A client who is suspected to have myasthenia gravis is given a small dose of postoperative medication. The client subsequently develops increased muscle weakness. Which medication should the nurse anticipate administering immediately?

Question

1. A dopamine agonist
2. A calcium channel blocker
3. A cholinesterase inhibitor
4. A sympathetic stimulant

Answer 1

Correct Answer: 3
Rationale 1: This would relax the peripheral muscles.
Rationale 2: This would relax cardiac contractility.
Rationale 3: This would increase muscle strength.
Rationale 4: A parasympathetic stimulant would be needed.
Global Rationale: A cholinesterase inhibitor would increase muscle strength. A dopamine agonist would relax peripheral muscles. A calcium channel blocker would relax cardiac contractility. A parasympathetic stimulant, not sympathetic stimulants, would be needed.