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Stay away from giving your dog human pain medications which are toxic to pets.
Updated on June 19th, 2026

Discover how to choose the best supplements for your pet’s health, from essential vitamins to joint support and digestion aids. Learn age-specific and seasonal supplement tips for cats and dogs.
Updated on June 19th, 2026
You may have heard that flea and tick prevention are crucial for dogs and cats, but do you know why? Petco is sharing why and how to prioritize pest prevention for your pet.
Updated on June 19th, 2026
Read more about the different types of flea treatments and how they work to help eliminate fleas from your pet for their safety and happiness.
Updated on June 19th, 2026
At some point in your pet’s life, you might want to switch from one flea and tick medication to another. So, how do you make the transition?
Updated on June 19th, 2026
The average dosage of SMZ-TMP for dogs is about 13mg per pound given once daily. For a 50 pound dog this would be about 650mg daily. However, if you need to give a medication such as SMZ to your dog it is best to contact your local veterinarian for the correct dosage and usage information as this dosage can vary depending on your dog's personal needs or illness. Antibiotics should only be given under direct veterinary supervision as the antibiotics you have on hand may not be the correct dosage or even type for your dog's current condition. Giving a medication in the wrong dosage or frequency may make the illness worse or cause side effects that are detrimental to your dog.
Updated on September 24th, 2025
The usual dose used is 15mg/kg but you could go as high as 30mg/kg; so a 26# dog would need between 177mg to 354mg twice a day. I do think the dose is high so please call your vet and ask. Personally I would use 1/2 of a 480mg tablet twice a day. The person who filled the prescription may have made an error. The drug is very safe so I would not be worried about it's safety. Remember, any drug can cause side effects but I use this drug A LOT and very rarely see any side effects and if I do, they are usually mild. ( https://www.petplace.com/article/drug-library/drug-library/library/trimethoprimsulfadiazine-tribrissen-for-dogs-and-cats/ )
Updated on September 24th, 2025
Unfortunately, we are not permitted to give out drug dosages without a veterinarian - client - pet relationship. If you are seeking this information, I would obtain it through a veterinarian in person or through a veterinary formulary such as Plumb's or Merck. Hope this makes sense.
Updated on September 24th, 2025
We don't sell prescription drugs here since we are only a consulting forum. However, if you want to do comparison prices for drugs then the best resource is https://www.goodrx.com OR calling the pharmacy of your choosing directly. I wish you all the best and hope that you can find an affordable price for your pets medication. Take care!
Updated on September 24th, 2025
Hi, thanks for using PetCoach! Unfortunately you didn't provide your dogs weight so we can not give you doses. I recommend calling your Vet when they re-open. In the US it is not legal to prescribe medications with out a label and the medications not reconstituted (made in to a liquid from the powder form). Are you in the US? Also in the US we do not prescribe Acetominophen ( https://www.petcoach.co/canigive/dog/tylenol/ ). I recommend calling your Vet regarding that medication as we can't recommend giving it to dogs. I am sorry but if you want to re-post with Ringa's weight we can probably help with the Amoxicillin).
Updated on September 24th, 2025