CINV can be classified into several types: - Acute: Occurs within the first 24 hours after chemotherapy. - Delayed: Begins more than 24 hours after chemotherapy and can last for several days. - Anticipatory: Occurs before chemotherapy starts, often triggered by previous experiences. - Breakthrough: Occurs despite prophylactic treatment. - Refractory: Occurs when CINV does not respond to standard treatments.
