Dog Veterinary

Ask a dog vet and get answers to your dog health questions

Ask a Dog Veterinarian,
Get an Answer ASAP!

My dog ate 2 200 mg naproxen he ways 100 to 110 lbs. he

Customer Question
my dog ate 2 200...
my dog ate 2 200 mg naproxen he ways 100 to 110 lbs. he throws up a couple hours after he eats. been goin on for 2 days what do i need to do. he did go out yesterday and use the bath room started runny then turned solid
Submitted: 2 years ago.Category: Dog Veterinary
Show More
Show Less
Ask Your Own Dog Veterinary Question
Answered in 19 minutes by:
3/7/2016
Dog Veterinarian: Dr. Kara, Veterinarian replied 2 years ago
Dr. Kara
Dr. Kara, Veterinarian
Category: Dog Veterinary
Satisfied Customers: 18,369
Experience: Over 20 years of experience as a veterinarian.
Verified

Hello, my name is***** and I have over 20 years of experience as a veterinarian. I am sorry to hear that PJ ingested two 200mg (400mgs in total) Naproxen tablets.

Naporoxen is a nonsteroidal anti-inflammatory that we do not use in dogs due to the high incidence of side effects including gastrointestinal bleeding, ulcers (sometimes perforating) and kidney damage even when given appropriate doses.

The dose listed in Plumb's Veterinary Drug handbook in 2mg per kilogram (2.2 pounds) of body weight every 48 hours.

In a dog his size (100 pounds/ 2.2 pounds per kilogram = 45.45kg) a usual dose would be 91mg, (45.45kg X 2mgs per kilogram = 91mgs), so he ingested roughly 4.4 times a normal dose if he ingested 400mgs.

A likely lethal single (meaning given all at once) toxic dose of Naoproxen in dogs is 35mg/kg, or 1,590mg or 8 tablets of the 200mg size for a 100 pound dog.

Peak blood levels are within 3 hours of ingestion so these levels should have occurred the first night and would have explained his repeated vomiting and loose stools.

Toxic side effects are abdominal pain, vomiting, gastrointestinal ulcers which can perforate, dark tarry stools, weakness, anemia, and kidney damage shown by increased kidney waste product levels (BUN and creatinine) on blood testing.

Unfortunately the half life (the amount of drug metabolized and decreased by half) in dogs is very long, 72 hours, and as such the effects of the drug linger. It is likely he still has high levels of the drug in his system, even now.

While he definitely ate a toxic level, it may not be lethal IF he had normal organ function to start, and he gets good supportive care.

He should see his veterinarian for an exam and treatment based upon how much damage has been done. Your veterinarian will examine him, look for blood in his stools and urine, test his kidney waste blood levels and urine for signs of kidney damage and get him started on sucralfate which is an ulcer coating drug, as well as an acid reducer such as famotidine or omeprazole. They probably will want to put him on intravenous fluid therapy to flush out any remaining drug and support his kidney function. If he is continuing to vomit they can give him injectable anti-nausea drugs. Vomiting is dangerous because it leads to dehydration, which will only further stress his kidneys, and contribute to esophageal ulcers developing.

They will also likely recommend feeding a very bland diet.

At home now you can start either:

1) Pepcid-ac (famotidine) at a dose of one 10mg tablet per 20 to 40 pounds of body weight every 12 hours. (Three of the 10mg tablets for a dog his size).

OR

2) Prilosec (omeprazole) at a dose of one 20mg tablet per 40 to 80 pounds of body weight every 24 hours. (Two of the 20mg tablets for a dog his size).

You should also start feeding a bland diet mix of 1/3 boiled, lean hamburger (or boiled, white, skinless chicken) and 2/3 boiled white rice. Give small meals several times a day. Feed the bland diet for several days, then if his vomiting stops you can slwoly start mixing in his regular diet and slowly convert him back.

