Rebutting Defense Experts Who Claim Pharmacy Overutilization

Amar Lunagaria — Co-Founder & Chief Pharmacist, LienScripts | March 29, 2026 | 8 min read

Defense experts in personal injury cases increasingly claim that pharmacy lien balances reflect overutilization rather than legitimate clinical need. This article provides the clinical and evidentiary framework PI attorneys need to rebut these opinions effectively.

Rebutting Defense Experts Who Claim Pharmacy Overutilization

Defense-retained medical experts increasingly opine that pharmacy lien balances in personal injury cases reflect overutilization — too many medications, for too long, at excessive doses. These opinions, when unchallenged, can reduce or eliminate pharmacy lien recovery at settlement or trial. The rebuttal framework requires understanding both the clinical basis for multi-drug therapy and the methodological weaknesses in defense expert opinions.

• Defense overutilization opinions typically target polypharmacy (number of medications), treatment duration, brand-name prescribing, and dose escalation
• Most defense experts apply population-level prescribing guidelines to individual patients without accounting for multi-system injury complexity
• LienScripts provides MERIT (Medication Evaluation & Rationale for Injury Treatment) documentation with pharmacist-level clinical rationale for each medication
• Effective rebuttal requires challenging the expert's methodology, not just their conclusions

[!KEY] Defense overutilization opinions almost always fail to account for the fundamental clinical reality that motor vehicle and personal injury accidents injure multiple biological systems simultaneously, each requiring a pharmacologically distinct medication — rebuttal should start with this foundational point.

The Standard Defense Overutilization Opinion

Defense pharmacy or medical experts typically structure their overutilization opinion around four claims:

Claim 1: "Too Many Medications" (Polypharmacy)

The expert counts the number of concurrent medications and declares the total excessive. A plaintiff on six medications is labeled as receiving "aggressive polypharmacy" that exceeds standard-of-care norms.

Rebuttal framework: Multi-system injury requires multi-mechanism therapy. A car accident producing cervical radiculopathy, lumbar disc herniation, post-traumatic migraine, and anxiety involves at least four distinct pathological processes. Each requires medication acting through a different pharmacological mechanism. According to James Wong, PharmD, founder of LienScripts, "Counting medications without counting injury systems is not a clinical opinion — it is an arithmetic exercise that ignores pathophysiology."

The appropriate clinical question is not "how many medications?" but "is each medication addressing a distinct clinical indication?" If each prescription maps to a documented injury system, polypharmacy is clinically appropriate multi-system treatment.

Claim 2: "Treatment Duration Is Excessive"

The defense expert argues that medications prescribed for soft tissue injuries should resolve within 6-12 weeks, and anything beyond that duration indicates overtreatment or secondary gain.

Rebuttal framework: Treatment duration guidelines assume uncomplicated soft tissue injuries in otherwise healthy patients. Personal injury plaintiffs frequently present with:

• Structural injuries (disc herniations, fractures, nerve root compression) that require longer treatment courses than soft tissue strains
• Central sensitization — a well-documented neurological phenomenon where chronic pain input rewires the central nervous system, requiring ongoing pharmacological management
• Co-morbid psychological conditions (PTSD, anxiety, depression) triggered by the accident that affect pain perception and require concurrent treatment

[!TIP] When cross-examining a defense expert on treatment duration, ask whether they reviewed the actual medical records showing ongoing objective findings at each visit, or whether they simply compared fill dates against a generic guideline timeline.

Claim 3: "Brand-Name Prescribing Was Unnecessary"

The expert identifies brand-name medications on the lien and calculates what the lien would have been at generic pricing, presenting the difference as waste or overcharging.

Rebuttal framework: This claim conflates two categories:

• Medications with no generic equivalent — drugs like suzetrigine (Journavx), CGRP antagonists (Qulipta, Nurtec), and certain extended-release formulations that have no generic version available. The brand-vs-generic comparison is impossible because no generic exists.
• Medications with a generic available — here, the prescribing physician exercised clinical judgment. The defense must produce a competing clinical opinion explaining why the brand was inappropriate for this specific patient, not merely that a generic exists in the abstract.

Claim 4: "Dose Escalation Indicates Overtreatment"

The expert notes that dosages increased over the treatment course and argues this represents unnecessary escalation rather than appropriate titration.

Rebuttal framework: Dose titration is standard clinical practice, not evidence of overtreatment. Nearly every pain medication, antidepressant, anticonvulsant, and muscle relaxant is initiated at a low dose and titrated upward based on clinical response. Starting at the full therapeutic dose without titration would be below the standard of care for most medications.

As Amar Lunagaria, PharmD, LienScripts' Chief Pharmacist explains, "When a defense expert criticizes dose escalation, they are criticizing the prescriber for following FDA-approved dosing guidelines — start low, titrate to effect. The alternative they implicitly suggest — starting at maximum dose or not increasing when symptoms are uncontrolled — would actually be substandard care."

Methodological Weaknesses in Defense Expert Opinions

Beyond the substantive clinical rebuttals, defense overutilization opinions frequently contain methodological flaws that are vulnerable on cross-examination:

1. Retrospective bias. The expert reviews the complete treatment course with knowledge of the outcome and criticizes decisions that were clinically reasonable at the time they were made. The treating physician did not have the benefit of hindsight.

2. Population guidelines applied to individuals. Clinical practice guidelines describe typical treatment courses for typical patients. They explicitly acknowledge that individual patients may require longer or more intensive treatment based on their specific clinical presentation.

3. Failure to examine the patient. Many defense pharmacy or medical experts opine on overutilization without ever examining the plaintiff. They review records and reach conclusions about clinical necessity without assessing the patient's actual condition.

4. Cherry-picking medications. The expert highlights the most expensive or longest-duration medications while ignoring the overall clinical picture that necessitated the treatment plan.

[!KEY] Always request the defense expert's complete file of prior PI opinions. Experts who consistently opine that every plaintiff is overtreated reveal a pattern of bias rather than independent clinical judgment.

Building the Rebuttal with MERIT Documentation

LienScripts generates a MERIT (Medication Evaluation & Rationale for Injury Treatment) report for every case, providing pharmacist-signed documentation for demand packages. The MERIT directly addresses overutilization claims by:

1. Mapping each medication to a specific injury system — demonstrating that polypharmacy reflects multi-system injury
2. Documenting clinical rationale — explaining why each medication was selected, including mechanism of action and standard-of-care support
3. Explaining dose titration — showing that dosage changes followed appropriate clinical titration protocols
4. Contextualizing treatment duration — connecting ongoing prescriptions to documented ongoing symptoms in the medical record

The MERIT provides the clinical counternarrative that a defense overutilization opinion attempts to displace.

Cross-Examination Questions for the Defense Expert

Prepare these questions when facing a defense overutilization opinion:

1. "Did you examine the plaintiff?"
2. "For each medication you identified as unnecessary, can you identify which documented injury system it was not treating?"
3. "Are you aware that [medication] has no generic equivalent?"
4. "Does [clinical practice guideline you cited] state that all patients should discontinue treatment after [X weeks], or does it acknowledge individual variation?"
5. "In how many of your last 50 PI cases did you conclude that the pharmacy lien was appropriate and not excessive?"

Contact LienScripts to discuss MERIT documentation for rebutting defense overutilization opinions in your cases.

Related Resources

• Top Adjuster Attacks on Pharmacy Liens — And How to Rebut Them
• Myth: Multiple Prescriptions Mean Over-Treatment
• Expert Witness Pharmacy Testimony in PI Cases
• Trial Preparation: Pharmacy Evidence