Chemotherapy Induced Nausea and Vomiting (CINV) Drugs are antiemetic therapies designed to prevent or reduce the debilitating nausea and vomiting triggered by cytotoxic cancer treatment, directly influencing patient adherence and quality of life. The Chemotherapy Induced Nausea and Vomiting (CINV) Drugs market size surpassed USD 5.2 billion in 2025, underpinned by rising global cancer prevalence, expanding use of highly emetogenic regimens, and growing physician emphasis on prophylactic rather than reactive management. With a projected CAGR of ~6.1% through 2033, the market forecast points to sustained industry expansion as next-generation NK1-RA combinations, long-acting depot formulations, and oral fixed-dose triple therapies gain share. Oncology societies tightening guideline compliance, payers tying reimbursement to outcome metrics, and biosimilar entrants eroding historical price premiums are reshaping competitive dynamics, while real-world evidence generation becomes pivotal for differentiation.