The dosage of doxycycline per kilogram of body weight for cats is 10 mg. And usually take doxycycline for about a week at most. Cat doxycycline belongs to the tetracycline antibiotics and is used to treat infections caused by Gram-negative bacteria, Gram-positive bacteria and mycoplasma. Owners must strictly follow the doctor’s advice when using it, and determine the dosage based on the cat’s weight. Never increase the dose on your own, otherwise it will harm your cat's health.

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Doxycycline has certain liver and kidney toxicity. Excessive dosage can cause severe liver damage, and fatal kidney poisoning can occasionally be seen. Doxycycline is prohibited for sick animals with severe liver and kidney dysfunction.