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Phenylbutazone Tablets (1 g)This page contains information on Phenylbutazone Tablets (1 g) for veterinary use.
The information provided typically includes the following:
- Phenylbutazone Tablets (1 g) Indications
- Warnings and cautions for Phenylbutazone Tablets (1 g)
- Direction and dosage information for Phenylbutazone Tablets (1 g)
Phenylbutazone Tablets (1 g)This treatment applies to the following species:
(Phenylbutazone Tablets, USP) 1 gram
NADA 44-756, APPROVED BY FDA
Phenylbutazone Tablets (1 g) Caution
Federal law restricts this drug to use by or on the order of a licensed veterinarian.
Phenylbutazone is a non-hormonal, anti-inflammatory agent. Chemically, it is described as 4-Butyl-1,2-diphenyl-3,5 pyrazolidinedione, a synthetic pyrazolone derivative, entirely unrelated to the steroid compounds.
ACTIONS AND USES: Kuzell1,2,3, Payne4, Flemming5 and Denko6, demonstrated clinical effectiveness of phenylbutazone in acute rheumatism, gout, gouty arthritis, and various other rheumatoid disorders in man. Anti-inflammatory activity has been well established by Fabre7, Domenjoz8, Wilhelmi9, and Yourish10.
Lieberman11 reported on the effective use of phenylbutazone in the treatment of conditions of the musculoskeletal system in dogs, including posterior paralysis associated with intervertebral disc syndrome, fractures, arthritis and injuries to the limbs and joints. Joshua12 observed objective improvement without toxicity following long-term therapy of two aged arthritic dogs. Ogilvie and Sutter13 reported rapid response to phenylbutazone therapy in a review of 19 clinical cases including posterior paralysis, posterior weakness, arthritis, rheumatism and other conditions associated with lameness and musculoskeletal weakness.
Camberos14 reported favorable results with phenylbutazone following intermittent treatment of thoroughbred horses for arthritis and chronic arthrosis (e.g. osteoarthritis of medial and distal bones of the hock, arthritis of the stifle and hip, arthrosis of the spine and generalized arthritis). Results were less favorable in cases of traumatism, muscle rupture, strains and inflammatory conditions of the third phalanx. Sutter15 reported favorable responses in chronic equine arthritis, fair results in a severely bruised mare, and poor results in two cases where the condition was limited to the third phalanx.
Phenylbutazone Tablets (1 g) Indications
Phenylbutazone possesses non-hormonal, anti-inflammatory activity of value in the management of musculoskeletal conditions in horses such as the arthritides, including osteoarthritis.
Phenylbutazone should not be administered to animals with serious heptic, renal or cardiac pathology, or those with a history of blood dyscrasia.
WarningPHENYLBUTAZONE SHOULD NOT BE ADMINISTERED TO MEAT, EGG OR MILK PRODUCING ANIMALS BECAUSE THE STATUS OF RESIDUES OF DRUG REMAINING IN EDIBLE TISSUES HAS NOT BEEN DETERMINED.
HAZARDS AND PRECAUTIONS:
1. Use with caution in animals with a history of drug allergy.
2. Stop medication at the first sign of gastrointestinal upset, jaundice or blood dyscrasia. Authenticated cases of agranulocytosis associated with phenylbutazone have occurred in man. Phenylbutazone induced blood dyscrasias have been reported in dogs. Thrombocytopenia and leukopenia are early manifestations followed by nonregenerative anemia. The occurrence of this reaction is not dose dependent and is unpredictable. To guard against this possibility, conduct routine blood counts at not more than 7 day intervals during the early course of therapy, and at intervals of not more than 14 days throughout the course of therapy. Any significant fall in the total white count, relative decrease in granulocytes or black or tarry stools should be regarded as a signal for immediate cessation of therapy and institution of appropriate treatment.
3. When treating inflammatory conditions associated with infection, specific anti-infective therapy is required.
4. Response to phenylbutazone therapy is prompt, usually occurring within 24 hours. If no significant clinical response is evident after 5 days of therapy, re-evaluate diagnosis and therapeutic regimen.
DOSAGE - HORSES:
1-2 grams per 500 lbs. body weight, not to exceed 4 grams daily.
1. Use a relatively high dose for the first 48 hours, then reduce gradually to a maintenance dose. Maintain lowest dose capable of producing the desired clinical response.
2. In many cases, tablets may be crushed and given with feed. Reduce the dosage as symptoms regress. In some cases treatment may be given only when symptoms appear with no need for continuous medication.
3. In animals, phenylbutazone is largely metabolized in 8 hours. It is recommended that a third of the daily dose be administered at 8 hour intervals.
4. Many chronic conditions will respond to phenylbutazone therapy but discontinuance of treatment may result in the recurrence of symptoms.
StorageStore at controlled room temperature, 20°-25°C (68°-77°F).
How SuppliedPhenylbutazone Tablets, U.S.P. are supplied in the following tablet concentration and package size:
1 gram tablets
Bottles of 100 tablets
1. Kuzell, W.C., Schaffarzick, R.W., Naugler, W.G., Mankle, E.A., A.M.A. Arch. Int. Med. 92:646,1953.
2. Kuzell, W.C., Schaffarzick, R.W., Brown, B., Mankle, E.A., Jour. Amer. Med. Assoc. 149:729,1952.
3. Kuzell, W.C., Schaffarzick, R.W., Cal. Med. 77:319,1952.
4. Payne, R.W., Shetlar, M.R., Farr, C., Hellbaum, A.A., and Ishmael, W.K.T., J. Lab. Clin. Med. 45:331,1955.
5. Flemming, J. and Will, G., Ann. Rheumat. Dis. 12:95,1953.
6. Denko, C.W., Ruml, D., Amer. Practit. 6:1865,1955.
7. Fabre, J. and Berger, A., Semaine Hop. (Paris) 31:87,1955.
8. Domenjoz, R., Theobald, W. and Morsdorf, K., Arzneimittel-Forsch. 5:488,1955.
9. Wilhelmi, G. and Pulver, R., Arzneimittel-Forsch. 5:221,1955.
10. Yourish, N., Paton, B., Brodie, B.B. and Burns, J.J., A.M.A. Arch. Ophth. 53:264,1955.
11. Lieberman, L.L., Jour. A.V.M.A. 125:128,1954.
12. Joshua, J.O., Vet. Rec. 68:60 (Jan. 21), 1956.
13. Ogilvie, F.B. and Sutter, M.D., Vet. Med. 52:492-494,1957.
14. Camberos, H.R., Rev. Med. Vet. (Buenos Aires) 38:9,1956.
15. Sutter, M.D., Vet. Med. 53:83 (Feb.), 1958.
EACH TABLET CONTAINS:
Phenylbutazone is a systemically active anti-inflammatory drug.
FOR ANIMAL USE ONLY
KEEP OUT OF REACH OF CHILDREN
Manufactured by: Bimeda, Inc., Le Sueur, MN 56058
Bimeda, Inc. is a division of Cross Vetpharm Group, Ltd.
Distributed by: MWI, Boise, ID 83705
NAC No.: 13150171
Distributed by MWI Veterinary Supply
3041 W. PASADENA DR., BOISE, ID, 83705
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