Liposomal bupivacaine (LB; Nocita, Elanco) carries two FDA-labeled indications: peri-incisional infiltration in dogs following cranial cruciate ligament surgery, and peripheral nerve block in cats undergoing onychectomy. All other uses — including soft tissue surgery, ovariohysterectomy, gastrointestinal surgery, and limb amputation — are off-label. Journal of the…+3
The labeled dose and route differ by species and indication. The maximum labeled dose in dogs is 5.3 mg/kg bupivacaine base administered as a single peri-incisional subcutaneous infiltration at the time of surgical closure. FDA DailyMed An… In cats, LB is labeled as a peripheral nerve block (not infiltration) for onychectomy. Journal of the…+1 The WSAVA guidelines confirm that the product provides up to 72 hours of postoperative analgesia following perineural administration in cats undergoing distal limb procedures and following infiltration in dogs undergoing cranial cruciate ligament surgery. WSAVA Global Gu…
For peri-incisional infiltration in dogs, LB is injected into the subcutaneous tissues surrounding the incision at the time of closure. The liposomal vesicle structure releases bupivacaine slowly over time, with analgesia onset similar to standard bupivacaine and duration up to 72 hours. Journal of the…+1 Because LB does not diffuse appreciably through tissue planes, incomplete blockade is a recognized limitation — in dogs undergoing enucleation treated with peri-incisional LB, 20% still required rescue analgesia, and most patients demonstrated only partial blockade on sensory threshold testing. Journal of the… LB is therefore recommended as one component of a multimodal analgesic protocol rather than as a sole agent. Journal of the…
A critical contraindication applies to injection technique: LB must not be mixed with or injected concurrently at the same site as amide local anesthetics (lidocaine, bupivacaine HCl, mepivacaine, ropivacaine), as these agents disrupt the liposomal membrane and accelerate bupivacaine release, negating the extended-duration benefit. AAHA Clinical G… Standard bupivacaine HCl is pharmacologically distinct from the liposomal formulation and the two should not be combined. AAHA Clinical G…
Injection site histopathology in dogs reveals a predictable local tissue reaction. At doses of 8–26.6 mg/kg (1.5–5× the labeled maximum of 5.3 mg/kg), subcutaneous granulomatous inflammation with vacuolated macrophages, lymphocytes, plasma cells, multinucleated giant cells, mineralization, and edema was observed at injection sites; these changes were not seen in saline or bupivacaine HCl control groups. FDA DailyMed An… At the labeled dose, all dogs survived without clinically relevant systemic effects on ECG, hematology, serum chemistry, urinalysis, coagulation, or organ weights. FDA DailyMed An… Injection site inflammation partially resolved during a 4-week recovery period. FDA DailyMed An…
Incisional complication rates are a relevant safety consideration for off-label soft tissue use. The overall wound complication rate following peri-incisional LB in dogs was 19.7%, with clean-contaminated and contaminated surgeries carrying complication rates of 23.1% and 30.8%, respectively, and an overall surgical site infection rate of 5%. Journal of the… A separate report found an incisional complication rate of 10.8% in dogs receiving LB during foreign body surgery, compared to a lower rate in dogs that did not receive LB. Journal of the… In contrast, LB use following gastrointestinal surgery in dogs and cats was not associated with a higher rate of surgical site infections or multidrug-resistant infections in one study. Journal of the…
| Indication | Labeled Status | Route | Max Dose / Duration | Key Caveat |
|---|---|---|---|---|
| Dog — CCL surgery | FDA-labeled | Peri-incisional subcutaneous infiltration | 5.3 mg/kg bupivacaine base, single dose; up to 72 h analgesia | Do not combine with amide local anesthetics |
| Cat — onychectomy | FDA-labeled | Peripheral nerve block | Single dose; up to 72 h analgesia | Not studied in cats < 5 months of age WSAVA Global Gu… |
| Dog/cat — all other surgeries | Off-label | Varies by procedure | Same 72 h duration claimed; efficacy variable | Higher wound complication rates in contaminated soft tissue cases Journal of the… |
Would you like a breakdown of the efficacy evidence for off-label LB use in specific procedures (ovariohysterectomy, gastrointestinal surgery, or enucleation)?