Primor (sulfadimethoxine / ormetoprim) is a broad spectrum antibiotic
used to treat susceptible bacterial infections in dogs. It is available
as 240mg and 1200mg scored tablets. The usual dose is 25mg/pound
by mouth on day 1 followed by 12.5mg/pound by mouth once a day thereafter.
Do not use in pregnant or nursing animals. Not for use in cats.
Pet should be encouraged to drink plenty of water. (sold per tablet)
Primor Tablets (Pfizer Animal Health)
What is this medication used for
Primor, a potentiated sulfa drug, is used in dogs for the treatment
of skin and soft tissue infections (wounds and abscesses), and urinary
tract infections caused by susceptible bacteria.
Primor is a prescription medication available as scored tablets.
How this medicine should be used
An initial starting dose of 25mg/lb on the first day of treatment
is followed by a dose of 12.5mg/lb given once a day. Treatment should
continue for 2 days after symptoms disappear, however, treatment
should not extend past 21 consecutive days.
What are the side effects
Side effects associated with this medication may include polyarthritis,
hives, facial swelling, fever, hemolytic anemia, increased thirst
and urination, vomiting, diarrhea, and loss of appetite. In rare
instances, behavioral changes, seizures, aggression and hyper-excitability
What special precautions are there
Do not use in dogs allergic to this medication or other sulfonamides.
Do not use in dogs with liver damage or blood dyscrasias. Dogs must
maintain adequate fluid intake. The safety in breeding dogs has
not been established.
In the event of an overdose
Contact your veterinarian or veterinary emergency room.
How should I store this medication
Keep this medication in the container it came in, tightly closed.
Store tablets at room temperature, away from excess heat, light
and moisture. Do not store in the bathroom. Throw away any medication
that is outdated or no longer needed. Keep this medication out of
the reach of children and pets.
This information sheet is for educational purposes only and is
intended to be a supplement to, and not a substitute for, the expertise
and professional judgment of your veterinarian. The information
is NOT to be used for diagnosis or treatment of your pet. You should
always consult your own veterinarian for specific advice concerning
the treatment of your pet.
The information is not intended to cover all possible uses, directions,
precautions, warnings, allergic reactions, drug interactions or
adverse effects, nor should it be construed to indicate that use
of a particular drug is safe, appropriate or effective for your
pet. It is not a substitute for a veterinary exam, and it does not
replace the need for services provided by your veterinarian.
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