Bactrim is a prescription antibiotic and is a combination antibiotic of sulfamethoxazole and trimethoprim that is commonly used in the treatment of urinary tract infections (UTI). This combination antibiotic is also used to treat certain infections such as acne, urinary tract infections (UTI), and certain sexually transmitted diseases (STDs).
Bactrim is available in two forms:
Bactrim:5 mg/5 mlis commonly prescribed for the treatment of urinary tract infections (UTIs) and infections caused by bacteria in adults and adolescents. It is available in strengths ranging from 250 mg to 1,000 mg per day, depending on the severity of the infection.
Trimethoprim100 mg/5 mlis available in strengths ranging from 250 mg to 1,000 mg per day, depending on the severity of the infection. Trimethoprim is commonly prescribed for the treatment of UTIs and other UTIs caused by bacteria in adults and adolescents. It is available in strengths of 250 mg to 500 mg per day, depending on the severity of the infection. Trimethoprim is usually administered for three days starting on the first of which the patient should be observed for symptoms.
Follow the instructions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Do not use the medicine more often or for longer than prescribed. Do not stop taking the medicine without checking to make sure to get medical help for any unexpected side effects.
If you are taking a double dose of Bactrim, you will not get the full effect of the medication. However, if you take two doses at once, it will decrease the amount of time it takes for Bactrim to work. In some cases, you may get unwanted side effects from taking a double dose, such as nausea, vomiting, diarrhea, or stomach pain. It is important that the dose of Bactrim is taken as regularly as possible. Missing a dose can also cause the medication to not be effective. If you take too much of Bactrim, it may not work as well. If you have any concerns or side effects, it is important that they are discussed with your physician.
Common side effects of Bactrim include:
Nausea, vomiting, diarrhea, and abdominal pain.
Headache.
Flushing.
Allergic reactions.
Less common side effects may include:
Blurred vision, changes in color perception, and temporary blurred vision.
Fever, stiff neck, and tingling or numbness of the extremities.
Mood changes or depression.
Skin rash.
Severe allergic reactions.
More severe side effects may include:
Blood disorders (including low white blood cells, hemolytic anemia, thrombocytopenia, and agranulocytosis), increased susceptibility to infection, and increased risk of blood clots.
Signs of an allergic reaction that are difficult or impossible to detect with other medications.
Hair loss.
Tenderness, swelling, or fluid buildup in the chest, jaw, or throat.
Trouble swallowing.
Severe skin rash, which may be accompanied by hives, itching, or a red rash.
Abdominal pain, nausea, vomiting, diarrhea, and vomiting.
Fatigue.
Dizziness.
Severe headache.
Fever.
Loss of vision or hearing.
Bactrim DS contains the active ingredient sulfamethoxazole-trimethoprim sulfamethoxazole. This medication is used to treat and prevent certain bacterial infections caused by susceptible strains of bacteria. Bactrim DS works by stopping the growth of bacteria and preventing their spread.
Take this medication by mouth as directed by your doctor, usually 1 or 2 times a day, with or without food, as directed by your doctor. This medication is best taken on an empty stomach, at least 30 minutes before or after food. The dosage is based on your medical condition and response to treatment. Do not increase your dose more often or take it more often than directed. If you have questions or concerns about this medication, talk to your doctor.
If you are taking this medication for bacterial infections, your doctor may direct you to consult a physician for further evaluation or advice.
Follow the directions on your prescription label carefully, and do not use this medication ahead of time, without your doctor's approval.
Side effects may include upset stomach, diarrhea, loss of appetite, nausea, vomiting, or stomach pain. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Common side effects may include:
Rarely, patients may experience more serious side effects, including an allergic reaction (“flare of the mouth”), severe stomach or intestinal bleeding, blood disorder (swelling on the face/throat, unusual bruising, or breathing problems), severe dizziness, trouble breathing, fainting, or easy bruising or bleeding.
If you experience any severe or persistent side effects, seek medical help right away.
If you have problems with swallowable food or liquid, talk to your doctor. He or she may direct you to get medical help if your symptoms persist or become more severe.
This medication may be taken with or without food.
Children may be more comfortable using this medication to treat motion sickness and other serious illnesses because Bactrim DS prevents the growth of bacteria.
This medication may rarely cause serious problems with your liver or kidneys. If you have liver or kidney problems, do not take the drug but seek medical help right away.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including:
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
Copyright © 2025 The American Society of Health-System Pharmacists All rights reserved.This information sheet is a part of thebee product line. It contains information about a particular brand, service, and product that is not part of the product list. This information sheet may contain information that is not approved by the Food and Drug Administration.Bactrim DS is a combination of sulfamethoxazole and trimethoprim, two drugs that together combat bacterial infections. They are used to treat infections of the urinary tract, respiratory tract, and skin (UTI).
If you have Bactrim DS, you may be able to get rid of a UTI without the use of antibiotics.
Bactrim DS is used to treat bacterial infections in adults (including urinary tract infections and respiratory infections). Bactrim DS is also used to treat infections in children (e.g., gonorrhea). Bactrim DS should not be used for viral infections (e.g., the common cold, flu). Bactrim DS is also used to treat infections of the skin and soft tissue (e.g., cellulitis).
Bactrim DS is taken for adults to treat bacterial infections in adults.
Take Bactrim DS as prescribed by your doctor. Do not take larger doses or take it more often than prescribed by your doctor.
Some people may have a higher risk of developing certain side effects from taking this medicine. Tell your doctor if you are taking this medicine to treat any of the following:
Use of this medicine for viral infections does not prevent bacterial infections from coming back (e.g., the common cold, flu). If you are using this medicine for viral infections, do not take it or give it to anyone else.
If you miss a dose, take it as soon as you remember. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
If you have any of the following, tell your doctor or pharmacist promptly.
If you experience any of the following symptoms in a time of illness, contact your doctor promptly.
Tell your doctor immediately if you notice any of the following signs of a skin reaction or swelling.
Take one tablet before 4 pm on an empty stomach with water. Shake well before each dose. Take the tablet with food. You can take Bactrim with or without food, but a high-fat meal may delay the time it should be taken.
Read the Instructions for Use
Citibase DSShake well before dose.
You can take Bactrim DS with or without food, but a high-fat meal may delay the time it should be taken.
You can take Bactrim with or without food. If you have any questions about taking the tablet, consult your doctor or pharmacist.
Take the tablet with water. If your blood sugar levels do not decrease as you take it, or if you have any side effects, speak to your doctor.
The most common side effects of Bactrim are headache, nausea, abdominal pain, diarrhea, and vomiting. If these occur, or if you notice them, contact your doctor.
Take control of your weight
Bactrim can help control blood sugar levels in adults and children over the age of 12. It also can help to reduce the risk of complications from diet and weight gain associated with sulfhydryl is used.
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