14th February 2025

A 56-year-old woman books an emergency evening appointment with her GP after experiencing a racing pulse and dry mouth all day.

A 56-year-old woman books an emergency evening appointment with her GP after experiencing a racing pulse and dry mouth all day. She has a background of hyperthyroidism and thinks they are related. She also has an overactive bladder and hayfever. She has taken carbimazole, levothyroxine and oxybutynin for a number of years.

Obs are: HR 103 bpm, BP 134/70, RR 17, SpO2 99% on RA, temperature 36.6.

The GP is starting to discuss thyroid function tests when the patient admits that she got into a car crash on the way to work that morning.

Which of the following is the most likely differential diagnosis?

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