My Musings on Arthritis Pain Management Pharmacology in Dogs

    • Bronze
    I found the Veterinary Information Network (http://www.vin.com/) site. Their site looks nice and lists clinical references. This is what I was looking for, as it has the veterinary pharmacology books (e.g. The Physiological Basis Veterinary Clinical Pharmacology-Baggot,2001 and Veterinary Pharmacology and Therapeutics, 9th Edition, Riviere, Papich, 2009). So, at least this will be a start for factual clinical data. I wonder what the chance is of finding either of these books locally. Well, the hunt begins...
    • Gold Top Dog
    try amazon.com for the books - they have a wide variety of medical/veterinarian books
    • Bronze
    Another interesting site is the Merck veterinary manual. Merck is a very well-known name in human clinical medicine.

    http://merckveterinarymanual.com/mvm/index.jsp

    Pain management in veterinary care:

    http://merckveterinarymanual.com/mvm/index.jsp?cfile=htm/bc/191606.htm

    I don't want to copy 'n paste without permission from Merck, but there are clinical explanations as to why etodolac and aspirin are reasonable choices for dogs, while ibuprofen and naproxen are not good choices. I know there will be people out there that will say, "I told you so." That's fine. I needed to hear more about the mechanism before I accepted conventional wisdom. What the Merck manual indicated is that part of the reason for the GI toxicity in dogs is due to extensive gastrointestinal-hepatic recirculation, with prolonged elimination half-lives. By example, the half-life of naproxen in people is 12-17 hours, while it's 35-74 hours in dogs. So, while it is dosed once or twice daily in people, perhaps it would need to be dosed around once every other day in dogs. So, dosing naproxen once or twice daily in dogs, which is what some well-intentioned people might do, but in doing so would potentially harm their pets. I know aspirin and etodolac are available quite cheaply online, such as Drs Foster & Smith, so perhaps those will be long-term options.

    • Bronze
    Boy, did I just get a surprise?! My vet had me pay $36/10 days of Rimadyl. I know they have costs to support and understand we pay for convenience. Based on that, I would be bankrupt with long-term use. In poking around Drs Foster & Smith, their Rimadyl is $36 for a month (1/3 the price I paid at the vet) and $196 for 6 months. Even better, Novox is a branded generic of carprofen, which is the same agent in Rimadyl. The month and 6 month prices of Novox are $24 and $103, respectively. Etodolac is $126 for 6 months. So, the funniest darn thing is that my quest for cost-savings and ease of availability has me coming back to the same drug I started with (carprofen), but I'll still need the prescription for it. By the way, my numbers are based on a 100-pound dog getting the meds daily.

    Have people here gotten Rimadyl and/or Novox from Drs. Foster & Smith?

    • Gold Top Dog

    nfowler
    I could use some decent glucosamine for my knees (winter is killing them--wah) and I want your advice as to what I can try. They are all quite pricey and I want to make sure that I spend my money on something that will be effective.

    This will contribute not only to you but also to real pain management. 

    The easy answer is Knox NutraJoint -- NOT glucosamine.  Nancy, with all the arthritis that *I* have (rheumatoid) I don't take glucosamine or chondroitin.  I honestly don't find them very helpful -- mostly because they are "hydrators" -- meaning they simply "plump up" connective tissue so it cushions better.  Stop taking it and it stops helping.

    But you have to HAVE connective tissue that's in good shape for g/c to work.  That's the catch. 

    NutraJoint is ground bovine cartilage, calcium and some minerals.  It literally helps the body **rebuild** cartilage -- as in a more permanent fix, rather than JUST hydrating what little cartilage may be left there.

    The drawback is that it may take months to work -- usually about 8 - 12 weeks.  BUT when it does it is permanent.  Now I generally use a teaspoon for a 30 pound dog (Billy takes it and so do I).

