- By FYH News Team
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Introduction:
Deterioration in mental health has been reported in a minority of individuals with cystic fibrosis starting elexacafor/tezacaftor/ivacaftor (ELX/TEZ/IVA). We report our experience of using sweat chloride and markers of clinical stability to titrate dose reduction with the aim of minimising adverse events and maintaining clinical stability.
Method:
Adults (n = 266) prescribed ELX/TEZ/IVA, were included. Adverse events, sweat chloride, lung function and clinical data were collected.
Results:
Nineteen (7.1%) individuals reported anxiety, low mood, insomnia and “brain fog” with reduced attention and concentration span. Thirteen underwent dose reduction with sweat chloride remained normal (<30 mmol l-1) or borderline (30-60 mmol l-1) in six (46.2%) and seven (53.2%) cases respectively. Improvement or resolution of AEs occurring in 10 of the 13 cases.
Conclusion:
Dose adjustment of ELX/TEZ/IVA was associated with improvement in mental health AEs without significant clinical deterioration. Sweat chloride concentration may prove useful as a surrogate marker of CFTR function.
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