I called Jude's previous owner tonight; she is a veterinarian and she will research this question for me tomorrow, BUT, I was wondering, if dogs can take Pyridium. One of Jude's problems is frequency, urgency and I am sure, bladder irritation. If he could take a drug that would relieve these symptoms, as they do in humans, he would feel better. Does anyone know? DH can order it for me and we can give it to Jude.