U.S. Prescribing Information for Rimadyl

From Pfizer Web sites: http://www.rimadyl.com/display.asp?country=US&lang=EN&drug=RC&species=CN&sec=660
QUOTE:
DOSAGE AND ADMINISTRATION: Always provide Client Information Sheet with prescription. The recommended dosage for oral administration to dogs is 2 mg/lb (4.4 mg/kg) of body weight daily. The total daily dose may be administered as 2 mg/lb of body weight once daily or divided and administered as 1 mg/lb (2.2 mg/kg) twice daily. For the control of postoperative pain, administer approximately 2 hours before the procedure. Rimadyl tablets are scored and dosage should be calculated in half-tablet increments. Tablets can be halved by placing the tablet on a hard surface and pressing down on both sides of the score. Rimadyl chewable tablets are palatable and willingly consumed by most dogs when offered by the owner. Therefore, they may be fed by hand or placed on food. Care should be taken to ensure that the dog consumes the complete dose.
END QUOTE

Rimadyl Chewables Overview

See also: http://www.rimadyl.com/product_overview.asp?country=US&lang=EN&drug=RC&species=CN&sec=630
The following is taken from the Dec. 2000 Rimadyl Technical Bulletin and it speaks of "washout" periods before switching from one NSAID to another - or from an NSAID to a STEROID!
QUOTE:
Table 1: Withdrawal (washout) times
Once one NSAID is discontinued, a minimum of 48 to 72 hours should be allowed before initiation of another NSAID.
When switching from aspirin to another NSAID, a washout period of 10 to 14 days is advised to minimize the carryover of aspirin-induced platelet dysfunction.
Prednisone to an NSAID?allow at least 1 week.
Long-acting corticosteroid to an NSAID?allow at least 3 to 4 weeks.
END QUOTE
It is NOT recommended that Rimadyl be given in conjunction with a steroid!