    ALSO -- at this point Osteo Biflex has bought this part of the Knox family.  So it's now called "Osteo Biflex Knox NutraJoint -- I got this from the Knox Company this week:

    "

    Thank you for contacting Knox. Knox has merged with Osteo Biflex and Knox NutraJoint powders are now known as Osteo BiFlex NutraJoint powder. NutraJoint powders are available at the following fine retailers: Wal-Mart, Kroger, Target, Eckerd, BJ’s, Sam’s Club, Publix, CVS/pharmacy, Walgreens, RITE-AID, Kmart, Albertson's, Discount Drug Mart, Duane Reade, Giant Eagle, Marc's / Expect Discounts, Meijer, Snyders Drug, A & P Supermarkets, Shoprite Supermarkets, Path-Mark, Price Chopper, Stop & Shop, Wegmans Food Markets, Kinney Drug, Penn Traffic, Brooks Drug, May’s Drug Stores, Ingles, MED-X, Winn-Dixie, H.E. Butt, Food Lion, Shopko, Pamida, Safeway, Raley’s. NutraJoint powders are also available online at www.drugstore.com.

     

    If you have any further questions, our Consumer Affairs Representatives can be reached toll-free at 1-888-893-5669, Monday through Friday, 9am-7pm EST. We look forward to serving you in the future. "

    Now -- (sorry that copied so huge)

    I also got an email from them the next day responding to my query about whether or not the formulas have changed - they have not.  NutraJoint HAS a formula with g/c in it but I don't use it -- it's really not necessary and it's VERY pricey.

    GBKakis

    I don't want to copy 'n paste without permission from Merck, but there are clinical explanations as to why etodolac and aspirin are reasonable choices for dogs, while ibuprofen and naproxen are not good choices. I know there will be people out there that will say, "I told you so." That's fine. I needed to hear more about the mechanism before I accepted conventional wisdom. What the Merck manual indicated is that part of the reason for the GI toxicity in dogs is due to extensive gastrointestinal-hepatic recirculation, with prolonged elimination half-lives. By example, the half-life of naproxen in people is 12-17 hours, while it's 35-74 hours in dogs. So, while it is dosed once or twice daily in people, perhaps it would need to be dosed around once every other day in dogs. So, dosing naproxen once or twice daily in dogs, which is what some well-intentioned people might do, but in doing so would potentially harm their pets. I know aspirin and etodolac are available quite cheaply online, such as Drs Foster & Smith, so perhaps those will be long-term options.

    You can copy and paste from Merck just give them 'credit' (reference them with a footnote like you would in a paper or article)

    But again, I'm going to interject -- you may be able to dose every other day on something EXCEPT -- the rate that it gets thru the body may not coincide with how well it works on the inflammation.  You're assuming that a reduced dose of whatever is going to work as well in a dog simply by using a lesser amount.

    Dogs have faster metabolisms in many ways than humans do -- but how they digest, how they process chemicals -- sometimes they need lesser amounts ... sometimes they need BIGGER amounts.  The amount of diphenhydramine (Benedryl) that a dog needs a GIGANTIC compared to how a human takes it.  Because of how they metabolize it.  But even jumping from one antihistamine to another, you can't assume the same ratio of amount used/how well it works because the different drugs are absorbed totally differently. 

    Part of the basic way an NSAID works is "cumulative".  Meaning what it does *today* actually builds on what was done **yesterday**.  Every day some inflammation is reduced ... but then more inflammation IS ADDED (because of the disease process).  So in order to make headway and steadily reduce the pain you have to have more inflammation reduced than is being added by the disease process.   A bit further down I will suggest that my own experience has taught me to use a relaxant to tip the scaled so more inflammation is reduced than is 'added' by the disease process.

    Simply shopping between Rimadyl/Previcox, etc is honestly not going to work as well as you wish.  Because each of those will affect different dogs different ways.  You may or may not know that one of two dogs in a household may have a touchier liver than the other.  Or maybe both of them -- because of exposure to toxins or unique genetic disposition -- may have liver or kidneys that are less able to cope than others.

    But you may want to consider that there ARE things you can to to mitigate that damage.  And some of those things are pretty darned cheap to do.

    TO THE ORIGINAL POSTER:

    I want to say this so you understand I'm not being snarky.  I'm going to make a wild guess that you have never experienced the same sort of pain your dogs may be experiencing -- hence your super clinical approach to this. 

