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[Generic]  Sulfamethoxazole and trimethoprim is an antibiotic used to treat a wide range of infections in horses, dogs, cats and other species of animals.
SMZ/TMP Oral Suspension may be used to treat bacterial and protozoal infections. SMZ/TMP may be used in horses where control of bacterial infections is required during treatment of acute strangles, respiratory tract infections, acute urogenital infections, wound infections and abscesses. Sulfamethoxazole and trimethoprim.

The generic equivalent of Bactrim and Septra
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Item# Size/Desc Qty Price
400mg/80mg 100 count bottle
This item requires a RX
400mg/80mg 500 count bottle
This item requires a RX
400mg/80mg per tablet
This item requires a RX
800mg/160mg DS 100ct. Tablets
This item requires a RX
800mg/160mg DS 500ct. Tablets
This item requires a RX
800mg/160mg DS per Tablet
This item requires a RX

**Note: This product requires a veterinarian's prescription to purchase.At checkout you will need to provide your veterinarian's FAX or email address. We will then send him or her a prescription verification that he or she will need to sign and return before we can ship you this product.


* Broad-spectrum antibiotic treats a range of bacterial and protozoal infections
* Used for respiratory, urinary tract, skin or gastrointestinal infections and other conditions
* Trimethoprim works with sulfamethoxazole for better effectiveness

Dosage and Administration:

Follow your Veterinarian's prescription instructions for your pet.

Always have plenty of drinking water available - your pet should not become dehydrated while taking SMZ-TMP

Shake liquid forms well before use.

Give by mouth.

This medication may be given with food.

If you miss a dose, give it as soon as you remember. If it is almost time for the next dose, skip the one you missed and go back to the regular schedule.

Do not give 2 doses at once.


Not for use in animals who are hypersensitive allergic to it or other sulfa medications. Not for use in pregnant or lactating animals female animals nursing their young unless benefits outweigh the risks.

Not for use in animals with dehydration bladder or kidney stones or severe liver or kidney disease.

Use with caution in animals with blood cell abnormalities such as anemia.

This medication should only be given to the pet for which it was prescribed.

Consult your veterinarian before using trimethoprim/sulfa with other medications, including vitamins and supplements, methotrexate, warfarin, phenylbutazone, thiazide, diuretics,

salicylates aspirin, probenecid, antacids, or phenytoin, since interactions may occur.

Possible Side Effects:

It is common to find sulfa crystals in the animal's urine during a urinalysis a test on the urine, which does not pose a problem in animals that remain well hydrated.

Less common, keratoconjunctivitis sicca KCS, dry eye may occur with long-term use of trimethoprim/sulfa. Stop giving the medication and consult your veterinarian if your pet experiences discharge from the eye, redness of the eye, squinting, or other signs related to the eye.

Other less common side effects in dogs include anemia resulting in pale gums and tiredness low platelets resulting in bleeding tendencies fever loss of appetite, vomiting diarrhea joint inflammation arthritis resulting in lameness kidney damage resulting in increased thirst and urination liver damage and skin rashes with possible sensitivity to sunlight. Stop giving the medication and consult your veterinarian if your pet experiences any of these signs.

Dogs can develop hypothyroidism with long-term use.

Cats will often drool excessively if allowed to taste the medication. Side effects in cats may include loss of appetite, low white blood cell counts and anemia resulting in pale gums and tiredness. Consult your veterinarian if your pet experiences any of these side effects.