Red top photinia is mildly toxic to humans, cats, and dogs if ingested. The entire plant—leaves, stems, berries—can cause gastrointestinal discomfort, nausea, vomiting, and diarrhea. Caution is needed to prevent accidental ingestion, especially among children and pets. Immediate veterinary care is crucial if cats or dogs consume any part of red top photinia to ensure prompt and appropriate treatment.