Phenylbutazone

Tablets or Paste

Phenylbutazone Tablets

Tablets: The oral dose for horses is two (2) to four (4) tablets (2 to 4 g) per 1,000 lbs. of body weight per day. The total daily dose should be limited to four (4) tablets per day. Because of the relatively short half-life of the drug, administration every eight (8) hours is the most satisfactory schedule.

The response to phenylbutazone is usually prompt. If there is not a significant clinical effect in five (5) days, a re-evaluation of the diagnosis and treatment should be made.

Phenylbutazone Tablets

Phenylbutazone Paste:

Paste: Administer 1 to 2 g of phenylbutazone per 500 lbs. of body weight, but not to exceed 4 g daily. Oral cavity should be empty. Deposit paste on back of tongue by depressing plunger that has been previously set to deliver the correct dose.
Guidelines to Successful Therapy:
1. Use a relatively high dose for the first 48 hours, then reduce gradually to maintenance dose. Maintain the lowest dose capable of producing the desired clinical response.
2. Response to PHENYLBUTAZONE therapy is prompt, usually occurring within 24 hours. If no significant clinical response is evident after five (5) days, re-evaluate the diagnosis and the therapeutic approach.
3. When administering PHENYLBUTAZONE, the oral cavity should be empty. Deposit paste on back of tongue by depressing plunger that has been previously set to deliver the correct dose.
4. Many chronic conditions will respond to PHENYLBUTAZONE therapy, but discontinuance of treatment may result in recurrence of symptoms.

Phenylbutazone Paste