Compare Flexeril vs. Norflex

Head-to-head comparisons of medication uses, side effects, ratings, and more.



Relaxes your muscles. Flexeril (Cyclobenzaprine) is widely used to treat muscle spasms and is available as a generic, but it shouldn't be used long-term.Coming soon.
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Reviews & ratings
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Reviews for Flexeril (Cyclobenzaprine)
of people say Flexeril (Cyclobenzaprine) is worth it
say it works well
say it's a big hassle
1043 reviews

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Side effects
  • Indigestion 3%
  • Fatigue 1%
More Flexeril side effects »

We haven’t found good data for Norflex side effects.

FDA side effect reports for Norflex »
How it works
Flexeril (Cyclobenzaprine) is a muscle relaxer. It works in the brain to help calm down muscle spasms without interfering with normal muscle function.Coming soon.
Type of medication
Muscle relaxerPrescription only
Coming soon.
Available as
  • Pill
  • Extended release
  • Extended release
Used for (click to learn more)
  • Musculoskeletal pain
Risk factors for serious side effects
  • Taking monoamine oxidase inhibitors (MAOI) 14 days before starting
  • Taking other medications for your mood
  • Alcohol or drug use
  • Age over 65
  • Taking tramadol
Detailed Flexeril (Cyclobenzaprine) risks & warnings »
Coming soon.
Pregnancy category
BFDA pregnancy category (Probably safe)

Research studies with animals haven’t found a risk to unborn babies, but it hasn’t been properly studied in humans.

See the FDA package insert
CFDA pregnancy category (Weigh risks vs. benefits)

Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

See the FDA package insert
  • Don't drink alcohol while on this medication.
  • Taking Flexeril (Cyclobenzaprine) may make you feel dizzy or sleepy for the first few days, especially if you drink a lot of alcohol or take recreational drugs. Your body should adjust to this, however, avoid driving or other activities requiring concentration until you know how your body responds to the medication. Talk to your doctor or pharmacist if these symptoms bother you.
No specific alcohol-related info.
No specific food-related info.No specific food-related info.
Kidneys and liver
No specific kidneys and liver-related info.No specific kidneys and liver-related info.
No specific sex-related info.No specific sex-related info.
No specific sleep-related info.No specific sleep-related info.
No specific weight-related info.No specific weight-related info.
Upsides and benefits
  • Can relieve pain associated with muscle spasms.
  • Available as a generic medication.
  • Can be used by pregnant women.
Coming soon.
Downsides and risks
  • Can cause dizziness and sleepiness.
  • Not meant for long-term therapy.
  • Not recommended in elderly patients, people with glaucoma, or in people with recent heart issues (like rhythm problems, heart failure, or heart attack).
Coming soon.
Tips from our pharmacists for people taking the medication
  • Can cause dizziness, fatigue, and sleepiness.
  • Take the medication at the same time each day.
  • Not to be used for long-term treatment.
  • Don't drink alcohol while on this medication.
Coming soon.
Learn more
More about FlexerilSide effectsReviews & ratingsAlternativesFDA package insert
More about NorflexSide effectsReviews & ratingsFDA package insert