Pre-calculated for a typical Tosa (100–200 lbs). Always confirm dosages with your veterinarian.
About the Tosa
The Tosa's temperament is marked by patience, composure, boldness and courage. He is normally a tranquil, quiet, and obedient dog, with a calm but vigilant demeanor. With a stately manner and robust build, they were formerly bred for fighting, but are now used as watchdogs.
The Tosa is quietly affectionate with his own family, but may be somewhat aloof with strangers. This breed is also, by nature, watchful of other dogs and may react aggressively to dogs it considers intruders. Overtly aggressive behavior towards humans is uncharacteristic of the breed. Their short, dense coat can be fawn, red, apricot, black or brindle and they can also have white markings on their chest and feet. In addition, Tosas mature slowly and individual dogs may not reach their prime until as late as four years of age. This breed is the largest of all Japanese dog breeds. They are also known as the Tosa Ken, Tosa Dog, Tosa Token, Tosa Inu, Japanese Fighting Dog, and Japanese Mastiff.
Weight100–200 lbs
Height21.5–23.5 in
SizeGiant
GroupFoundation Stock Service
Lifespan10-12 years
Calculate dosages for
Medication dosages for a 150 lb Tosa
Standard veterinary dosing — always confirm with your vet
Calculated for a 150 lb Tosa (100–200 lbs range). Dosages are guidelines — your vet may adjust based on your dog's specific needs.
Tosa Health
Some dogs may be faced with health challenges in their lives, but the majority of Tosas are healthy dogs. Working with a responsible breeder, prospective owners can gain the education they need to learn about specific health concerns within the breed.
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For a typical Tosa (150 lbs), the recommended Gabapentin (gabapentin) dose is 340–680 mg per dose — approximately 5 × 100mg tablets. This is given every 8–12 hours for pain, anxiety & seizures.
Always confirm the exact dose with your veterinarian. Factors like age, health conditions, and other medications can affect the right dose for your specific Tosa.
For a typical Tosa (150 lbs), the recommended Trazodone (trazodone) dose is 136–340 mg per dose — approximately 5 × 50mg tablets. This is given every 8–12 hours for anxiety & sedation.
Always confirm the exact dose with your veterinarian. Factors like age, health conditions, and other medications can affect the right dose for your specific Tosa.
For a typical Tosa (150 lbs), the recommended Rimadyl (carprofen) dose is 136–299 mg per dose — approximately 3 × 75mg tablets. This is given once or twice daily for pain & inflammation (nsaid).
Always confirm the exact dose with your veterinarian. Factors like age, health conditions, and other medications can affect the right dose for your specific Tosa.
Some dogs may be faced with health challenges in their lives, but the majority of Tosas are healthy dogs. Working with a responsible breeder, prospective owners can gain the education they need to learn about specific health concerns within the breed.
What size dog is a Tosa?
Tosas are classified as a giant breed in the Foundation Stock Service, typically weighing 100–200 lbs and standing 21.5–23.5 inches tall. They have a life expectancy of 10-12 years.
The medication dosages on this page are general guidelines based on standard veterinary references. They are not a substitute for professional veterinary advice. Always consult your veterinarian before giving any medication to your pet. Dosages may vary based on your dog's health, age, other medications, and your vet's assessment.