HB 4806 revises civil litigation rules concerning the recovery of damages in Texas. It amends the Civil Practice and Remedies Code to modify procedures related to affidavits used to establish the reasonableness of medical expenses in personal injury lawsuits. The bill introduces new provisions that limit the admissibility of such affidavits and sets deadlines for parties seeking to contest them. It also restructures the calculation of future damages, defines new legal terms related to economic and noneconomic damages, and establishes additional restrictions on exemplary damages. The bill aims to refine evidentiary standards and procedural requirements in civil lawsuits​.