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Cancer Chemotherapy drug wastage in a tertiary care hospital in India-A three-month prospective and one-year retrospective study.

This study prospectively quantified wastage of cancer chemotherapeutic drugs in oncology unit to find the associated cost in three months. Retrospective analysis of drug usage for 12 months was also conducted to determine the expected drug loss in one year. The effect of vial sharing was evaluated under the assumption of sharing. A significant drug wastage of 19.72% (95% CI, 14.52%-24.93%) in three months and 17.14% [95% CI 14.69%-19.59%] in one year occurred in our oncology unit. Number of vials purchased (r = 0.362, p < 0.01), weight (r = -0.146, p < 0.01) and body surface area (r = -0.26, p < 0.01) correlated with the drug wasted. Vial sharing assumption showed a 9% (95% CI, 2.5%-15.5%) reduction in cost in one year.