Final answer:
The patient may be experiencing hypokalemia, which is an abnormally decreased blood level of potassium. Hypokalemia can lead to muscle weakness and can affect various body systems.
Step-by-step explanation:
The patient may be experiencing hypokalemia, which is an abnormally decreased blood level of potassium. The weakness and abdominal pain can be symptoms of fluid volume deficit, which can cause electrolyte imbalances. Hypokalemia can lead to muscle weakness and can affect various body systems, including the cardiovascular and gastrointestinal systems.