In-depth guide

UPDATED JUN 2026

Part of the Testosterone Therapy investigation

The short answer

The four essential evidence categories are: (1) TRT prescription or pharmacy records showing product, duration, and dose; (2) medical records documenting your cardiovascular injury (hospital records, discharge summaries, cardiac catheterization or imaging results); (3) a timeline showing TRT use preceded the cardiac event; and (4) any hematocrit or CBC lab results from during TRT use. An attorney can help obtain records via medical release authorization with no obligation.

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A strong testosterone therapy lawsuit requires documentation proving two things: (1) that you used a qualifying TRT product for a meaningful period before your injury, and (2) that you suffered a qualifying cardiovascular injury. Prescription records from your pharmacy (printable from most pharmacy portals) and hospital records from your cardiac event are the foundation of any TRT claim. The more complete and consistent these records, the stronger your case.

Additional helpful evidence includes: lab results showing elevated hematocrit or polycythemia during TRT use (supporting the biological causation mechanism); records of any physician monitoring — or failure to monitor — blood levels during therapy; and documentation of marketing materials you received about Low T. Many plaintiffs worry they have lost records — attorneys can often obtain them directly from providers, pharmacies, and insurance companies through medical release authorizations.

The full investigation

Part of the Testosterone Therapy Investigation