SMZ-TMP Tablets: Prices, Strengths, and Package Options

SMZ-TMP is the tablet form of sulfamethoxazole and trimethoprim, a fixed-dose antibacterial combination that clinicians have prescribed for decades for infections such as urinary tract infections, bronchitis, and traveler's diarrhea. We list SMZ-TMP in two strengths and several package sizes, and this guide walks through the exact choices available in our catalog: strength, quantity, unit value, and how those choices line up with a prescribed course of treatment. A lower price per tablet only matters when the strength and quantity also match what a prescriber has directed, so we look at value alongside supply planning, storage, and expiration.

Understanding Your Choice: Strength, Quantity, and Value

Before comparing numbers, it helps to know what we actually offer. SMZ-TMP tablets come in two strengths: 400 mg sulfamethoxazole with 80 mg trimethoprim, and 800 mg sulfamethoxazole with 160 mg trimethoprim. Each strength is available in a range of package quantities counted in individual pills. Treatment length varies substantially by infection, patient factors, and whether the medicine is being used for treatment or prevention. The relevant question is therefore not simply "which is cheapest," but "which strength and authorized quantity match my prescriber's directions?"

Package value includes more than the lowest unit price. Consider the total number of tablets authorized, the strength required for each dose, how long treatment is expected to continue, and whether the tablets can be used before their expiration date. Antibiotics should not be obtained as an unsupervised reserve for a possible future infection, shared with another person, or used for a condition that has not been evaluated.

Available Packages and Unit Value

We price each SMZ-TMP package individually, and larger packages generally carry a lower cost per tablet. The comparison below shows the exact package sizes, prices, and per-tablet value we currently offer for the 400 mg/80 mg strength, so you can see how total cost and unit price move together as quantity increases.

For the 400 mg/80 mg strength, we offer package sizes of 90, 120, 180, 270, and 360 pills. For the 800 mg/160 mg strength, we offer 60, 90, 120, 180, 270, and 360 pills. These quantities provide several supply options, but they should not be treated as standard course lengths. Depending on the indication and prescribed regimen, even the smallest available package may contain more tablets than one treatment course requires.

Compare the available package with the quantity authorized for you rather than choosing on price alone. A larger package can have a lower average cost per tablet, but that saving is useful only when the full quantity is medically appropriate and expected to be used as directed. Unused tablets should not be saved for self-treatment of a later illness; ask a pharmacist about appropriate medication-disposal options when necessary.

Strength, Form, and Quantity Decisions

Both SMZ-TMP options are oral tablets containing the same two active ingredients; what changes is the amount of each ingredient per tablet. The table below sets out how the strengths and package options differ, separate from the pricing comparison above.

Which strength fits your prescribed course?

One 800 mg/160 mg double-strength tablet contains the same total amount of active ingredients as two 400 mg/80 mg single-strength tablets. That equivalence does not mean customers should substitute one option for the other without instructions. The prescribed strength, number of tablets per dose, dosing interval, and treatment duration depend on the indication, age, kidney function, and other clinical factors.

Tablets are taken by mouth with a full glass of water. They may generally be taken with or without food, although taking a dose with food can reduce stomach upset. Maintaining adequate fluid intake may help reduce the risk of crystals forming in the urine unless a clinician has advised fluid restriction. Take doses at the scheduled times, follow the prescribed duration, and ask a pharmacist or prescriber what to do about a missed dose rather than doubling the next one.

Brand, Generic, or Alternative Context

SMZ-TMP reflects the same active-ingredient combination sold historically under brand names such as Bactrim and Septra. Sulfamethoxazole is the sulfonamide component, while trimethoprim is a separate antibacterial medicine that blocks a later step in the same bacterial folate pathway. We list SMZ-TMP as the combination product rather than as a single-ingredient alternative.

For infections where a prescriber considers a different antibiotic more appropriate, we also carry oral Cephalexin and Doxycycline. These medicines differ in antibacterial spectrum, contraindications, interactions, and appropriate uses, so they are not direct substitutes based only on price or availability. Customers who want to view other antibacterial options can also browse our Antibiotics selection.

Established Use and Product Role

Sulfamethoxazole and trimethoprim tablets have an established role in treating several bacterial infections when the causative organism is known or likely to be susceptible. Uses may include:

• Uncomplicated and complicated urinary tract infections
• Acute exacerbations of chronic bronchitis caused by susceptible bacteria
• Acute otitis media in children, using age- and weight-specific dosing
• Traveler's diarrhea caused by susceptible strains of E. coli
• Prevention and treatment of Pneumocystis jirovecii pneumonia

A prescriber selects SMZ-TMP based on the suspected or confirmed organism, local resistance patterns, the treatment indication, and the patient's medical history. Cultures or other tests may be needed in some situations. Because resistance and recommended regimens vary, the same symptoms do not necessarily call for the same antibiotic or quantity each time.

How It Works and Practical Use

How does sulfamethoxazole and trimethoprim work together?

