Big picture
Active substance: cyclobenzaprine. It is a centrally acting skeletal muscle relaxant most often prescribed for short courses to relieve acute muscle spasm associated with pain.
Common dosage presentations internationally include immediate release tablets of 5 mg and 10 mg and extended release forms at 15 mg and 30 mg. Where this page mentions 15 mg it refers to the extended release strength unless otherwise noted.
Therapy with cyclobenzaprine is typically combined with rest, targeted exercises or physiotherapy to help restore function after strains, sprains or other soft tissue injury. For important safety issues to take into account see the safety precautions and therapy is not indicated due to these conditions sections below.
How It Operates
Cyclobenzaprine reduces excessive muscle tone by modifying neural activity in the central nervous system. It does not directly relax muscle fibers but changes the reflex pathways that produce involuntary muscle tightness.
Dose Amount and Directions
Always take cyclobenzaprine exactly as prescribed by your clinician. Treatment is normally brief, often limited to two or three weeks while non-drug measures are also used.
- Take doses at regular intervals to maintain steady effect.
- Do not extend the prescribed course or raise the dose without consulting your prescriber.
- Extended release 15 mg tablets are usually taken once each day; immediate release tablets may be divided across the day.
If symptoms do not improve after the short course, arrange a follow up with your prescriber to determine whether continued therapy is warranted.
Harm prevention measures
- Tell your clinician if you have liver impairment, glaucoma, enlarged prostate, problems with urinary retention, or thyroid disease.
- Elderly patients are more likely to experience drowsiness, dizziness or confusion; lower doses or integrative medicine may be recommended.
- Limited safety data exist for the phase of pregnancy and lactation. Discuss risks and benefits with a healthcare professional if you are pregnant, planning pregnancy or breastfeeding.
- Cyclobenzaprine can cause sedation. Avoid driving, operating machinery or performing tasks that require alertness until you know how the medicine affects you.
- Be alert for signs of serotonin syndrome when cyclobenzaprine is combined with serotonergic drugs. Eye the temporary side effects area details to follow.
Inadvisable beacons
- Recent myocardial infarction, severe heart failure, significant arrhythmias or conduction abnormalities.
- Uncontrolled hyperthyroidism or other severe thyroid dysfunction.
- Concurrent use, or use within 14 days, of monoamine oxidase inhibitors (MAOIs) such as isocarboxazid, phenelzine, rasagiline, selegiline or tranylcypromine. Combining these agents can cause dangerous adverse reactions.
Possible harmful bodily effects
Obtain prompt medical assistance for your symptoms. any signs of an allergic reaction, for example hives, swelling of the face, lips, tongue or throat, or difficulty breathing.
If you develop chest pain, rapid or irregular heartbeat, sudden weakness or numbness, trouble speaking, or loss of coordination stop the medicine and get urgent assessment.
Serotonin syndrome is a potentially life threatening condition that may occur with cyclobenzaprine combined with other serotonergic medicines. Symptoms can include agitation, hallucinations, high temperature, sweating, tremor, muscle stiffness, a rapid pulse, and nausea or vomiting. Obtain emergency care if these signs appear.
More commonly reported, milder effects are drowsiness, fatigue, a dull headache, dizziness, dry mouth, nausea and constipation.
Drug Combinations and Communication and interpersonal dialogue and exchange
Cyclobenzaprine may enhance sedation from other central nervous system depressants. Review all medicines, including over the counter products, with your prescriber before starting this drug.
- Opioids, benzodiazepines, hypnotics and other muscle relaxants can increase drowsiness paired with the risk of respiratory depression.
- Combining with serotonergic agents such as SSRIs, SNRIs, tramadol, some antiemetics or certain Parkinson medicines increases the risk of serotonin syndrome.
- Anticholinergic medicines, including some antihistamines and drugs for overactive bladder, may worsen dry mouth, constipation and confusion.
- Specific social interacting as a shared activitys influence perceptions and decisions. have been reported with bupropion, meperidine and certain calcium channel blockers like verapamil.
- Avoid alcohol while taking cyclobenzaprine because it amplifies sedation and impairs coordination.
Omitted dose
If you miss a scheduled dose take it as soon as you remember unless it is nearly time for the next dose. Do not take two doses as a replacement for a i did not take my dose. Proceed back to your typical therapeutic dose schedule.
Overdosed
Signs of a fatal overdose may include profound drowsiness, vomiting, fast or irregular heartbeat, tremor, agitation or hallucinations. A drug a fatal overdose can endanger life. Contact emergency services or your local poison information centre without delay.
