What does “Sulfamethoxazole TMP SS” mean?
“Sulfamethoxazole TMP SS” usually refers to trimethoprim–sulfamethoxazole tablets or suspension in a strength labeled “SS”, which commonly stands for single strength (as opposed to “DS” for double strength). It’s a shorthand used on prescriptions, pharmacy labels, and some formularies.
Trimethoprim–sulfamethoxazole is commonly written as:
- TMP/SMX (trimethoprim/sulfamethoxazole)
- Often expressed as mg of trimethoprim (TMP) plus mg of sulfamethoxazole (SMX) per dose.
What strength is “SS” compared with “DS”?
In many common labeling conventions:
- DS (double strength) typically contains 160 mg TMP / 800 mg SMX per tablet
- SS (single strength) is typically a smaller dose (often 80 mg TMP / 400 mg SMX per tablet)
Exact strength can vary by product and country, so the definitive answer is the dose written on the specific prescription label (the mg amounts).
What is this medication used for?
Trimethoprim–sulfamethoxazole is used for certain bacterial infections, such as:
- Some types of urinary tract infections
- Skin and soft tissue infections
- Some respiratory infections
- Certain cases of Pneumocystis jirovecii pneumonia (PCP) prevention/treatment (in specific regimens)
What side effects do people commonly worry about?
Common or clinically important concerns include:
- Rash (some rashes can be serious)
- Nausea/vomiting
- Allergy or hypersensitivity
- Higher risk in people with certain allergies (sulfa allergy)
- Less common but serious effects (like blood count changes or severe skin reactions) can occur
Can you confirm the exact dose?
If you paste the exact text from the prescription label (including the mg amounts), or tell me:
- the country,
- whether it says tablet or suspension, and
- the numbers (for example, “80/400” or “160/800”),
I can translate “SS” into the precise trimethoprim and sulfamethoxazole dose for your specific product.