Bactrim:

Generic name: sulfamethoxazole and trimethoprim.
Brand names: Bactrim, Bactrim DS.
Drug class: Sulfonamides.

What is Bactrim?

Bactrim contains a combination of sulfamethoxazole and trimethoprim. Sulfamethoxazole and trimethoprim are are both antibiotics that treat different types of infection caused by bacteria.

What is Bactrim used for?

Bactrim is a prescription medicine used to treat ear infections, urinary tract infections, bronchitis, traveler's diarrhea, shigellosis, and Pneumocystis jiroveci pneumonia.

To help reduce the development of drug-resistant bacteria and maintain the effectiveness of Bactrim, this medicine should be used only to treat infections that are proven, or strongly suspected, to be caused by susceptible bacteria.

Warnings:

You should not use Bactrim if you have severe liver disease, kidney disease that is not being monitored, anemia caused by folic acid deficiency, if you take dofetilide, or if you have had low platelets caused by using trimethoprim or a sulfa drug.

You should not take Bactrim if you are pregnant or breastfeeding.

Use Bactrim only as directed. Tell your doctor if you use other medicines or have other medical conditions or allergies.

Before taking this medicine:

You should not use Bactrim if you are allergic to sulfamethoxazole or trimethoprim, or if you have:

severe liver disease;

kidney disease that is not being treated or monitored;

anemia (low red blood cells) caused by folic acid deficiency;

a history of low blood platelets after taking trimethoprim or any sulfa drug; or

if you take dofetilide.

Sulfamethoxazole and trimethoprim may cause birth defects. Do not use Bactrim if you are pregnant. Tell your doctor if you become pregnant.

Do not breastfeed.

Bactrim should not be given to a child younger than 2 months old.

To make sure you can safely take Bactrim, tell your doctor if you have ever had:

kidney or liver disease;

a folate (folic acid) deficiency;

asthma or severe allergies;

HIV or AIDS;

a thyroid disorder;

malnourishment;

alcoholism;

an electrolyte imbalance (such as low blood sodium or high potassium);

porphyria, or glucose-6-phosphate dehydrogenase (G6PD) deficiency; or

if you use a blood thinner (such as warfarin) and you have routine "INR" or prothrombin time tests.

How should I use Bactrim?

Take Bactrim exactly as prescribed by your doctor. Follow all directions on your prescription label and read all medication guides or instruction sheets.

Drink plenty of fluids to prevent kidney stones.

Antibiotic medicines can cause diarrhea. Tell your doctor if you have diarrhea that is watery or bloody.

Keep using Bactrim even if your symptoms quickly improve. Skipping doses could make your infection resistant to medication. Bactrim will not treat a viral infection (flu or a common cold).

You may need blood and urine tests, and this medicine may be stopped based on the results.

Store Bactrim at room temperature away from moisture, heat, and light. Do not refrigerate.

Detailed Bactrim dosage information:

What happens if I miss a dose?

Use the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not use two doses at one time.

What happens if I overdose?

Seek emergency medical attention.

Overdose symptoms may include loss of appetite, vomiting, fever, blood in your urine, yellowing of your skin or eyes, confusion, or loss of consciousness.

What should I avoid while using Bactrim?

Bactrim could make you sunburn more easily. Avoid sunlight or tanning beds. Wear protective clothing and use sunscreen (SPF 30 or higher) when you are outdoors.

Bactrim side effects:

Get emergency medical help if you have signs of an allergic reaction to Bactrim (hives, cough, chest pain, shortness of breath, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning eyes, skin pain, red or purple skin rash with blistering and peeling).

Seek medical treatment if you have a serious drug reaction that can affect many parts of your body. Symptoms may include: skin rash, fever, swollen glands, joint pain, muscle aches, severe weakness, pale skin, unusual bruising, or yellowing of your skin or eyes.

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