You should not use this medication if you are allergic to chlorzoxazone.
Before taking chlorzoxazone, tell your doctor if you have liver disease. You may need a lower dose or special monitoring during therapy.
This medication may be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment.
It is not known whether chlorzoxazone passes into breast milk or if it could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.
Chlorzoxazone can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.
Avoid drinking alcohol. It can increase some of the side effects of chlorzoxazone.
Cold or allergy medicine, narcotic pain medicine, sleeping pills, muscle relaxers, and medicine for seizures, depression or anxiety can add to sleepiness caused by chlorzoxazone. Tell your doctor if you regularly use any of these medicines, or any other muscle relaxer.
Seek emergency medical attention if you think you have used too much of this medicine. An overdose of chlorzoxazone can be fatal.
Overdose symptoms may include nausea, vomiting, diarrhea, drowsiness, dizziness, headache, muscle weakness, shallow breathing, or fainting.
Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at your next regularly scheduled time. Do not take extra medicine to make up the missed dose.
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using chlorzoxazone and call your doctor at once if you have any of these serious side effects:
- nausea, stomach pain, low fever, loss of appetite, itching, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes);
- black, bloody, or tarry stools;
- coughing up blood or vomit that looks like coffee grounds; or
- feeling like you might pass out.
Less serious side effects may include:
- drowsiness, dizziness, tired feeling;
- slightly discolored urine; or
- mild skin rash or bruising.
This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.
There may be other drugs that can interact with chlorzoxazone. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.
Eze D.S., Paraflex, Parafon Forte DSC, Relaxazone, Remular, Remular-S, Strifon Fort, and chlorzoxazone
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