Which of the following DOES NOT increase the susceptibility of a nerve fibre to conduction blockade by a local anaesthetic?

Which of the following DOES NOT increase the susceptibility of a nerve fibre to conduction blockade by a local anaesthetic?

A 37-year-old woman with a history of asthma is brought to the emergency department suffering from an attack. She takes no medications other than her inhaler for asthma. Her room air pulse oximetry is 86% and her lips are blue. Intravenous epinephrine and intranasal albuterol are given immediately. She becomes unresponsive a few minutes later then becomes pulseless and apneic. She expires despite resuscitative efforts. What is the most likely explanation for her demise?

A 60-year-old man presents to his primary care physician. During his interview, it is discovered that he is taking several outdated drugs for his medical condition. One of his medical conditions is hypertension, for which he takes a drug that prevents neurotransmitter uptake into vesicles. This prevents neurons from being able to concentrate and store certain neurotransmitters such as norepinephrine. Which of the following drugs is this?

A 28-year-old woman complains of fatigue that increases throughout the day. At the end of her workday, she says her eyes feel “heavy” and “droopy,” although she does not feel particularly tired. Pyridostigmine is prescribed to treat her myasthenia gravis. Which of the following is a potential side effect of this therapy?

A 27-year-old hospital worker has access to the pharmacy when no other workers are around. He is able to find morphine and inject himself with supratherapeutic dose of morphine. He then collapses and is found dead by coworkers 24 h later. What is the most likely explanation for his death?