Final answer:
The nurse should plan to administer atropine to the client.
Step-by-step explanation:
In this scenario, the nurse is caring for a client who has myasthenia gravis and is experiencing a cholinergic crisis. A cholinergic crisis occurs when there is an excessive amount of acetylcholine in the body, leading to severe muscle weakness and respiratory distress. The nurse should plan to administer atropine to the client.
Atropine is a medication that acts as an antagonist to muscarinic acetylcholine receptors. By blocking the effects of excessive acetylcholine, atropine helps to relieve the symptoms of a cholinergic crisis.