Antimicrobial Stewardship in Feline Abscesses: Incision and Drainage vs Antibiotics

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-08-11

Key Takeaways

• Incision and drainage is the definitive treatment for feline abscesses, with systemic antimicrobials indicated only for specific circumstances such as systemic signs (fever, lethargy, anorexia), extensive cellulitis, immunocompromise, or inadequate surgical drainage.
• The pathophysiology of feline abscesses involves polymicrobial inoculation, predominantly anaerobes and Pasteurella multocida, forming a walled-off cavity with poor antimicrobial penetration, making drainage paramount over drug concentration.
• Cytology is mandatory prior to antimicrobial decisions to confirm septic inflammation and guide initial drug selection based on bacterial morphology, while culture and susceptibility testing are indicated for recurrent, complicated, or unresponsive abscesses, or in immunocompromised cats.
• Expected microbiology includes anaerobes and Pasteurella multocida, with increasing concern for coagulase-positive staphylococci and Gram-negative opportunists exhibiting resistance to common beta-lactams and other agents, necessitating careful drug selection and reassessment.
• Stewardship considerations include owner compliance, the availability of rapid diagnostics for culture, and the judicious use of broad-spectrum agents, particularly long-acting injectables like cefovecin, which should be reserved for situations where oral administration is genuinely impossible and infection is confirmed.
• Monitoring for resolution of swelling, fever, and inappetence within 48 to 72 hours is critical, with recurrence or lack of improvement prompting re-exploration, imaging, and culture to identify undrained loculations, foreign bodies, or resistant organisms.

Feline abscesses, most often resulting from bite wounds sustained during territorial conflict, represent one of the most common presentations in small animal practice. The management of these infections sits at a practical crossroads: surgical drainage is the definitive intervention, yet systemic antimicrobials are frequently prescribed as a default accompaniment. This article examines the evidence base for that combination, the clinical reasoning that should govern antimicrobial selection, and the specific circumstances in which antibiotics are genuinely required. It is written for practicing veterinarians seeking a structured approach to a routine but stewardship-relevant presentation.

The central clinical question is not whether abscesses need treatment, but whether every abscess needs antibiotics once drainage has been achieved. Answering that question requires an understanding of the microbiology of feline bite wounds, the pharmacokinetic realities of antimicrobial penetration into walled-off purulent cavities, and the ecological consequences of prescribing broad-spectrum agents. The article also addresses the practical barriers that influence prescribing, including client expectations, difficulty administering oral medication, and the availability of rapid diagnostics. These factors, documented in surveys of veterinary prescribing behavior, shape daily decisions as much as microbiological evidence does.

At a Glance

Pathophysiology of Feline Bite Wound Abscessation

A feline bite wound delivers a polymicrobial inoculum deep into subcutaneous tissue through a small puncture that seals rapidly. The inoculated bacteria, primarily anaerobes such as Fusobacterium and Porphyromonas species alongside facultative organizms including Pasteurella multocida and staphylococci, encounter devitalised tissue and a reduced redox potential. The resulting infection progresses to suppuration within 48 to 72 hours, producing a walled-off cavity filled with necrotic debris and viable bacteria.

The abscess wall presents a pharmacokinetic barrier. Systemic antimicrobials penetrate the cavity poorly because the capsule has limited vascularity and the purulent contents are acidic, protein-rich, and often contain bacterial enzymes that degrade beta-lactam antibiotics. This is the fundamental reason why drainage, not drug concentration, is the rate-limiting step in resolution. Once the cavity is opened and lavaged, the host immune response can access the infection site, and the need for systemic antimicrobial support diminishes substantially.

Microbiology and Resistance Patterns

The bacterial population within a feline abscess is typically mixed, with anaerobes outnumbering aerobes. Pasteurella multocida is the most frequently isolated aerobic pathogen and remains predictably susceptible to beta-lactams, though resistance profiles vary regionally. Coagulase-positive staphylococci, particularly Staphylococcus pseudintermedius, are also recovered from feline skin infections, and their resistance patterns warrant attention. A one-year Australian surveillance study of coagulase-positive staphylococci from companion animals identified methicillin-resistant strains across dogs, cats, and horses, with resistance limiting therapeutic options in clinical infections. The same study noted that prior antimicrobial treatment was a risk factor for methicillin resistance, reinforcing the principle that each prescription carries an ecological cost.

