16th May 2025

A 43-year-old lady has been managed on theophylline for her asthma with no major adverse effects.

A 43-year-old lady has been managed on theophylline for her asthma with no major adverse effects. She was seen routinely in clinic and was found to be experiencing x. A theophylline level was taken and found to be 25mg/L; previous theophylline levels had been within range. She had a recent hospital admission for an NSTEMI and was started on new medications and advised to make some lifestyle changes. Which of the following may have precipitated these symptoms and a raised theophylline level?

Select the SINGLE most appropriate option from the list below. Select ONE option only.