    I can't do that.  I have some extensive medical/veterinary knowleldge but I'm not a vet.  But to explain as seriously as I can, truly trying not to be snarky -- even most vets are coming to the realization that prolonged use of NSAIDs and pain killers have severe side effects.  They don't like to admit that to clients simply because it can make them look bad.

    You asked why I thot you were trying to label acetaminaphen as an nsaid?? You, in the original post, were flatly speaking of "pain killers" and I honestly don't think of nsaids as a pain killer.  An nsaid releives pain in a roundabout way -- because it reduces the inflammation which is likely causing part or all of the pain -- but it's purpose is to relieve the inflammation ... THEN the pain as a result.  Pain killers like tramadol or even the dogs-can't-take-acetaminaphen work on the brain.

    It's obvious YOU know that, but it's important that ANYONE reading this thread not walk away from it with dangerous information. 

    But to finish explaining -- I have rheumatoid arthritis myself.  Have had for about 45 years now.  But I can't take the big guns nsaids -- I can't even take aleve (naproxyn sodium).  They make me violently ill -- this isn't a number, this s just plain my reality.

    So I figured out years ago that I had to approach pain management from a "what works" standoint.  I also figured out years ago that I'd like to be around for a long time, and having a liver and kidneys that "work" is definitely a plus in lovegvity since we kind of need them.

    I can't discuss Cox inhibitors with you.  But I can discuss what WORKS.  I can tell you how to approach pain management in a way that is kind to the body AND cost-effective.  I can also tell you that there's a serious hole in your theaory about simply doing twice annual bloodwork to check that all is ok.

    That's the real problem with approaching this the way you are -- because the body won't SHOW renal damage until it's VERY high.  And once you've reached like 75% renal failure -- which is where you begin to see nausea and compromised bloodwork values -- the dog only has about a month to live.

     So the caution has to come into play LONG LONG LONG before that.  That is if you want ANY longevity. 

    So -- you use stuff like Knox NutraJoint as described above.  Can I give you studies?? No -- they don't market to dogs.  But it works.  The fact that *I* am still on my feet is directly attributable to that.

    I can also tell you that ANY TIME you get great pain in joints, you can get better use out of whatever nsaid you DO use by the use of a relaxant at the same time. 

    Why?  Because when you hurt your muscles tighten and tense up.  THAT causes that joint to rub on itself even *harder*.  The more you tense, the more it hurts, the more it rubs, the worst the inflammation gets.  Vicous cycle.

    But if you take some sort of a gentle relaxant so the joint DOES relax, then the nsaid doesn't spend itself pointlessly trying to releive inflammation that is only going to worsen at the same instant you're trying to relieve it.

    ok - what's a 'gentle' relaxant?  ANY pharmaceutical relaxant tends to be habit-forming.  Valium is a prime example.   They will give it to dogs but only under certain circumstances -- it's a narcotic so it's not easy to get for a dog.

    HOWEVER -- you can use an herb like valerian, passion flower or skullcap or St. John's Wort.  They are *not* habit-forming. 

    You do have to delve into herbology tho -- because altho valerian is probably the most widely available of those nervine herbs I just mentioned, it's also secondarily digested in the liver so it's "harder" on the liver than the others.

    Herbs ARE medicine -- and they must be respected as such.  But they aren't studied ... there are no "numbers" if that's what you demand. 

     The other suggestion I'd have is the addition of milk thistle to whatever drug regimen you are going to impose.  Milk thistle (silymarin is the latin) is a protectant for the liver.  But it also helps liver function -- so much so that it can actually improve the performance of many drugs because the milk thistle helps the drug to metabolize better.

    Now if you want to look at the price of milk thistle capsules online or at your local health store it's pricey.  AND herbs are very like buying tomatoes at your grocery store.  They are plant matter -- you can get good quality -- or you can get sucky quality.  