Gram-negative opportunists add further complexity. A retrospective analysis of feline skin infections in Italy found coagulase-negative staphylococci to be the predominant isolates, with notable resistance to amoxicillin-clavulanate, penicillin, clindamycin, and trimethoprim-sulfamethoxazole. Multidrug-resistant strains were detected, and the authors called for updated resistance profiling to support stewardship efforts. The broader emergence of multidrug-resistant organizms such as Acinetobacter baumannii in companion animal habitats, documented in a systematic review of environmental niches, underscores that resistance reservoirs are no longer confined to hospital settings.

The Role of Surgical Drainage

Incision and drainage is the definitive treatment for a mature abscess. The procedure converts a closed, walled-off infection into an open, drainable wound that can be managed with lavage and secondary intention healing. General anesthesia or heavy sedation is usually required to allow adequate exploration, debridement of necrotic tissue, and placement of a drain when the cavity is large or dependent drainage is otherwise compromised.

The decision to prescribe antibiotics should follow, not precede, the surgical assessment. If the abscess is fully drained, the cavity is lavaged, and the cat is systemically well, antimicrobial therapy may be unnecessary. This position aligns with stewardship guidance from professional bodies that emphasize confirming infection, identifying the causative organizm, and selecting antimicrobials only when they will alter the outcome. The AVMA antimicrobial stewardship resources frame judicious use as a professional obligation, and the MSD Veterinary Manual similarly advises that drainage alone resolves many abscesses.

When Antibiotics Are Indicated

Systemic antimicrobials are indicated when the infection has extended beyond the walled-off cavity. Fever, lethargy, anorexia, regional lymphadenopathy, or spreading cellulitis signal invasive infection that will not be controlled by drainage alone. Immunocompromised cats, including those with retroviral infection, diabetes mellitus, or chronic glucocorticoid therapy, have reduced capacity to clear residual bacteria and merit antimicrobial coverage. The same applies when surgical drainage is incomplete, when the abscess has ruptured into a body cavity, or when the wound is located in an area where dependent drainage cannot be established.

Culture and susceptibility testing should be performed when the cat has received prior antimicrobials, when the abscess is recurrent, or when the clinician suspects a resistant organizm. The cost and turnaround time of culture are frequently cited by veterinarians as barriers to its use, as documented in a survey of Australian practitioners, yet the same survey found that fear of losing clients and colleague pressure were not considered significant barriers. This suggests that the primary obstacle is logistical instead of social, and that improved access to rapid diagnostics would meaningfully shift prescribing behavior.

Stewardship Considerations in Practice

The choice of antimicrobial, when one is needed, should be guided by expected pathogens and local resistance data. Beta-lactams with anaerobic coverage remain reasonable first-line options, but the resistance patterns reported in feline skin isolates mean that response must be reassessed at 48 to 72 hours. If clinical improvement is not evident, the diagnosis and the antimicrobial choice must both be revisited.

Long-acting injectable antimicrobials such as cefovecin are frequently used in feline practice, particularly when owners cannot administer oral medication. An analysis of electronic health records from UK first-opinion practices found that cefovecin was most commonly prescribed for skin conditions, with inability to orally medicate the cat cited as the leading reason for its selection. The same study noted that microbiological evaluation was recorded in only a small proportion of cases. This pattern illustrates a stewardship tension: the convenience of a long-acting third-generation cephalosporin must be weighed against its broad spectrum and importance to human medicine. Where oral administration is feasible and the infection is localized, a narrower agent is preferable.

Clinical Assessment and Decision Sequence

The decision to prescribe antibiotics for a feline abscess begins before the cat is examined. The history should establish the time since the suspected bite or injury, whether the cat is indoor-only or has outdoor access, vaccination status, and any prior antimicrobial exposure within the preceding 90 days. Prior treatment matters because it shifts the probability of resistant organizms and changes the expected response to first-line drugs. Australian surveillance data from companion animal staphylococcal isolates show that methicillin resistance is present in feline clinical samples, and prior antimicrobial use is a recognized risk factor for resistant infection Saputra et al., 2017.

