Sulfamethoxazole/trimethoprim can cause various side effects in dogs. Gastrointestinal upset, including vomiting and diarrhea, is common. These issues usually resolve on their own, but contact your veterinarian if they persist or worsen.
Less frequently, dogs may experience decreased appetite or lethargy. Monitor your pet’s food and water intake, and report any significant changes to your vet. Skin reactions like rash or itching are also possible. If you notice any skin abnormalities, seek veterinary attention immediately.
In rare cases, more serious side effects can occur, such as anemia, jaundice (yellowing of the skin and eyes), or changes in urine color. These symptoms require prompt veterinary care. Also be aware of potential interactions with other medications your dog may be taking. Always inform your veterinarian about all medications and supplements your dog receives.
Blood work can help monitor for potential problems. Your vet may suggest blood tests before starting treatment and during the course of therapy to check kidney and liver function. Remember, this information is for general knowledge only and does not replace professional veterinary advice. Always follow your veterinarian’s instructions regarding dosage and monitoring.