    However, the thing you won't immediatley know, unless you know someone pretty well versed in herbology -- is that milk thistle doesn't taste bad at all.  So you can actually just put the milk thistle powder in their food, rather than using the capsules.  who cares??  Well, you can buy a pound of milk thistle bulk (just the ground powder) for about $12.70.  (http://www.leavesandroots.com )  -- and that's equal to about $180 - $200 worth of "capsules" purchased either online or in a store.  And the dog will digest the plain herb better without the cellulose capsule.  But that $12.70 can go a LONG way to ensuring that the NSAID won't trash the liver.

    You can buy Marin (put out by the same company that sells Adequan) but it is EXTREMELY pricey and if you're looking for something cheaper the herb is far better cost-wise, and actually has less side effects than the pharmacutical.

    Sorry -- I don't discuss statistics well -- I don't have much use for them because they often don't translate to reality.

    I have a real problem with "medicine by the number" -- just because 75% of those studied showed improvement on X mg. of ABC drug doesn't mean it's right for ME or mine.  (and I have had enough drug reactions to be exactly THAT distrustful of any and all pharmaceuticals).

    But you need a GOOD holistic vet to help work out a program that will help your dogs.

    The other thing I will suggest because it is an AWESOME tool to reduce inflammation and pain is acupuncture.  It works ... boy does it ever.  And it's not just my dogs who get it.  It was a VET (the head neurosurgeon up at the U of FL at Gainesville, in fact) who got ME to try acupuncture for my own arthritis (because it's how he controls HIS -- and we're talking about Dr. Roger Clemmons)

    If you're interested, in the video section of this forum there is a video of Billy getting acupuncture from Dr. Connie DiNatale. 

    I'm sure any thot of alternative medicine may be something you're less than comfortable with -- but it's valuable. 

    But honeslty?  Please don't try to have a purely clinical or "numbers" attitude about pain management.  Because it just plain doesn't WORK that way.  Pain is very personal -- and dogs are extremely stoic.  and if you assume you can just do aspirin because it's cheaper?  You honestly don't understand how pain works, nor do you fully understand all the things that go into long-term pain management but at the same time mitigating the damage being done to the body by the nsaids. 

    If you are ONLY looking at reducing pain - but you don't try to protect the body, and minimize the other side effects that may occur it is all likely to fall apart.  Things like Zantac, Tagamet, etc. to "protect" the stomach are fine -- there are herbs that are cheaper and more effects tho, that have less side effects. 

    If you want to discuss any of this further feel free to email me.  I have a whole article on pain management I'm happy to send you that discusses both human and dog arthritis management and pain management.  But it's practical -- not number based.

     

    • Bronze
    Callie, Nice post. Thanks. The only slight variant I would add is that unfortunately I may something very similar to my dog. My dog and I can bond in pain. I've been through six bone/joint surgeries below the belt, including some titanium to make the autopsy more interesting when I'm gone. :) Agree that there need to be many different approaches to pain. It's funny to see some who don't have pain with nearly every step comment about having slight pains. When you go through the joint problems you describe, you've written well about how we often simply try to take the edge off instead of trying to go pain free -- something that's often not possible. I also agree there may be a cumulative effect necessary and that it may not be as simple as just dosing less often.

    By the way, my tone has changed somewhat now that I see what Novox costs. While not as cheap as an OTC agent, it's certainly more within striking distance than the cost of chronic therapy through the vet.

    Wish my pup luck on Thursday at the vet. Hopefully we'll come away with a diagnosis of Pano and it'll (hopefully) be an easier road.

    • Gold Top Dog
    ask your vet about price matching through Dr. F&S. We do that for our clients, as we'd rather them buy through us than online.
    • Gold Top Dog

    We should all thank Callie for her extensive post. Thanks so much for the g/c info. I'll look into it and keep myself movingYes

    And I'd like to say to you, our original poster that pain management is WAY more than just a pill. Maybe it's different between human and dogs, but it really isn't--what's different is how we choose to approach our situation vs our dog's situation (for example).