The physical examination determines the severity tier. A simple abscess is a localized, fluctuant swelling with intact overlying skin, no systemic signs, and no significant comorbidity. A complicated abscess shows one or more of the following: fever, lethargy, anorexia, cellulitis extending beyond the swelling, multiple tracts, foreign body presence, or involvement of a joint, tendon sheath, or body cavity. The third category is the recurrent abscess, defined as a second episode at the same site within 30 days or a third episode at any site within 12 months.

Cytology is mandatory before any antimicrobial decision. A fine-needle aspirate of the contents, stained with Diff-Quik or Gram stain, distinguishes septic suppurative inflammation from sterile eosinophilic or neutrophilic inflammation. The presence of degenerate neutrophils with intracellular bacteria confirms infection. The bacterial morphology on Gram stain guides initial drug selection when systemic therapy is justified, although culture is preferred where resistance risk is high. The guidelines for bacterial skin infection diagnosis from Beco et al. emphasize that cytology confirms infection, identifies the bacterial population, and provides a baseline for monitoring response.

Culture and susceptibility testing is indicated when the abscess is complicated, recurrent, or the cat has received antibiotics within the preceding 90 days. It is also indicated when the cat is immunocompromised, including retroviral infection, diabetes mellitus, or chronic glucocorticoid use. The cost of culture is cited by Australian veterinarians as a barrier to appropriate prescribing, but the same survey found that fear of losing clients and colleague pressure were not considered significant barriers Norris et al., 2019. This suggests that the barrier is practical instead of social, and practices should consider in-house culture systems or reduced-cost reference laboratory pathways for recurrent cases.

Decision Points That Change the Plan

The first decision point is whether the abscess is open and draining adequately after incision. If the cavity is fully explored, all loculations are broken down, and the wound is left open to drain, the need for systemic antibiotics decreases substantially. The second decision point is the presence of systemic signs. A cat with a temperature above 39.5°C, lethargy, or anorexia has bacteremia risk and warrants systemic therapy. The third decision point is the anatomical site. Abscesses over joints, the orbit, the prepuce, or the mammary chain carry structural risk that justifies antibiotics even without systemic signs.

The fourth decision point is the cat's immune status. Feline immunodeficiency virus and feline leukemia virus infections impair neutrophil function and wound healing, and these cats merit a lower threshold for antimicrobial therapy. The fifth decision point is the owner's ability to administer medication. The UK electronic health record study of cefovecin use found that the most cited reason for choosing a long-acting injectable over oral alternatives was an inability to orally medicate the cat Burke et al., 2017. This is a legitimate stewardship consideration, but it should not override the clinical indication. An injectable antibiotic given without surgical drainage does not compensate for inadequate wound management.

Surgical Technique and Equipment

The procedure requires clippers, surgical scrub, a number 11 or 15 scalpel blade, curved Mayo scissors, a sterile probe or closed hemostat, sterile saline for lavage, and a drain material. The cat is positioned to allow dependent drainage from the incision site. The area is clipped widely, at least 2 cm beyond the palpable margin of the swelling, and prepared with chlorhexidine or povidone-iodine. The incision is made at the most dependent point of the abscess, parallel to skin tension lines where possible. The incision length should be sufficient to allow digital or instrument exploration of the entire cavity, typically 1 to 2 cm for a simple abscess.

The cavity is explored with a sterile probe or closed hemostat to break down all fibrous loculations. All necrotic tissue is debrided. The cavity is lavaged copiously with warm sterile saline, using a 20 mL syringe and an 18 gauge catheter or teat cannula. Lavage volume should be generous, typically 100 to 250 mL for a moderate abscess, until the effluent is clear. The wound is left open. A Penrose drain is placed when the cavity is deep, when there is significant dead space, or when the abscess is in a location where dependent drainage is difficult to maintain. The drain is sutured in place with a single non-absorbable suture at the skin edge and is removed when drainage ceases, usually at 48 to 72 hours.

The decision to place a drain is based on cavity depth and location, not on the perceived severity of infection. A superficial abscess with a wide open incision does not require a drain. A deep abscess over the masseter or cervical region benefits from a drain because dependent drainage is difficult to achieve with incision alone.

Monitoring Parameters

The cat is reassessed at 48 to 72 hours. The parameters that matter are wound drainage, wound margin appearance, pain on palpation, temperature, appetite, and demeanour. Each parameter detects a different failure mode.

