Cyclobenzaprine: Indications, How to Take, Dosing & Side Effects

Cyclobenzaprine hydrochloride is a muscle relaxant used to treat muscle pain caused by conditions such as fibromyalgia, torticollis (neck stiffness), or periarthritis. It works by blocking nerve impulses or pain signals that are sent to the brain, which helps reduce muscle contractions, spasms, and discomfort.

Cyclobenzaprine is available in 5 mg or 10 mg oral tablets, sold under brand names such as Flexeril, Amrix, and Fexmid, or as a generic labeled cyclobenzaprine hydrochloride.

This medication should only be used under medical supervision, by adults, and for a maximum treatment period of two to three weeks.

Indications for use

Cyclobenzaprine is prescribed to relieve muscle pain associated with musculoskeletal conditions such as:

• Torticollis (neck stiffness)

• Fibromyalgia

• Shoulder periarthritis

• Lower back pain

• Pain that starts in the neck and radiates to the arm

This medication should always be prescribed by a healthcare professional, who will evaluate each person’s condition individually.

Can cyclobenzaprine help you sleep?

Cyclobenzaprine may cause drowsiness as a side effect, but it is not indicated for sleep or for treating insomnia. People who have difficulty sleeping should consult a sleep medicine specialist to identify the underlying cause and begin appropriate treatment.

How to take cyclobenzaprine

The usual recommended dose of cyclobenzaprine hydrochloride is one 5 mg or 10 mg tablet, taken orally two to four times per day, as directed by a doctor. The maximum daily dose is 60 mg, and treatment should not last longer than three weeks.

Tablets should be swallowed whole with a glass of water, without breaking or chewing, and can be taken before or after meals. The medication typically starts to work about one hour after it is taken.

If a dose is missed, it should be taken as soon as remembered. However, if it is almost time for the next dose, skip the missed dose and continue with the regular schedule. Do not double the dose to make up for a missed one.

Possible side effects

The most common side effects that may occur while taking cyclobenzaprine include:

• Drowsiness

• Excessive tiredness

• Dizziness

• Dry mouth

• Headache

• Stomach pain

• Nausea

• Constipation

Another common side effect of cyclobenzaprine is drowsiness. Therefore, people taking the medication should use caution or avoid driving, operating heavy machinery, or performing potentially dangerous activities. Alcohol consumption should also be avoided, as it can increase drowsiness and dizziness.

Who should not use cyclobenzaprine

Cyclobenzaprine hydrochloride should not be used by:

• Children under 15 years old

• Pregnant or breastfeeding women

• People with glaucoma, urinary retention, hyperthyroidism, or heart problems such as heart attack, congestive heart failure, arrhythmias, or heart block

Cyclobenzaprine should also not be taken by people using antidepressants, anti-anxiety medications, or monoamine oxidase inhibitors (MAOIs) such as isocarboxazid, linezolid, phenelzine, or selegiline.

It is important to inform a doctor or pharmacist about all medications, supplements, or herbal products being used to avoid interactions that may increase the effects of cyclobenzaprine.