Information overload has become a critical concern in the era of big data, where organizations face challenges in processing, analyzing, and interpreting massive volumes of data. This systematic review examines the antecedents, consequences, and mitigation strategies for information overload in big data environments. By reviewing 85 peer-reviewed articles published between 2010 and 2025, the study categorizes the key sources of overload, identifies organizational and individual-level outcomes, and evaluates technological and managerial solutions. The findings emphasize the need for intelligent data filtering, adaptive visualization, automated decision-support systems, and cognitive-aligned interface design. The review contributes a synthesized model for understanding information overload in big data contexts and proposes future research directions.