Long term a storage facility serves as a repository for goods awaiting use.
- Store every medicine beyond the reach and out of sight of children.
- Store in a tightly closed container at room temperature, ideally 15 to 30 C (59 to 86 F).
- Dispose of expired or unwanted tablets safely. Do not use after the expiry date.
Additional treatment options and Related Medications
Depending on clinical need and local availability, prescribers may recommend multiple options to cyclobenzaprine. Common options in Australia include:
- Baclofen (oral) - often used for spasticity and sometimes for acute muscle spasm; widely available and frequently PBS-listed.
- Tizanidine capsule - an alpha-2 agonist muscle relaxant; can cause sedation and low blood pressure in some patients.
- Diazepam - a benzodiazepine with muscle relaxant properties; usually limited to short-term use because of dependence risk.
- Orphenadrine - an anticholinergic antispasmodic with potential anticholinergic additional effects.
- Methocarbamol and metaxalone - centrally acting relaxants with variable availability in different countries.
Non-pharmacological approaches such as rest, heat or cold application, progressive exercise and physiotherapy are important and often reduce the need for medicines.
For a rough cost comparison, see here the prices and pricing information section and for access routes consult the lawful standing the document section.
The cost of goods in Australia labelled AUD
Costs vary by supplier, pack size and whether a medicine is subsidised under the Pharmaceutical Benefits Scheme (PBS). Figures below are indicative and for guidance only.
- Cyclobenzaprine (Flexeril): Not commonly marketed found in Australia. If imported privately or obtained via overseas prescription expect roughly AUD 0.80 to AUD 2.50 per 10-15 mg tablet before shipping and handling. Additional shipping or pharmacy fees may add about AUD 10 to AUD 25.
- Baclofen (generic): Readily available and often PBS-subsidised. Private price for 100 x tablet form of 10 mg may be approximately AUD 10 to AUD 25; PBS co-payment for general patients is typically around AUD 30 to AUD 32, and about AUD 7 to AUD 8 for concession holders.
- Diazepam (generic): Generally low cost; private packs may be AUD 5 to AUD 15. PBS co-payment rules apply where relevant.
- Tizanidine therapy option for spasticity: Private prices vary by pack and supplier, roughly AUD 15 to AUD 40 where sold; PBS coverage may not apply to all strengths.
Your actual out of pocket cost will depend on the pharmacy, location, whether you are covered by PBS or private insurance, and any importation fees. Ask your pharmacist for current prices before purchasing.
The legal position in Australia
Short summary: cyclobenzaprine is not widely marketed australia-based. When it is supplied it is treated as a prescription-only medicine and subject to Therapeutic Goods Administration (TGA) regulations.
- Prescription only (Schedule 4): If supplied, cyclobenzaprine requires a prescription and clinical oversight.
- Special Access Scheme (SAS): Prescribers can apply for patient-specific access to unapproved medicines under SAS Category B when clinically justified.
- Authorised Prescriber pathway: Clinicians may seek approval to prescribe certain unapproved medicines for defined patient groups.
- Personal importation: Individuals may import limited supplies (commonly up to three months) of prescription medicines for personal use if they have a valid prescription and comply with Customs and TGA rules. Proper documentation and packaging are essential; some products may be restricted.
Driving and workplace safety: Australian road laws and workplace rules prohibit performing safety-sensitive tasks while impaired. Sedating medicines such as cyclobenzaprine can affect driving or operating machinery.
PBS and insurance: Because cyclobenzaprine is generally not PBS-listed, government subsidy is unlikely. Patients should expect to pay privately or bear importation costs unless a specific subsidy or a backup route is available.
This page provides a general summary and not legal advice. For current regulatory requirements consult the TGA, your prescriber or pharmacist.
Quick Facts Primer
- Indication: short-term relief of acute skeletal muscle spasm with associated pain.
- Usual duration: treatment is typically limited to two to three weeks.
- Main cautions: sedation, anticholinergic effects such as dry mouth and constipation, and significant the quality of the act of interactions matters for trust. with MAOIs and serotonergic agents.
- For more on frequent the process of interactions boost coordination. and negative potential side effects see the the networked exchange of ideass span conversations, gestures, and feedback. of medicines and unwanted effects secondary sections.
- How to secure Diane 35 as a generic medication
- Is the generic version of Doxycycline therapeutically equivalent to the branded form?
- Micardis Generic Efficacy in Comparison to Brand-Name Counterparts
- Is Super Cialis approved by the FDA yet?
- Propranolol Explained for Non-Specialists