But ideally this is something he should see his veterinarian for treatment for to avoid a possible perforating ulcer and/or kidney failure.

Best of luck with PJ, let me know if you have any further questions.

Ask Your Own Dog Veterinary Question
Dog Veterinarian: Dr. Kara, Veterinarian replied 2 years ago

Hello, I wanted to check in and see if you had any further questions after reading my response. If you do please feel free to respond with them. If not and you found my information helpful please remember to rate my response positively so I may receive credit for my work thank you, ***** *****

Ask Your Own Dog Veterinary Question
Was this answer helpful?
Ask Dr. Kara Your Own Question
Dr. Kara
Dr. Kara
Dr. Kara, Veterinarian
Category: Dog Veterinary
Satisfied Customers: 18,369
18,369 Satisfied Customers
Experience: Over 20 years of experience as a veterinarian.

Dr. Kara is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

It was so professional, so personally concerned (as we were) and you answered all of our questions. George and I are so happy that I found "JustAnswer" on my Google search -- you are now in my "Favorites" list! And, yes we do love our kitty - she makes our life complete!

Bev & GeorgeBoca Raton, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Dr. Debbie

Dr. Debbie

Dog Veterinarian

904 satisfied customers

Companion animal veterinarian practicing for over 10 years.

Dr. Andy

Dr. Andy

Medical Director

16,147 satisfied customers

UC Davis graduate, emphasis in dermatology, internal medicine, pain management

Dr Scott Nimmo

Dr Scott Nimmo

Dog Veterinarian

10,315 satisfied customers

BVMS, MRCVS. { Glasgow UK }

Dr. Gary

Dr. Gary

Dog Veterinarian

10,063 satisfied customers

DVM, Emergency Veterinarian, BS (Physiology)

Dr. Scott

Dr. Scott

Veterinarian

9,615 satisfied customers

15 years of small animal, equine and pocket pet medicine and surgery.

Dr. Bruce

Dr. Bruce

Veterinarian

9,533 satisfied customers

15 years of experience as a small animal veterinarian

Rebecca

Rebecca

Dog Veterinarian

8,299 satisfied customers

More than 30 years of companion animal practice.