    Just so you know (because you're disclosing more) I have a 7-year-old dog every SINGLE conventional vet has told me should not be alive doing very well. Yes, I keep Rimadyl and Tremadol in my cupboard, but for emergencies only. He has bad elbows, bad wrists, bad shoulders, bad back (very bad back) and bad hips. This guy can move. And he can do a lot. But I don't believe in just taking his pain way. It's way more "whole-listic" than an aspirin or an NSAID. And I don't believe in just covering up pain. There's so much more.

    So, give us a chance and let's all combine our various management techniques. That is what truly makes this forum so cohesive and invaluable. When we all work together (and I would imagine my seeing no less than 10 vets for this dog would help me seem a little more credible to newcomers on this forum).

     Best of luck to you.

    • Gold Top Dog

    Good luck Thursday at the vet!

    • Gold Top Dog

    GBKakis
    When you go through the joint problems you describe, you've written well about how we often simply try to take the edge off instead of trying to go pain free -- something that's often not possible.

    That's absolutely true --

    And part of it simply is that SOME people don't hurt at all -- so when they DO have pain it's nearly insurmountable for them.  It's just not in their frame of reference.

    GBKakis

    By the way, my tone has changed somewhat now that I see what Novox costs. While not as cheap as an OTC agent, it's certainly more within striking distance than the cost of chronic therapy through the vet.

    Most of the time *most* vets honestly aren't making tons of money via prescriptions.  Folks really don't understand that if your vet has an x-ray machine ... it's HIS.  If he has a stock of drugs -- they were paid for BY THE VET. 

    It's not like human doctors who are indentured to big hospitals, etc. for diagnostics.  Vets foot ALL that cost **on their own**.  It's GOT to be a business to them because it's all their money tied up in it -- and yet folks have this hissy fit if the vet makes a little money on meds because ABC Whatever company sells it cheaper.

    Well -- ABC Whatever company may be buying from cheaper sources that may or may not be sound.  They also aren't trying to pay the techs, receptionists, etc. for handling all THEY do (at the risk they have of being bitten, etc.)

    Besides -- there is a very sound feeling with a vet if they *prescribe* and fill something then they **KNOW** what the dog is taking.  Most owners just plain don't tell the vet that the dog is also taking X, Y, and Z which well could impact what the vet is seeing. 

    Some vets make a surcharge for writing a prescription to be filled outside.  Others don't. 

    GBKakis

    Wish my pup luck on Thursday at the vet. Hopefully we'll come away with a diagnosis of Pano and it'll (hopefully) be an easier road.

    Absolutely -- and yeah, Pano would be nice with the prognosis of "he'll outgrow it".  But if you have to ratchet it up a notch let us know.  If you want, email me -- I always have some extra little bottles of peppermint oil (the guy I buy from sends me these little bottles as premiums rather than sending me stupid pens b/c he knows I send it to folks with dogs with joint problems).  They're cheap to mail and you could at least try it and see how well it may back up whatever else you're doing.

    nfowler
    . But I don't believe in just taking his pain way. It's way more "whole-listic" than an aspirin or an NSAID. And I don't believe in just covering up pain. There's so much more.

     ABSOLUTELY -- that *is* the whole deal.  In a VERY real way, pain is completely different for a dog than for us.  To a dog, pain keeps them from over-doing.  It keeps them from hurting themselves MORE because a dog with no pain but WITH an existing problem is often a dog who will just ram around and get hurt worse.  So if the threat of pain keeps them from leaping a 3 foot fence to land hard on concrete -- or keeps them from making a flying leap off the bed or the back of the sofa -- then it's nature's way of protecting them.

    That does *not* mean we want them to suffer but it means we respect the purpose of that bit of pain to moderate their behavior to a degree.

    Nancy -- why don't you and I chat email or on the phone?? It sounds to me like I need to send you some White Flower Oil or something for you to try.  It might just help a ton and it's no big deal.  The relief of inflammation you get is incredible without gunking up fur.

     

    • Gold Top Dog

    I wish you luck at the vet on Thursday and just wanted to say that I found this thread very interesting reading. More than that, I applaud you for being open-minded about the whole issue. I've seen far too many people become almost combative over these types of discussions.

    As for your question about ordering from Fosters and Smith - I have and I've never had a problem.