- Least Effective Exercises Slideshow
- Dehydration Tips Slideshow Pictures
- First Aid Sprains & Strains Slideshow Pictures
- Cyclobenzaprine vs. Norco: What's the Difference?
- What is Cyclobenzaprine? What is Norco?
- What are the side effects of cyclobenzaprine and Norco?
- What is the dosage of cyclobenzaprine vs. Norco?
- What drugs interact with cyclobenzaprine and Norco?
- Are cyclobenzaprine and Norco safe to use while pregnant or breastfeeding?
Cyclobenzaprine vs. Norco: What's the Difference?
- Cyclobenzaprine and Norco (hydrocodone acetaminophen) are used to treat pain.
- Cyclobenzaprine is mainly used with rest and physical therapy for short-term relief of muscle spasms associated with acute painful muscle and skeletal conditions.
- Norco is prescribed for moderate to moderately severe pain of various causes.
- Brand names for cyclobenzaprine include Flexeril, Amrix, and Fexmid.
- Cyclobenzaprine and Norco belong to different drug classes. Cyclobenzaprine is a muscle relaxant and Norco is a combination of a narcotic pain reliever and a cough suppressant, and a non-narcotic analgesic (pain reliever) and antipyretic (fever reducer).
- Side effects of cyclobenzaprine and Norco that are similar include dizziness, drowsiness, nausea, and constipation.
- Side effects of cyclobenzaprine that are different from Norco include dry mouth, fatigue, headaches, blurred vision, unpleasant taste, nervousness, confusion, acid reflux, and abdominal pain or discomfort.
- Side effects of Norco that are different from cyclobenzaprine include lightheadedness, sedation, vomiting, and difficulty urinating.
- Withdrawal symptoms may occur if you suddenly stop using Norco.
What is Cyclobenzaprine? What is Norco?
Cyclobenzaprine is a muscle relaxant used with rest and physical therapy for short-term relief up to two or three weeks only of muscle spasms associated with acute painful muscle and skeletal conditions. Cyclobenzaprine relieves muscle spasm when the spasm is due to problems in the muscle itself and not problems in the nerves controlling the muscles. Cyclobenzaprine seems to achieve its helpful effect through a complex mechanism within the nervous system, probably in the brainstem.
Norco (hydrocodone acetaminophen) is a combination of a narcotic pain-reliever and a cough suppressant, similar to codeine, and a non-narcotic analgesic (pain reliever) and antipyretic (fever reducer) prescribed for moderate to moderately severe pain. The hydrocodone in Norco blocks the receptors on nerve cells in the brain that give rise to the sensation of pain. The acetaminophen in Norco works by elevating the threshold to pain, that is, in order for pain to be felt, greater stimulation of the nerves responsible for the sensation of pain is necessary. It reduces fever through its action on the temperature-regulating center of the brain.
What are the side effects of cyclobenzaprine and Norco?
The most common side effects of cyclobenzaprine include:
Other reported side effects include:
- Blurred vision,
- Unpleasant taste
- Acid reflux
- Abdominal pain or discomfort
Possible serious side effects include:
Common side effects of hydrocodone/acetaminophen are:
- nausea, and
Other important side effects include:
- constipation, and
- spasm of the ureter, which can lead to difficulty in urinating.
Hydrocodone can impair thinking and the physical abilities required for driving or operating machinery. Hydrocodone can depress breathing, and should be used with caution in elderly, debilitated patients and in patients with serious lung disease.
Hydrocodone may be habit-forming. Mental and physical dependence can occur but are unlikely when used for short-term pain relief.
Latest Exercise & Fitness News
Daily Health News
What is the dosage of cyclobenzaprine vs. Norco?
The recommended dose of cyclobenzaprine dose is 5 or 10 mg three times daily using immediate release tablets or 15 or 30 mg once daily using extended release tablets.
The usual dose for adults is 1 to 2 tablets or capsules (hydrocodone 2.5 to 10 mg; acetaminophen 300 to 750 mg) every 4 to 6 hours or 15 mL of liquid every 4 to 6 hours as needed.
What drugs interact with cyclobenzaprine and Norco?
