Analgesic

Brand Name

Concentration

Dose and Route

Frequency

Aspirin

Various

Adult = 325mg/tablet

10-25mg/kg PO

every 8-12 hrs 

Buprenorphine

Buprenex

0.3mg/ml

0.01-0.02mg/kg SC, IM

every 8-12 hrs 

Butorphanol

Torbugesic

10mg/ml

0.2-1.2mg/kg SC, IM
0.05-0.2mg/kg IV

every 2-5 hrs 

Ketoprofen

Orudis
Ketofen

50mg/tablet
100mg/ml

1mg/kg PO, IV

every 24 hrs 

Nalbuphine

Nubain

10mg/ml

0.5-2.0mg/kg
SC, IM, IV

every 3-8 hrs 

Phenylbutazone

Butazolidin

100mg/tablet

15-22mg/kg PO 
**not to exceed 800mg/day

every 8-12 hrs 

Rimadyl

Carprofen

various sizes

1mg/lb PO
2.2mg/kg

every 12 hrs 

Fentanyl patch
(sustained analgesia)

25µ gm patch for dogs <10kg,
50µ gm patch for dogs 10-20kg
75µ gm patch for dogs 20-30kg
100 µ gm patch for dogs >30kg. 

Shave an area on the dorsal neck and
apply the patch. Cover with vetwrap.
*Apply patch 24 hr prior to surgery to reach steady state. 
Remove patch 3-5 days after date of
application.