Flexeril (Cyclobenzaprine) – What It Is and When to Use It

Flexeril is the brand name for cyclobenzaprine, a prescription muscle relaxer. Doctors usually give it for short‑term relief of muscle spasms that follow injuries, surgeries, or back problems. It works by slowing nerve signals in the brain, which helps the muscles relax and reduces pain.

Most people take Flexeril for a few days up to two weeks. It isn’t meant for long‑term use because the body can get used to it and side effects may pop up. If you’re wondering whether Flexeril is right for you, talk to your doctor about the exact reason you need a muscle relaxer and any other medicines you’re on.

How to Take Flexeril: Dosage and Timing

The usual adult dose starts at 5 mg three times a day. If you tolerate it well, the doctor might raise it to 10 mg three times a day. Take each dose with food or a full glass of water to avoid stomach upset.

Don’t crush, break, or chew the tablets. Swallow them whole. If you miss a dose, take it as soon as you remember—unless it’s almost time for the next one. In that case, skip the missed dose and keep your regular schedule. Never double up.

Because Flexeril can make you drowsy, plan to take it when you don’t need to drive or operate heavy machinery. Many people feel the strongest drowsiness the first few days, then it eases off.

Common Side Effects and When to Call the Doctor

Typical side effects include dry mouth, drowsiness, dizziness, and a slightly blurry vision. These usually fade after a few days. If you notice a rapid heartbeat, severe dizziness, or trouble breathing, get medical help right away.

Less common but serious reactions can be “serotonin syndrome” if you’re also on antidepressants. Signs are a fast heartbeat, high fever, shaking, or confusion. Stop the medication and seek emergency care if these appear.

Talk to your doctor before combining Flexeril with alcohol, antihistamines, or other sedatives. Mixing can boost drowsiness and make it unsafe to do everyday tasks.

For seniors or people with liver problems, doctors often start at a lower dose because the drug stays in the body longer. Always follow the prescription exactly as written.

If you’re pregnant, nursing, or planning to become pregnant, let your doctor know. Flexeril isn’t usually recommended unless the benefits clearly outweigh the risks.

When you finish the prescription, you don’t need to taper off—just stop taking it. However, keep a record of how you felt while using it so you can share that info if you ever need another muscle relaxer.

In short, Flexeril can be a handy short‑term tool for muscle spasms, but it works best when you follow dosing rules, avoid alcohol, and watch for side effects. Always keep an open line with your healthcare provider to make sure the medication stays safe and effective for you.