Trimethoprim+Sulfamethoxazole

Uses	Bacterial infections
Therapy	Antibiotic
Side Effects	Nausea, vomiting, diarrhoea, headache

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Molecule Description

Trimethoprim+Sulfamethoxazole is an antibiotic medicine used to treat a wide range of bacterial infections, including those of the lungs, throat, urinary tract, ears, skin, and airways. It contains a combination of trimethoprim and sulfamethoxazole, which work together to stop the growth and multiplication of infection-causing bacteria. By targeting bacterial infections effectively, this medicine helps relieve symptoms and prevents the infection from spreading. Your doctor will determine the exact dose and duration of Trimethoprim+Sulfamethoxazole based on your condition and the severity of the infection. It is essential to take this medicine exactly as prescribed, without missing any doses, and to complete the full course, even if you start feeling better. Stopping the antibiotic midway may allow the infection to return and may also increase the risk of antibiotic resistance, making future infections harder to treat. Trimethoprim+Sulfamethoxazole should generally be avoided in children below 12 years of age, during pregnancy, and while breastfeeding, unless specifically prescribed by a doctor. Before starting this medicine, always inform your doctor about your medical history, especially if you have kidney or liver problems, blood disorders, or any known allergies to antibiotics. This will help your doctor ensure that Trimethoprim+Sulfamethoxazole is safe and effective for you. Some people may experience mild side effects while taking Trimethoprim+Sulfamethoxazole, such as nausea, vomiting, loss of appetite, or stomach upset. These side effects are usually temporary and may subside on their own as your body adjusts to the medication. However, if you experience severe side effects, such as persistent fever, unusual bleeding, skin rashes, or yellowing of the skin and eyes, contact your doctor immediately. For optimal results, Trimethoprim+Sulfamethoxazole should be taken with a glass of water and preferably after meals to minimise stomach irritation. Avoid alcohol while on this medicine, as it may worsen side effects. Always follow your doctor's instructions carefully and never self-medicate with antibiotics. Taking Trimethoprim+Sulfamethoxazole responsibly not only ensures faster recovery but also helps protect you against recurring or resistant infections.

Uses

Trimethoprim+Sulfamethoxazole is used to treat bacterial infections like ear infection, skin and soft tissue infection, urinary tract infections, lung, airway and throat infections.

Contraindications

When should one not use Trimethoprim+Sulfamethoxazole

If you are allergic to trimethoprim, sulfamethoxazole or any other ingredients of Trimethoprim+Sulfamethoxazole.
If you are suffering from any severe liver or kidney problems.
If you are pregnant or think you may be pregnant.
If you are suffering from any blood disorders (like anaemia, etc.).

Side effects

Common side effects of this drug are:

Nausea
Vomiting
Diarrhoea
Headache
Skin rash

Precautions and Warnings

Pregnancy

Trimethoprim+Sulfamethoxazole must not be used during pregnancy especially during first trimester. Please consult your doctor if you are pregnant, think you may be or are planning a pregnancy.

Breast Feeding

Components of Trimethoprim+Sulfamethoxazole pass into breast milk. Thus, you should consult your doctor before using this medicine while breastfeeding.

Driving

There is limited information about the effects of Trimethoprim+Sulfamethoxazole on driving. However, if you do not feel well or are unable to be alert, you should avoid driving.

Alcohol

Alcohol may worsen the side effects of Trimethoprim+Sulfamethoxazole, so it is advisable to avoid it. Consult your physician if you have a habit of regular drinking.

Other General Warnings

Talk to your doctor if

You are suffering from severe allergies or asthma.
You have problems related to your kidneys.
You have a folic acid deficiency.
You are malnourished or underweight.
You are above 60 years of age.
You are taking potassium supplements.
You have a rare disorder called porphyria.
You have a blood enzyme deficiency (glucose-6-phosphate dehydrogenase deficiency).
You are suffering from any blood disorder. Your doctor may ask you to do regular blood tests if you need long-term treatment or are prone to anaemia.

Mode of Action

How Does It Work?

Trimethoprim+Sulfamethoxazole works by the combined effects of both its components - trimethoprim and sulfamethoxazole.
Both are antibiotics and together work by inhibiting the synthesis of essential constituents required for the survival of bacteria and this results in the killing of bacteria.

Interactions

Interactions with other medicines

Some medicines can affect the way Trimethoprim+Sulfamethoxazole works or this medicine itself can reduce the effectiveness of other medicines taken at the same time.
Concomitant use of Trimethoprim+Sulfamethoxazole along with ciclosporin used for rheumatoid arthritis may cause kidney problems.
Medicines like procainamide used for irregular heartbeats when taken with this medicine can interfere with the action of this medicine.
Concomitant use along with blood thinners like warfarin, and coumarins may increase the risk of bleeding.
Using medicines like azathioprine and mercaptopurine used for rheumatoid arthritis with this medicine can affect the bone marrow and blood cells.
Trimethoprim+Sulfamethoxazole can enhance the effect of some antidiabetic medications such as repaglinide, decreasing your blood sugar levels abruptly.

Interactions with food items

Trimethoprim+Sulfamethoxazole can be taken with or without food. However, taking it with food may help reduce the risk of stomach upset.

Dosage

Overdose

Symptoms of overdose are nausea, vomiting, dizziness and confusion. If you think you have taken too much of Trimethoprim+Sulfamethoxazole, contact your doctor immediately or visit the nearest hospital.

Missed a Dose

In case you've missed any dose of Trimethoprim+Sulfamethoxazole, take it as soon as you remember. If it is almost time for the next dose, skip the missed dose. Avoid taking a double dose to compensate for the missed one.

Frequently Asked Questions (FAQs)

No, Trimethoprim+Sulfamethoxazole is an antibiotic and has to be taken for the complete course as prescribed by your doctor. If you stop taking this medicine in between before completing the course of treatment, your symptoms may reoccur. To ensure complete and effective treatment, take medicine for the full course even if you start feeling fine midway.

Taking Trimethoprim+Sulfamethoxazole with or after a meal may help avoid stomach discomfort. Follow your doctor's instructions.

No, Trimethoprim+Sulfamethoxazole is not an addiction causing medicine. However, it should be used as per dose and duration prescribed by your doctor.

Yes, Trimethoprim+Sulfamethoxazole can be used to treat urinary tract infections. It is an antibiotic that helps to relieve bacterial infections in the lungs, urinary tract, throat, ear and soft tissues.

No, this medicine should not be used for pimples. Pimples could be due to varied reasons and Trimethoprim+Sulfamethoxazole is a stronger antibiotic, so its use is limited for specific bacterial infections. Do not take any antibiotics without consulting your doctor.

Trimethoprim+Sulfamethoxazole is an antibiotic effective against specific infection-causing organisms. Products labelled DS contain a higher (double) strength, which your doctor may prescribe for more severe infections.

Trimethoprim+Sulfamethoxazole is used to treat bacterial infections like ear infections, skin and soft tissue infections, urinary tract infections, lung, airway and throat infections.

Nausea, vomiting, diarrhoea, headache, and skin rashes are some of the side effects an individual may experience with the use of Trimethoprim+Sulfamethoxazole. If any of these side effects persist or worsen, talk to your doctor.

No, Trimethoprim+Sulfamethoxazole is usually not recommended for children below 12 years of age unless specifically prescribed by a paediatrician.

People with kidney problems should use Trimethoprim+Sulfamethoxazole with caution. Your doctor may adjust the dose or suggest an alternative depending on your kidney function.

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