A patient is prescribed Flexeril (cyclobenzaprine) for muscle spasms. Which of the following is the most common side effect that the nurse should educate the patient about?
A.
Tinnitus
B.
Drowsiness
C.
Diarrhea
D.
Palpitations
The correct answer and Explanation is :
The correct answer is B. Drowsiness.
Explanation:
Cyclobenzaprine (brand name Flexeril) is a muscle relaxant commonly prescribed for muscle spasms. It works by acting on the central nervous system (CNS) to reduce muscle hyperactivity, helping relieve muscle stiffness and discomfort associated with conditions such as musculoskeletal injuries or spasms. Like many CNS depressants, cyclobenzaprine has a range of side effects, with drowsiness being the most common.
Drowsiness:
Cyclobenzaprine’s primary action is on the central nervous system, which makes drowsiness its most frequently reported side effect. This sedation effect occurs because the drug slows down brain activity and causes relaxation, which can lead to excessive tiredness. Patients often report feeling sleepy, fatigued, or lethargic while taking cyclobenzaprine, particularly in the initial stages of therapy. It is important to educate patients about this common side effect and advise them to avoid activities that require mental alertness, such as driving or operating heavy machinery, until they know how the medication affects them.
Why Other Options Are Incorrect:
- A. Tinnitus (ringing in the ears): Tinnitus is not commonly associated with cyclobenzaprine. While certain drugs can cause tinnitus (e.g., aspirin or other ototoxic medications), it is not a recognized side effect of cyclobenzaprine.
- C. Diarrhea: Diarrhea is not a common side effect of cyclobenzaprine. In fact, the drug is more likely to cause constipation as it can slow down the smooth muscle activity in the digestive tract.
- D. Palpitations: Although palpitations (rapid or irregular heartbeats) can occur with cyclobenzaprine, this is a less common side effect compared to drowsiness. Cyclobenzaprine has anticholinergic effects, which may affect the heart rate, but this happens less frequently.
In conclusion, drowsiness is the most common side effect of cyclobenzaprine, and patients should be informed to monitor this while taking the medication.