The National Committee for Health Technology Incorporation (CONITEC) evaluates health technologies to recommend their inclusion or exclusion within the Brazilian Public Health System (SUS), and uses the budget impact assessment to estimate costs to the system. The Ministry of Health (MS) guideline recommends treatment of phenylketonuria (PKU) with restricted phenylalanine diet and phenylalanine-free amino acid formula (PFAAf) supplementation. CONITEC evaluated the inclusion of sapropterin dihydrochloride for PKU in the SUS.

The population eligible for treatment was evaluated by the number of patients receiving PFAAf between 2014 and 2017 registered in the SUS. Patients were stratified by age/weight and a simple linear regression was performed to estimate the future population. The costs of treatment and testing the responsiveness of sapropterin dihydrochloride were estimated according to the recommended dosage guideline of the MS, leaflet and public purchasing prices. A univariate deterministic sensitivity analysis was performed to evaluate different prices, responsiveness test methods and variations in the reduction of formula use.

The incorporation of sapropterin dihydrochloride would generate an incremental budget impact in the SUS of around BRL 79 million (USD 21.7 million) in 2019 and BRL 300 million (USD 82.1 million) in five years (2019-2023). The univariate sensitivity analysis estimated that the incremental budget impact could be between BRL 66 and BRL 103 million (USD 18 and USD 28 million) in the first year and between BRL 251 and BRL 388 million (USD 69 and USD 106 million) in five years. Sensitivity analysis showed that the price of sapropterin dihydrochloride was the most sensitive variable in the model.

The incorporation of sapropterin dihydrochloride in the SUS represents a significant budgetary impact and covers a small number of patients. Sapropterin dihydrochloride was recommended by CONITEC for the treatment of women with PKU, with a positive drug responsiveness test, and who are in the preconception period or in the gestational period.