualified healthcare professional before making medication decisions.

Related Comparisons

Polymyxin B Sulfate And Trimethoprim Sulfate vs Sulfamethoxazole And Trimethoprim→Sulfamethoxazole And Trimethoprim vs Trimethoprim→Sulfamethoxazole And Trimethoprim vs Trimethoprim Sulfate And Polymyxin B Sulfate→Polymyxin B Sulfate And Trimethoprim vs Polymyxin B Sulfate And Trimethoprim Sulfate→Polymyxin B Sulfate And Trimethoprim vs Trimethoprim→Polymyxin B Sulfate And Trimethoprim vs Trimethoprim Sulfate And Polymyxin B Sulfate→

Primary sources

Every figure on this comparison links back to its primary source. See data sources and methodology for the full provenance trail.

Polymyxin B Sulfate And Trimethoprim: DailyMed label · FAERS adverse events · ClinicalTrials.gov
Sulfamethoxazole And Trimethoprim: DailyMed label · FAERS adverse events · ClinicalTrials.gov

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Polymyxin B Sulfate And Trimethoprim vs Sulfamethoxazole And Trimethoprim

Polymyxin B Sulfate And Trimethoprim

Polymyxin B Sulfate and Trimethoprim · Sulfonamide Antibiotic

How it works

Other agent

Approved for

INDICATIONS AND USAGE Polymyxin B Sulfate and Trimethoprim Ophthalmic Solution is indicated in the treatment of surface ocular bacterial infections

including acute bacterial conjunctivitis

and blepharoconjunctivitis

caused by susceptible strains of the following microorganisms: Staphylococcus aureus

OphthalmicTablet

Sulfamethoxazole And Trimethoprim

Sulfamethoxazole and Trimethoprim · Sulfonamide Antibiotic

How it works

Other agent

Approved for

INDICATIONS AND USAGE To reduce the development of drug-resistant bacteria and maintain the effectiveness of sulfamethoxazole and trimethoprim tablets

USP and other antibacterial drugs

sulfamethoxazole and trimethoprim tablets

USP 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

OralTablet

Quick Comparison

Polymyxin B Sulfate And TrimethoprimSulfamethoxazole And Trimethoprim

Drug Class

Sulfonamide Antibiotic

Route

Ophthalmic

Oral

Half-Life

N/A

FDA Approved

N/A

Side Effect Frequency Comparison

Estimated frequency (%) based on clinical trial data

Side Effects

Polymyxin B Sulfate And Trimethoprim

Drug Not Working

>10%

General Unwellness

1-10%

Shortness of Breath

1-10%

Vomiting

1-10%

Nausea

1-10%

Cough

1-10%

Diarrhea

1-10%

Headache

0.1-1%

Sulfamethoxazole And Trimethoprim

Fever

1-10%

Fatigue

1-10%

Diarrhea

1-10%

Nausea

1-10%

Rash

1-10%

Shortness of Breath

1-10%

Vomiting

1-10%

Drug Not Working

1-10%

FDA Warnings

Polymyxin B Sulfate And Trimethoprim

WARNINGS NOT FOR INJECTION INTO THE EYE

Sulfamethoxazole And Trimethoprim

WARNINGS Embryofetal Toxicity Some epidemiologic studies suggest that exposure to sulfamethoxazole and trimethoprim during pregnancy may be associated with an increased risk of congenital malformations, particularly neural tube defects, cardiovascular malformations, urinary tract defects, oral clefts, and club foot
Hypersensitivity and Other Fatal Reactions Fatalities associated with the administration of sulfonamides, although rare, have occurred due to severe reactions, including Stevens-Johnson syndrome, toxic epidermal necrolysis, fulminant hepatic necrosis, agranulocytosis, aplastic anemia and other blood dyscrasias
In rare instances, a skin rash may be followed by a more severe reaction, such as Stevens-Johnson syndrome, toxic epidermal necrolysis, hepatic necrosis, and serious blood disorders (see PRECAUTIONS )
Clinical signs, such as rash, sore throat, fever, arthralgia, pallor, purpura or jaundice may be early indications of serious reactions

Clinical Trial Data

No head-to-head clinical studies found for Polymyxin B Sulfate And Trimethoprim vs Sulfamethoxazole And Trimethoprim.

Polymyxin B Sulfate And Trimethoprim vs Sulfamethoxazole And Trimethoprim: What You Should Know

Key Differences

Safety Considerations

This comparison is for informational purposes only. Always consult a qualified healthcare professional before making medication decisions.

Primary sources

Every figure on this comparison links back to its primary source. See data sources and methodology for the full provenance trail.

Polymyxin B Sulfate And Trimethoprim: DailyMed label · FAERS adverse events · ClinicalTrials.gov
Sulfamethoxazole And Trimethoprim: DailyMed label · FAERS adverse events · ClinicalTrials.gov