Hello I am Dr. Joey. Thanks for trusting me to help you and your pet today. I am a licensed veterinarian with over 15 years of experience. I look forward to working with you.
I apologize no expert has jumped in to answer, but as with many of us I am sorry I cannot help with a phone call. The states/province I am licensed in do not allow me to communicate via phone calls, unless I have previously physically examined a pet. I could lose my license for doing so. If you would like I can opt out and see if there is another veterinarian that can make calls.
That aside I wanted to shoot you a quick answer that this should be fine. This is actually at the higher end of the normal dosing range for the drug. She doesn't really need this high a dose, but no anticipated toxic problems. I recommend go back to the recommended dosage of 200mg twice daily. Monitor for upset stomach, as we would even at the 200mg twice daily.
I am at a point I need to know what questions you have. We can continue our dialogue in this setting.
I hope that the information I provided has been helpful.
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