The owner is instructed to monitor the wound for discharge, swelling, and the cat's appetite and activity. They should be told to return if the cat stops eating, becomes lethargic, or if the wound becomes increasingly swollen or painful. Warm compresses are applied twice daily to promote drainage and comfort, but the evidence base for this practice is limited and it should not replace surgical drainage.

Documentation and Stewardship Recording

The medical record should document the abscess location, size, cytology findings, whether culture was performed and why, the surgical procedure performed, whether a drain was placed, and the antibiotic decision with the rationale. If antibiotics are withheld, the record should state the clinical reasoning and the planned reassessment point. If antibiotics are prescribed, the record should note the drug, the expected duration, and the review date. This documentation supports the AVMA antimicrobial stewardship principles by making prescribing decisions explicit and auditable.

Practices should track their own abscess cases to identify patterns. A practice that prescribes antibiotics for every abscess, regardless of drainage adequacy, should review whether the surgical technique is consistent. A practice with a high rate of recurrent abscesses should examine whether culture is being performed at the second presentation. The WOAH terrestrial animal health standards frame antimicrobial resistance as a shared responsibility across animal and human health sectors, and practice-level surveillance is a concrete contribution to that effort.

Antibiotic Decision Table

The following table integrates the assessment findings into a prescribing decision. It assumes that surgical drainage has been performed or is being performed concurrently.

The correct choice changes with patient status and available equipment. A practice without reliable anesthesia for thorough exploration may need a lower threshold for antibiotics because the surgical drainage is less complete. A practice with in-house culture and rapid susceptibility testing can withhold antibiotics more confidently and treat precisely when needed. The FDA animal drug information resources should be consulted for current label indications and extralabel use considerations when selecting any antimicrobial.

Recognized Complications and Early Detection

Abscess recurrence is the most common failure after incision and drainage. A returning swelling within 48 to 72 hours usually indicates inadequate drainage, a loculated cavity, or a foreign body such as a broken tooth fragment or embedded claw. Early detection relies on re-examination at 48 hours, not owner report alone. Palpate the entire wound bed for residual fluctuance and compare the surgical site to the contralateral side. Ultrasonography can distinguish a fluid pocket from postoperative edema when palpation is equivocal.

Tissue necrosis and delayed healing follow aggressive curettage or excessive thermal injury from electrosurgery. The wound edges appear pale or blackened, and exudate becomes serosanguinous instead of purulent. Detect this by inspecting the wound at each dressing change and by noting whether granulation tissue appears by day 5 to 7. If necrosis is present, debride conservatively and reconsider the original surgical approach.

Fistula formation suggests an undrained deep pocket or a retained foreign body. A persistent draining tract that fails to close within 10 to 14 days warrants contrast radiography or fistulography under sedation. Probe the tract gently to identify its depth and direction before further surgery.

Spread of infection to deeper structures, including septic arthritis, tenosynovitis, or osteomyelitis, occurs when bite wounds overlie joints or tendon sheaths. Cats with bite wounds over the carpus, tarsus, or digits are at particular risk. Detect these complications by assessing for lameness out of proportion to the skin wound, pain on joint flexion, and swelling along the tendon sheath. Radiography and arthrocentesis are indicated when these signs appear.

Common Errors and Corrective Actions

The most frequent error is prescribing antibiotics without performing drainage, or performing drainage that is too conservative. A stab incision that does not fully open the abscess cavity leaves dependent pockets that re-accumulate. Correct this by making an incision long enough to expose the entire cavity, breaking down all loculations digitally, and placing a drain that exits at the most dependent point.

A second error is closing the wound primarily after drainage. Feline bite wound abscesses are contaminated by definition, and primary closure traps bacteria beneath the skin. Leave the wound open to heal by second intention, or at most place a loose, partial closure if the cavity is superficial and small.

A third error is relying on visual inspection of purulent material to guide antibiotic choice. Gross appearance does not predict bacterial species or resistance profile. Cytology distinguishes bacterial from sterile inflammation, and culture is required when infection is deep, recurrent, or unresponsive. The cost of culture and susceptibility testing is a recognized barrier to appropriate prescribing, yet it remains the only reliable way to detect methicillin-resistant coagulase-positive staphylococci, which are increasingly recognized as opportunistic pathogens in companion animals.

