The maximum is 30 mg per day. The most common side effects of cyclobenzaprine include:. People taking medications that act on serotonin must avoid cyclobenzaprine, as it can increase the risk of developing serotonin syndrome , a potentially life-threatening condition. Metaxalone is a nonbenzodiazepine. Doctors prescribe metaxalone in combination with rest, physical therapy, and other nondrug treatment strategies for painful muscle conditions. The brand name of this drug is Skelaxin in the U. The recommended dosage for people over 12 years old is mg three to four times a day.
People cannot take it with drugs that affect the amount of serotonin in the body, due to the risk of serotonin syndrome. These drugs can help with conditions that cause spasms, such as cerebral palsy or multiple sclerosis MS , as well as spinal cord injuries.
Doctors may recommend oral or intrathecal forms of baclofen. The latter involves an injection of the drug into the spinal canal. The brand name of this medication is Lioresal in the U. Doctors typically recommend taking 5 mg tablets three times a day. The maximum oral dose is 80 mg per day. If a person requires an intrathecal injection, they receive a single dose of 50 micrograms mcg.
If there is a response to the treatment, the doctor will adjust the dosage. The most common side effects of baclofen include:. Dantrolene can help ease muscle spasticity. Brand names for this in the U.
For muscle spasticity, doctors may prescribe 25 mg of dantrolene daily for 7 days. The maximum daily dosage is mg. The side effects of IV dantrolene include breathing changes that occur due to weakness in the respiratory muscles and muscle weakness.
Tizanidine has both antispasmodic and antispastic effects. People take it to help manage spasticity from MS or spinal cord injuries. Doctors may prescribe capsules of 2, 4, or 6 mg. Or, they may prescribe tablets of 2 or 4 mg. People may take tizanidine every 6—8 hours as needed. An OTC muscle relaxer does not require a prescription, but it may carry similar risks as a prescription muscle relaxer.
Methocarbamol is an OTC nonbenzodiazepine, antispasmodic medication. A common brand name for it in the U. If the doctor prescribes mg tablets, they may recommend three tablets initially and two to maintain the effect. If they prescribe mg tablets, they may recommend two initially and one or two to maintain the effect. Overall, the guidelines advise taking 6 grams a day for the first 48—72 hours of treatment, though a doctor may recommend taking 8 grams in this period if the issue is severe.
Afterward, a doctor usually recommends lowering the dosage to about 4 grams a day. Some research suggests that certain components in cannabis may have muscle relaxant effects. Tetrahydrocannabinol THC , the compound responsible for the inhibiting psychoactive effects of cannabis, may have muscle relaxant properties, for example. Overall, however, there is very scarce evidence of this potential effect, possibly due to the widespread prohibition of the cultivation, supply, and possession of cannabis.
The legalization of cannabis across many jurisdictions will help researchers study its medical uses. In most cases it is given as a four-week trial to see if it helps with symptoms. In addition, diazepam may be used to relieve lower back pain, or neck pain in conditions such as whiplash. It is addictive so cannot be used for more than a week or two. Methocarbamol is also used for muscle spasm in people with low back pain.
Much of the pain in these conditions is due to muscle spasm. The cause of the spasm is different to the nervous system conditions above. These medicines are usually taken by mouth tablets, capsules or liquids. In general, your doctor will start off with a low dose and increase this gradually over a number of weeks. This is in order to help your body get used to these medicines. Injections into the back are always started in the hospital. Cannabis extract is a spray for the mouth.
It should be sprayed under the tongue or on to the inside of the cheek once or twice a day. Always change the area in your mouth where you spray, to prevent irritation of the mouth.
Like other muscle relaxants you will normally start off with a low dose. The number of sprays used is normally increased over a number of days.
As with most medicines, muscle relaxants have a number of possible side-effects. However, not everyone experiences them and they usually improve as your body adjusts to the new medicine. Most muscle relaxants cause muscle weakness as a side-effect. It is not possible in this leaflet to list all the possible side-effects for these medicines. However, see below for a list of the most common side-effects. For more detailed information, see the leaflet that comes with the medicine packet.
For a full list of people who should not take each type of muscle relaxant, refer to the specific leaflet for that medication. Muscle relaxants are sometimes used to treat other conditions - for example, diazepam is sometimes used to treat anxiety or difficulty with sleeping insomnia. It is given as a pre-medication often called a 'pre-med' before an operation, particularly during procedures that may cause anxiety or discomfort.
It can also be used to treat seizures. Rectal diazepam tubes may be prescribed for this, as they are useful if a quick effect is needed or if it is not possible to give the medicine by mouth. This way, your healthcare provider can determine if you are at risk for a complication. The same is true for other medications you may be taking.
Cyclobenzaprine is the active ingredient in Flexeril, a prescription drug that helps relieve muscle spasms. These muscle spasms or cramps can result from dehydration, muscle fatigue, electrolyte depletion, pinched nerves, and other conditions.
The biggest side effect of cyclobenzaprine is possible drowsiness or dizziness. Other side effects include dry mouth, constipation, nervousness, abdominal pain, and more. Although serious side effects are rare, they can include hallucinations or confusion, difficulty urinating, irregular heartbeat, fainting, seizures, and loss of coordination. Medical attention is recommended if these serious side effects occur.
Flexeril or cyclobenzaprine is available in immediate-release tablets of 5 or 10 mg as well as extended-release tablets in 15 or 30 mg. In most cases, it is taken three times daily for about two to three weeks. A healthcare provider will prescribe a specific dosage and schedule for your needs. Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life. Food and Drug Administration.
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