6th February 2024

A 58-year-old male had his medication altered six months ago after his hospital visit and noticed an increased pins-and-needles sensation along his fingers and toes.

A 58-year-old male had his medication altered six months ago after his hospital visit and noticed an increased pins-and-needles sensation along his fingers and toes. Examination reveals reduced fine touch, vibration and proprioception. Temperature and pain sensation are maintained. Power was normal throughout. He was found to have a glossy red tongue with red, cracked sores at the corners of his mouth. Red, flaky, itchy skin areas were noted along his axillae, face and chest. HbA1c levels were normal. A vitamin deficiency is suspected.

Which of the following medications could have caused the following?