A fourth error is discharging the cat without a scheduled recheck. Owners cannot reliably assess wound healing or detect early complications. Schedule a 48-hour recheck for drain management and a 10 to 14 day recheck for healing confirmation.

Limitations of the Evidence and Areas of Disagreement

The evidence base for antibiotic use in feline abscesses is thin. No large randomised controlled trial has compared incision and drainage alone against drainage plus antibiotics for first-presentation abscesses. Expert opinion therefore drives most recommendations, and opinions differ on several points.

One contested area is whether any antibiotic is needed after complete drainage of a simple, localized abscess in an otherwise healthy cat. Some clinicians withhold antibiotics entirely when drainage is thorough and the cat is systemically well. Others prescribe a short course citing the risk of undetected bacteremia. Both positions are defensible given the absence of comparative data.

A second area of disagreement concerns the choice of first-line antibiotic when one is indicated. Amoxicillin-clavulanate is commonly used, but resistance to this agent has been documented among staphylococci and other isolates from feline skin infections. Some authors now recommend amoxicillin alone or a first-generation cephalosporin as first-line, reserving broader agents for culture-confirmed resistance.

A third area concerns the role of long-acting injectable antibiotics such as cefovecin. Electronic health record data from UK first-opinion practices show that cefovecin is frequently used for feline skin infections, often because owners cannot medicate cats orally. However, the same data show that microbiological evaluation is performed in only a minority of these cases, raising stewardship concerns about empirical use of a third-generation cephalosporin.

Referral, Laboratory Involvement, and Regulatory Reporting

Referral is warranted when infection recurs after adequate drainage, when a foreign body cannot be identified or removed, when deep structures are involved, or when the cat is systemically unwell despite appropriate initial therapy. Specialist consultation is also appropriate when cytology shows organizms but culture has not been performed and the infection is not responding.

Laboratory involvement should be proactive instead of reactive. Submit culture and susceptibility testing for any abscess that is recurrent, deep, or unresponsive to first-line therapy, and for any cat with suspected multidrug-resistant infection. The presence of Acinetobacter baumannii, a multidrug-resistant opportunistic pathogen increasingly found in companion animals, should prompt laboratory confirmation and heightened infection control measures.

Regulatory reporting obligations vary by jurisdiction. Veterinarians should be aware of their local requirements regarding notifiable diseases and adverse drug event reporting. Suspected treatment failures associated with antimicrobial products should be reported through the appropriate pharmacovigilance pathway, and prescribing decisions should align with current professional stewardship guidance.

Troubleshooting Table

Frequently Asked Questions

How Do I Manage an Abscess When Surgical Drainage Is Not Feasible in My Setting?

When ideal surgical equipment or general anesthesia is unavailable, the decision framework shifts. Needle decompression with a large-bore catheter can reduce purulent tension, followed by repeated flushing through the same catheter. This is less effective than formal incision because dependent drainage is compromised and the tract may seal prematurely. Systemic antibiotics become more important in this scenario, particularly if the cat is febrile, lethargic, or immunocompromised. Document clearly why the preferred approach was modified. Referral should be considered when the abscess is deep, involves fascial planes, or the cat deteriorates despite decompression. The AVMA antimicrobial stewardship resources support using the least invasive effective option while acknowledging resource constraints.

What Should I Tell an Owner Who Insists on Antibiotics for a Simple Abscess?

Explain that the pus has been drained and the wound is now open and flushing. The infection source is removed, and the cat's own immune response, supported by wound care, is usually sufficient. Frame antibiotics as a targeted tool, not a default. Note that unnecessary antibiotic exposure selects for resistant bacteria, which matters for the cat and for household members. The FDA Center for Veterinary Medicine and AVMA antimicrobial use guidance both emphasize reserving antimicrobials for confirmed or strongly suspected bacterial infection. If the owner remains anxious, offer a recheck in 48 hours and explain the specific signs that would trigger antibiotic initiation. This converts the conversation from refusal to a monitored plan.

When Should I Choose a Long-Acting Injectable Antibiotic Over an Oral Course?

Long-acting injectables suit cats that resist oral medication, but they are not interchangeable with oral therapy. A UK electronic health record study found that inability to orally medicate was the most cited reason for choosing cefovecin, yet microbiological evaluation was recorded in only a small fraction of those cases. The drug's prolonged tissue persistence means an adverse reaction cannot be quickly reversed, and resistance selection pressure lasts longer. Reserve injectables for confirmed bacterial infection where oral administration is genuinely impossible, the cat is hospitalized, or compliance failure is likely. For a simple drained abscess in a cooperative cat, oral therapy or no antibiotic remains preferable. Document the reason for choosing the injectable route in the medical record.

