Ridprim DS Tablet

Ridprim DS Tablet is a prescription antibiotic tablet that contains sulfamethoxazole and trimethoprim in the strength shown on the package, with each tablet providing the labeled dose of both medicines. It belongs to the sulfonamide/trimethoprim antibiotic class and is used to treat certain bacterial infections, not viral illnesses like colds or flu. Ridprim DS Tablet is commonly prescribed for susceptible urinary tract infections, some ear and respiratory infections, and certain other bacterial infections when a doctor decides this combination is appropriate.

How it works: Ridprim DS Tablet works by combining two antibiotics that block bacterial folate production at two different steps, which stops bacteria from making the DNA they need to grow and multiply. In tablet form, it is swallowed whole and absorbed into the body to treat infections throughout the urinary tract, lungs, ears, and other areas where the bacteria are sensitive to this medicine.

Ridprim DS Tablet is the double-strength tablet form of sulfamethoxazole + trimethoprim, so it delivers more medicine per tablet than lower-strength versions. That can make it convenient for people who have been assessed by a doctor and need a stronger tablet-based dose schedule, rather than taking multiple lower-strength tablets. Because it is a higher-strength tablet, it should not be used as a starting point unless the prescriber specifically chooses it.

• Urinary tract infections
• Certain ear infections
• Some respiratory tract infections
• Traveler’s diarrhea caused by susceptible bacteria
• Other bacterial infections as prescribed

• Swallow Ridprim DS Tablet with a full glass of water.
• Take it exactly on the schedule your prescriber gives you; do not change the dose on your own.
• You may take it with food or milk if it upsets your stomach.
• Drink plenty of fluids while using this medicine unless your doctor tells you otherwise.
• Finish the full course even if you feel better sooner.
• Do not crush or chew unless your pharmacist or prescriber specifically tells you it is okay.

Each Ridprim DS Tablet contains the labeled double-strength amount of sulfamethoxazole plus trimethoprim per tablet. The number of tablets taken per day depends on the infection being treated, kidney function, age, and other medical factors, so the prescriber must set the dose and duration. Some regimens use this higher-strength tablet once or twice daily, and the maximum daily amount is determined by the doctor rather than by the patient.

Do not change your dose or stop the medicine without speaking to your doctor.

Common side effects of Sulfamethoxazole + Trimethoprim may include:

• Nausea
• Vomiting
• Loss of appetite
• Diarrhea
• Mild rash or itching
• Headache
• Increased sensitivity to sunlight

• Use caution if you have a history of sulfa allergy or severe antibiotic allergy.
• This is a higher-strength tablet, so the doctor should confirm it is the right dose for your infection and kidney function.
• Tell your prescriber if you have kidney disease, liver disease, folate deficiency, or a history of blood disorders.
• Stay well hydrated to help lower the risk of kidney-related side effects.
• Use sun protection, because this medicine can make you more sensitive to sunlight.
• Tell your doctor if you are pregnant, breastfeeding, elderly, or taking a medicine that can raise potassium.
• Do not use it for viral infections, and do not skip doses or stop early without medical advice.

• Warfarin and other blood thinners
• Methotrexate
• ACE inhibitors or ARBs, and spironolactone, which can raise potassium
• Phenytoin
• Certain diabetes medicines such as sulfonylureas

Store Ridprim DS Tablet at room temperature in its original strip or box, away from moisture and excessive heat, and keep it out of reach of children.