Peer-reviewed veterinary case report
Metronidazole oral suspension treats giardia infection in dogs safely
By Jones, Sloane et al.·Published in Parasites & vectors·2025·Virbac Corporation, United States·View original on PubMed →
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Original publication title: Treatment of giardiasis in dogs: field clinical study to confirm the efficacy, safety, and acceptance of a metronidazole-based flavored oral suspension.
- Species:
- dog
Plain-English summary
A group of dogs diagnosed with a common intestinal parasite called Giardia were treated with a flavored liquid medication containing metronidazole. Symptoms of giardiasis include diarrhea, vomiting, and weight loss, which were observed in these dogs. After receiving the treatment for five days, there was a remarkable 99.92% reduction in the parasite levels in their feces, and the dogs generally accepted the medication well. The treatment was safe, with only a few dogs experiencing mild side effects like diarrhea and vomiting. Overall, the metronidazole suspension proved to be an effective and well-tolerated option for treating giardiasis in dogs.
People also search for: dog diarrhea treatment · Giardia in dogs symptoms · metronidazole for dogs giardiasis
Abstract
BACKGROUND: Giardia duodenalis is a prevalent gastrointestinal parasite in dogs, causing diarrhea, vomiting, and weight loss. Metronidazole is a common treatment for this infection. This study aimed to evaluate the efficacy, safety, and acceptance of a flavored liquid metronidazole oral suspension in treating G. duodenalis in naturally infected dogs. METHODS: A double-masked, vehicle-controlled, randomized, multi-center clinical field trial was conducted. Client-owned dogs with confirmed G. duodenalis infections were enrolled and randomized into AYRADIA-treated and control groups. The AYRADIA group received the metronidazole suspension at 0.2 ml/kg twice daily for 5 days, while the control group received a flavored vehicle suspension without metronidazole. Fecal samples were collected before and after treatment to assess G. duodenalis cyst counts. Clinical examinations and owner assessments were also performed to evaluate safety and treatment acceptance. RESULTS: The study enrolled 180 dogs, with 129 included in the efficacy analysis. AYRADIA treatment resulted in a 99.92% reduction in G. duodenalis cyst counts, significantly higher than the reduction in the control group. Adverse events were similar between both groups (10%), mainly consisting of diarrhea and vomiting. The treatment was readily accepted by 99% of dogs. CONCLUSIONS: AYRADIA, administered at 0.2 ml/kg twice daily for 5 days, is highly effective in treating G. duodenalis infections in dogs. The treatment demonstrated a positive safety profile and excellent acceptance. This flavored oral suspension offers a valuable and convenient option for veterinarians managing giardiasis in dogs.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/40355903/