< Previous | Next >

Related Dog Veterinary Questions
Can I give my dog a famotidine slurry? he is experiencing a
can I give my dog a famotidine slurry? he is experiencing a pancreatic attack: I am fasting him temporarily and already administered a sucralfate slurry three hours ago. My vet is not answering … read more
Dr. Kara
Dr. Kara
Veterinarian
18,369 satisfied customers
My dog was given doxycycline and famotidine can I give them
My dog was given doxycycline and famotidine can I give them both pills at the same timeout should I wait. He was also given sulcralfate suspension which I'm suppose to give one hour before or after th… read more
Dr. Michael Salkin
Dr. Michael Salkin
Veterinarian
DVM
3 satisfied customers
I fed her chicken that was boiled with a bit of garlic
i fed her chicken that was boiled with a bit of garlic powder. I just got her I didn't know garlic was toxic … read more
Dr Scott Nimmo
Dr Scott Nimmo
Dog Veterinarian
10,315 satisfied customers
This morning he ate chicken bones. It was during the night
This morning he ate chicken bones. It was during the night and I woke up to him eating it … read more
Dr. Altman
Dr. Altman
Veterinarian
Doctoral Degree
9 satisfied customers
Dog ate small bit of artist oil paint. is it toxic, it is m
Dog ate small bit of artist oil paint. is it toxic, it is m gram and co. akali refined walnut oil base … read more
DocPaul
DocPaul
Doctoral Degree
711 satisfied customers
Lactulose metronidazole famotidine and the amoxicillin
Lactulose metronidazole famotidine and the amoxicillin prescribed to my dog for liver shunt. Do any of these meds cause pain to the dog? She's being really “moody”… read more
Dr. Altman
Dr. Altman
Veterinarian
Doctoral Degree
9 satisfied customers
Is Tea Tree Oil toxic to small dogs? I just heard it was
I just heard it was toxic. I wanted to put a dab on his lower ear that he has scratched and is rough. … read more
Rebecca
Rebecca
Dog Veterinarian
Doctoral Degree
8,299 satisfied customers
Are lantana leaves toxic for dogs, my dog eat some but threw
are lantana leaves toxic for dogs, my dog eat some but threw up all fast.i think she got all out … read more
Dr. Jo
Dr. Jo
Veterinarian
BA
2 satisfied customers
What to feed my dog after vomiting & diarrhea & allergic to chicken?
JACustomer: What can I feed my dog after vomiting and diarrhea and also allergic to chicken? Expert: Did your dog eat anything unusual? JACustomer: No, always had soft stool. Expert: What is your dog'… read more
Heath Wilkerson
Heath Wilkerson
ER/ICU & Exotic Animal Veterinarian
Doctor of Veterinary Medicine
411 satisfied customers
I feed raw and have a dog with a "sensitivity" to chicken.
I feed raw and have a dog with a "sensitivity" to chicken. I'm considering a new product that has chicken organ in it. Can I expect him to react the same way to the organ as he does to he meat? Thanks… read more
Dr. Deb
Dr. Deb
Associate Veterinarian
Doctoral Degree
568 satisfied customers
My dog chewed on (but didnt swallow) an herbal, non toxic
hi my dog chewed on (but didnt swallow) an herbal, non toxic moth repellant he vomitted and is acting lethargic … read more
Dr. B.
Dr. B.
Veterinary Degree (BVMS)
3,475 satisfied customers
My dog vomited. I gave him famotidine but he vomitted again
My dog vomited. I gave him famotidine but he vomitted again after a while. I think he vomitted out the medication. What can I do for him now? What can I give him now?My dog has recently diagnosed with… read more
Scott Perry
Scott Perry
Veterinarian
Doctor of Veterinary Medicine
2,448 satisfied customers
Can we use Pepcid AC in place of famotidine? Our vet gave us
Can we use Pepcid AC in place of famotidine? Our vet gave us famotidine for her vomiting and we used those up already. Should or could we give her a second famotidine if she vomited? … read more
Dr. Peter
Dr. Peter
Doctors Degree
14,326 satisfied customers
My vet gave her famotidine does she take it with food or
my vet gave her famotidine does she take it with food or stand alone? … read more
DocPaul
DocPaul
Doctoral Degree
711 satisfied customers
My vet administered a CereniaI injection and a Famotidine
My vet administered a CereniaI injection and a Famotidine Injection to my dog on Wednesday. I gave her the pill form of each on Thursday. She has lost her appetitie and has explosive diarrhea I tried … read more
Dr. John
Dr. John
Veterinarian
Doctor of Veterinary Medicine
5,052 satisfied customers
I used to give my dog Famotidine for stomach issues. Have
I used to give my dog Famotidine for stomach issues. Have not done it for a while and can't remember how to administer it. I have 10 mg tablets that I cut in half and give one in the morning. Should I… read more
Dr. Altman
Dr. Altman
Veterinarian
Doctoral Degree
9 satisfied customers
My dog had diarrhea and after feeding him chicken and rice
my dog had diarrhea and after feeding him chicken and rice for a week, he will not go back to his regular feeding schedule and it's been three weeks. He eats sometimes but not always. … read more
Scott Perry
Scott Perry
Veterinarian
Doctor of Veterinary Medicine
2,448 satisfied customers
I have been feed feeding duke chicken and rice for 1.5 days
I have been feed feeding duke chicken and rice for 1.5 days he passed the meat pad, but tonight I have been up every 2 hrs b.c he is having diharrea does the chicken and rice cause diharrea that bad ?… read more
Dr. Christina
Dr. Christina
Small Animal Veterinary Internist
429 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x