biostudies-literatureUnknown8(3)Xin LWuXi Biologics USA<h4>Background</h4>In drug development, placebo-controlled trials are vital for assessing treatment efficacy. Developing a suitable placebo for injectable biologics presents unique challenges, particularly in matching the physical characteristics of the active drug without containing its active pharmaceutical ingredient.<h4>Methods</h4>Our study developed a methodology for biologic placebo formulations, focusing on color and viscosity matching, in relevant chemical matrixes. A custom color deconvolution algorithm was used for precise color-matching, and sodium carboxymethyl cellulose (Na-CMC) was employed to adjust viscosity in different buffer systems. The interactions between buffers, color agents, and excipients were investigated to ensure consistency in physical properties. Stability tAntibody therapeutics177-188https://www.ebi.ac.uk/biostudies/studies/S-EPMC12202036biostudies-literatureMatching placebo development for injectable biologics-a practical tutorial.PMC12202036Xin LHashemi VLi XLi YZhang ZChen WQin GRen SShah KfalseMatching placebo development for injectable biologics-a practical tutorial.<h4>Background</h4>In drug development, placebo-controlled trials are vital for assessing treatment efficacy. Developing a suitable placebo for injectable biologics presents unique challenges, particularly in matching the physical characteristics of the active drug without containing its active pharmaceutical ingredient.<h4>Methods</h4>Our study developed a methodology for biologic placebo formulations, focusing on color and viscosity matching, in relevant chemical matrixes. A custom color deconvolution algorithm was used for precise color-matching, and sodium carboxymethyl cellulose (Na-CMC) was employed to adjust viscosity in different buffer systems. The interactions between buffers, color agents, and excipients were investigated to ensure consistency in physical properties. Stability t2025-01-01T00:00:00Z2025 Jul2026-06-03T12:12:36.878Z2026-04-27T03:11:41.997ZS-EPMC122020364058390710.1093/abt/tbaf009