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This is an archived Horseadvice.com Discussion. The parent article and menus are available on the navigation menu below:
HorseAdvice.com » Treatments and Medications for Horses » Antibiotics and Antimicrobials » Trimethoprim -Sulfa »
  Discussion on SMZ TMP causing laminitic outbreak?
Author Message
Member:
Green007

Posted on Saturday, Jan 8, 2005 - 2:49 pm:

My horse had very bad rainrot and the vet prescribed sulfa (SMZ-TMP) antibiotics to clear it up. The rain rot is doing great but he is suddenly unwilling to move forward and is limping on his left front. Could this antibiotic start a laminitic episode in an older, mildly cushingoid horse?
Moderator:
DrO

Posted on Sunday, Jan 9, 2005 - 11:05 am:

No this is not likely Debbie and a horse that is lame on one leg is not characteristic of founder. For more help see, Equine Diseases » Lameness » Localizing Lameness in the Horse.
DrO
New Member:
Flask

Posted on Sunday, Jan 9, 2005 - 3:10 pm:

As this is my first post I hate to somewhat disagree. It is not characteristic of a lamintic episode but not unheard of as it happened to my horse. Who was lame in his right front for the first three days and then was extremely sore in both fronts. He foundered and rotated over 12 degrees and penetrating on his right front.
Cheryl
I needed to edit to say my horse did not founder do to SMZ TMP.
Moderator:
DrO

Posted on Monday, Jan 10, 2005 - 6:43 am:

Don't worry about disagreeing Cheryl, as long time members know well, I love a good disagreement. However this is not something we disagree on: I say "unlikely" you say "not characteristic" they mean about the same.

I have seen unilateral founders also but they are rare enough to be able to question the diagnosis when someone posts one with no other symptoms given. Though almost always one foot is a little worse than the other the vast magority of the founders will look stiff and reluctant to move more than they appear obviously lame on one leg.
DrO
Member:
Green007

Posted on Monday, Jan 10, 2005 - 9:53 am:

It is more obvious on the left front, but there is also a general unwillingness to move forward. There is no heat in the feet. Maybe it is something else like an abscess. He has been on bute for 2 days and I see no changes.
Moderator:
DrO

Posted on Monday, Jan 10, 2005 - 8:22 pm:

There are many possibilities Debbie you need a thorough exam by a veterinarian particularly if you think the horse is generally sore.
DrO
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