How Does This Approach Differ for Diabetic or FIV-Positive Cats?

Immunocompromised cats warrant a lower threshold for systemic antibiotics even after adequate drainage. Their wound healing is slower, and bacterial clearance is less efficient. Cytology becomes more important: if intracellular bacteria are seen in neutrophils, antibiotics are indicated. Culture and susceptibility testing should be performed before starting therapy in these patients because prior antimicrobial exposure is common and resistance is more likely. The microbiology of feline skin infections includes coagulase-negative staphylococci as a frequent isolate, and resistance to commonly used drugs is documented. Monitor these cats more closely, with rechecks at 48 and 96 hours. Glycaemic control in diabetics should be confirmed, as poor control impairs neutrophil function and delays resolution.

What Records Should I Keep for Stewardship Audits?

Record the abscess location, drainage method, whether purulent material was submitted for culture, and the cytology findings. If antibiotics were prescribed, note the drug, dose, route, duration, and the specific indication that justified use. Record any reason for deviating from the clinic's standard protocol, such as owner non-compliance or inability to medicate. The AVMA practice resources provide templates for antimicrobial use logs. These records allow retrospective review of prescribing patterns and support discussions with colleagues about case selection. They also protect you if a complication arises later. A simple entry takes under a minute and creates data that can inform future protocol revisions.

How Do I Handle a Recurrent Abscess at the Same Site?

Recurrence at the same location suggests an undrained pocket, a foreign body, or an underlying structural lesion such as a salivary mucocele or dentigerous cyst. Repeat drainage alone is insufficient. Obtain imaging, preferably ultrasound or computed tomography, to identify the extent before re-exploring. Submit tissue and pus for aerobic and anaerobic culture, as prior antibiotic exposure may have selected resistant organizms. The systematic review of Acinetobacter baumannii highlights that multidrug-resistant opportunistic pathogens are increasingly found in companion animals, so culture is not optional in recurrent cases. Review the original surgical approach for technical errors, such as an incision too small for dependent drainage. Consider referral for advanced imaging and surgical exploration if the second drainage fails to resolve the lesion.

Related Clinical & Scientific Guides

• Veterinary Formulary Essentials: Navigating Drug References
• Drug Interactions with Antiepileptic Drugs in Veterinary Patients: Managing Polypharmacy
• Drug Interactions with Corticosteroids in Veterinary Patients: A Comprehensive Review

References and Further Reading

• Antimicrobial resistance in coagulase-positive staphylococci isolated from companion animals in Australia: A one year study.. 2017.
• Factors influencing the behavior and perceptions of Australian veterinarians towards antibiotic use and antimicrobial resistance.. 2019.
• <i>Acinetobacter baumannii</i>, a Multidrug-Resistant Opportunistic Pathogen in New Habitats: A Systematic Review.. 2024.
• On Gram-Positive- and Gram-Negative-Bacteria-Associated Canine and Feline Skin Infections: A 4-Year Retrospective Study of the University Veterinary Microbiology Diagnostic Laboratory of Naples, Italy.. 2021.
• Use of cefovecin in a UK population of cats attending first-opinion practices as recorded in electronic health records.. 2017.
• Suggested guidelines for using systemic antimicrobials in bacterial skin infections (1): diagnosis based on clinical presentation, cytology and culture.. 2013.
• FDA Center for Veterinary Medicine: Animal Drug Information. FDA CVM.
• AVMA Antimicrobial Use and Stewardship. American Veterinary Medical Association.
• MSD Veterinary Manual, Professional Edition. MSD Veterinary Manual.

Related Articles

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• Antimicrobial Stewardship in Feline Urinary Tract Infections: When to Treat and When to Wait
• Antimicrobial Stewardship in Food Animals: Principles and Practical Application
• Antimicrobial Stewardship in Equine Practice: Challenges and Solutions

This article is educational professional reference material for veterinary audiences. It is not a substitute for veterinary diagnosis, individual clinical judgment, current product labeling, or applicable regulatory requirements.