Sulfamethoxazole and trimethoprim block two consecutive steps in the bacterial folate-synthesis pathway. Sulfamethoxazole interferes with the use of para-aminobenzoic acid, while trimethoprim inhibits bacterial dihydrofolate reductase farther along the pathway. Bacteria need folate derivatives to make essential cellular components, including those required for DNA synthesis. Blocking sequential steps produces the combination's antibacterial effect and can make it more effective against susceptible organisms than either component used alone.

Some people begin to notice improvement within a few days, but onset depends on the infection, its severity, and whether the organism is susceptible. Lack of improvement, worsening symptoms, or new fever should be reported to a clinician. Complete the prescribed course even if symptoms improve early unless the prescriber tells you to stop because of an adverse reaction or another clinical concern. This antibacterial combination does not treat viral illnesses such as the common cold or flu.

Important Safety and Interactions

Sulfamethoxazole and trimethoprim have important contraindications, adverse effects, and interactions that should be reviewed before treatment. Key points include:

• A history of hypersensitivity to trimethoprim or sulfonamide antibiotics is a significant concern. Reactions can range from rash to severe, potentially fatal skin or systemic reactions.
• Use during pregnancy is generally avoided unless a clinician determines that the benefit outweighs the risk. Trimethoprim interferes with folate metabolism, and sulfonamide exposure at term can increase the risk of kernicterus in the newborn.
• The combination is contraindicated in nursing mothers under applicable product labeling because both components pass into breast milk and may pose risks to the infant.
• It is contraindicated in infants younger than 2 months. Older children require indication-specific, weight-based dosing.
• Severe liver damage and marked kidney impairment when renal function cannot be monitored are important contraindications. Reduced kidney function may require a dosage adjustment.
• People taking sulfonylurea diabetes medicines can have an increased risk of low blood sugar and may need closer glucose monitoring.

Recognized interactions include warfarin, methotrexate, phenytoin, digoxin, and medicines that can raise potassium levels. Trimethoprim can contribute to hyperkalemia, particularly in older adults, people with kidney impairment, or those taking certain blood-pressure medicines. A prescriber or pharmacist should review prescription medicines, over-the-counter products, vitamins, and supplements before treatment begins.

Common adverse effects include nausea, reduced appetite, vomiting, and rash. Seek urgent medical help for blistering or peeling skin, facial swelling, trouble breathing, unusual bleeding, severe or persistent diarrhea, jaundice, or other signs of a serious reaction. Longer treatment or increased clinical risk may call for blood counts, kidney and liver function tests, electrolyte monitoring, or assessment of the infection's response. This information is general and does not replace individualized guidance about dosage, duration, or monitoring.

Target Country Access and Prescription Context

What do US customers need to know about prescription requirements?

Sulfamethoxazole and trimethoprim is authorized for human medicinal use in the United States, and oral tablets are classified as prescription medicine. A licensed prescriber should determine whether the combination is appropriate and specify the strength, dose, and duration. This regulatory prescription status is separate from the particular verification steps used to accept an order through our site.

Follow the current instructions displayed during checkout for any information or documentation needed for your order. If you have a known sulfa allergy, kidney or liver disease, or you are pregnant or breastfeeding, discuss this with your prescriber before requesting SMZ-TMP. Our pharmacist and support team are available 24/7 by email, online chat, and phone if you have questions about our current ordering process.

Ordering, Delivery, and Receiving

Once the prescribed strength and quantity are settled, ordering through our site follows a straightforward process. It generally involves:

• Selecting the strength, either 400 mg/80 mg or 800 mg/160 mg, and an available package size consistent with the authorized supply
• Following the current order-verification instructions presented during checkout
• Reviewing the shipping method and estimated delivery timeframe before confirming payment
• Checking the delivered package against the ordered strength and quantity before use
• Storing the tablets at 68°F to 77°F and protecting them from light

Our support team, including a pharmacist, is reachable 24/7 by email, online chat, or phone if you need help understanding package options, completing checkout, or tracking delivery after your order has shipped. We pack SMZ-TMP tablets securely for transit. When the package arrives, check the label, tablet strength, seal, and expiration date. Contact us before use if the delivered product does not match the order or appears damaged.

Keep the tablets in their original container, away from excess moisture, light, children, and pets. Do not use tablets after their expiration date or transfer them to an unlabeled container. If delivery timing could interrupt an ongoing prescribed regimen, contact our support team and the treating clinician rather than changing the dose or schedule independently.

Value-Based Decision Summary

Choosing the right SMZ-TMP package comes down to three things working together: the strength your prescriber has specified, the number of tablets authorized for the prescribed regimen, and the package option that provides reasonable value without supplying medication for unplanned future use. We show the exact package prices and per-tablet value for the 400 mg/80 mg option in the comparison above, while the product selector provides the currently available choices for both strengths.

Confirm the active ingredients, strength, quantity, and prescribing directions before completing checkout. A lower unit cost is useful only when the selected supply is appropriate and can be used within the prescribed plan and before expiration. If anything about the offered strength, package quantity, storage, or ordering process is unclear, our support team and pharmacist are available at any hour to help you understand the available options.