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Yellow Phosphorus (YP) poisoning is an infrequent, yet severe medical condition characterised by multi-systemic toxicity. The ingestion or inhalation of YP can lead to gastrointestinal irritation, hepatic injury, and Acute Liver Failure (ALF). Plasmapheresis, a therapeutic intervention involving the removal and replacement of plasma components, is a potential adjunctive treatment for YP poisoning. This case report aims to explore the mechanistic rationale, clinical efficacy, and safety considerations of plasmapheresis in the management of this toxicological emergency. Here, a 16-year-old female reported to the Emergency Department (ED), having consumed 1-2 g of Ratol poison at two different times of the day. She came to the hospital on day 4 post-consumption. On admission, the patient was jaundiced and Arterial Blood Gas (ABG) analysis was suggestive of respiratory alkalosis with hypokalemia. Treatment focused on fluid therapy, vitamin K therapy, and N-Acetyl Cysteine (NAC). She developed angioedema and urticaria with no airway compromise, in response to intravenous NAC. A diagnosis of acute liver injury secondary to YP poisoning was made. Close monitoring of liver function and coagulation parameters, and bleeding complications was done. Plasmapheresis was considered as NAC reinitiating was not feasible due to potential anaphylaxis. The patient responded well to the treatment and was discharged on day 7 of hospitalisation.