- Cyclobenzaprine is chemically related to the tricyclic class of antidepressants, for example, amitriptyline (Elavil, Endep), nortriptyline Pamelor). As such, it should not be taken with or within two weeks of any monoamine oxidase (MAO) inhibitor, for example, isocarboxazid (Marplan), phenelzine (Nardil), tranylcypromine (Parnate), and procarbazine (Matulane). High fever, convulsions, and even death can occur when these drugs are used together.
- Cyclobenzaprine interacts with other medications and drugs that slow the brain's processes, such as
Patients receiving other narcotics, antihistamines, antipsychotics, antianxiety agents, or other CNS depressants (including alcohol) concomitantly with NORCO may exhibit an additive CNS depression. When combined therapy is contemplated, the dose of one or both agents should be reduced.
Drug/Laboratory Test Interactions
Acetaminophen may produce false-positive test results for urinary 5-hydroxyindoleacetic acid.
Are cyclobenzaprine and Norco safe to use while pregnant or breastfeeding?
There are no adequate studies of cyclobenzaprine in pregnant women. However, studies in animals suggest no important effects on the fetus. Cyclobenzaprine therefore can be used in pregnancy if the physician feels that it is necessary.
It is not known whether cyclobenzaprine is secreted in milk. However, since it is related to the tricyclic antidepressants, some of which are excreted in breast milk, caution is advised in using this medication in women who are breastfeeding.
There are no adequate studies of hydrocodone and acetaminophen in pregnant women.
Hydrocodone/acetaminophen is excreted in breast milk, and, therefore should be used cautiously by nursing mothers.
Subscribe to MedicineNet's General Health Newsletter
Cyclobenzaprine (Flexeril) and Norco (hydrocodone acetaminophen) are used to treat pain. Cyclobenzaprine is mainly used with rest and physical therapy for short-term relief of muscle spasms associated with acute painful muscle and skeletal conditions. Norco is prescribed for moderate to moderately severe pain of various causes. Brand names for cyclobenzaprine include, Amrix, and Fexmid.
Multimedia: Slideshows, Images & Quizzes
Picture of Hamstring Muscle
The prominent tendons at the back of the knee. See a picture of Hamstring Muscle and learn more about the health topic....
Bodybuilding Pictures: Muscle-Building Workout and Diet for Men
Want bulging biceps and a bigger chest? Our experts demonstrate the right moves to help men build bigger muscles with just two...
Pictures of 10 Muscle-Building Exercises for Diabetes
Watch this slideshow on Diabetes and Exercise. If you have diabetes, see how strengthening your muscles with these 10 weight...
Muscle Cramps (Charley Horse) and Muscle Spasm Remedies
What causes muscle spasms and cramps (charley horse)? What is the differences between muscle spasms and cramps? Learn about...
Muscle Cramps: Foods That Help and Prevent Cramping
One way to prevent muscle cramps is to get enough of these nutrients: potassium, sodium, calcium, and magnesium. They’re called...
Related Disease Conditions
Second Source article from Government...
Muscle Pain (Myofascial Pain Syndrome)
Muscle cramps are involuntarily and forcibly contracted muscles that do not relax. Extremely common, any muscles that have...
Myofascial Pain Syndrome
Myofascial pain syndrome is muscle pain in the body's soft tissues due to injury or strain. Symptoms include muscle pain with...
Muscle spasms are involuntary muscle contractions that come on suddenly and are usually quite painful. Dehydration, doing...
Treatment & Diagnosis
- Macrophagic Myofasciitis
- Myositis Muscle (Pain and Inflammation) Serious Drug Interactions
- Progressive Muscle Relaxation
- Is There a Direct Relationship Between Sinusitis and Muscle Pain?
- What Causes Rectal Muscle Spasms?
- What's the Strongest Muscle in the Human Body?
- Can Diabetes Cause Muscle Pain?
- Muscle Cramp (Charley Horse) Treatment and Symptoms
- How Muscles Work & Respond to Resistance Training
Medications & Supplements
Prevention & Wellness
Pain and Injury Resources
Health Solutions From Our Sponsors
Health Solutions From Our Sponsors
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.