We have all sprained our necks and pulled a muscle in our backs at some point in our lives. Sometimes, while playing sports, lifting weights incorrectly, or even staying in the same position for too long, we can experience unimaginable muscle pain. When we see a doctor at such times, they may prescribe a muscle relaxant to reduce the pain and stiffness. One such medication is Chlorzoxazone. So today, let's learn exactly what this medicine is, what it does, and what precautions we need to take while using it.
What kind of medicine is Chlorzoxazone?
Simply put, Chlorzoxazone is a muscle relaxant . It helps reduce the pain and stiffness that occurs when our muscles are tense and contracted. It is usually used for sudden, short-term (acute) painful muscle conditions.
Imagine that your neck is so stiff and painful that you can't turn it to one side in the morning. At such a time, this medicine, along with rest and physical therapy, can help reduce the stiffness. It is more often used as a quick relief medicine than a long-term medicine.
Things you need to tell your doctor before taking medicine
It is very important that your doctor is fully aware of your health condition before prescribing Chlorzoxazone. Therefore, if any of the following apply to you, be sure to tell your doctor.
- If you drink alcohol frequently: This medicine may interact with alcohol to increase drowsiness and dizziness. It can also be harmful to the liver.
- If you have liver disease: This medicine is cleared from the body through the liver. Therefore, if you have any liver problems, your doctor should be aware of this.
- If you have allergies: Tell your doctor if you have any allergies to this Chlorzoxazone tablet, any other medicines, foods, dyes, or preservatives.
- If you are pregnant or trying to get pregnant: Take any medication during pregnancy with extreme caution, so inform your doctor about your condition.
- If you are a breastfeeding mother: There is not yet complete data on whether this medicine can pass into breast milk. Therefore, if you are a breastfeeding mother, you should definitely tell your baby about it.
How should I use the medicine?
The most important thing is to use the medicine exactly as prescribed by the doctor.
- Swallow this pill with a glass of water.
- If you experience stomach upset, take the medicine with or after a meal. Or you can take it before a meal.
- Take your medicine as prescribed by your doctor, at the prescribed intervals. Never take more than the prescribed dose or take it more frequently.
- If giving this medicine to children, it is important to talk to a pediatrician about it and seek advice.
Overdosage: If you think you have taken too much medicine, do not panic. Immediately call the National Poisons Information Centre at the Colombo National Hospital , or go to the Emergency Treatment Unit (ETU) of the nearest hospital.
What to do if you miss a dose of medication?
If you forget to take a dose, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and take your next dose at the scheduled time. Never take two doses at the same time to make up for a missed dose.
Other things that may interact with this medicine (Interactions)
Chlorzoxazone can interact with other medications you are taking, such as alcohol. This can increase side effects or change how well the medication works. Therefore, tell your doctor about all the medications you are taking (including vitamins and herbal remedies).
| Substance/drug type | What to pay special attention to |
|---|---|
| Alcohol | It can severely increase drowsiness, dizziness, and other side effects. It should be avoided completely. |
| Medicines that cause drowsiness | Allergy medications (antihistamines), anxiety or sleep medications, and some antidepressants - e.g. amitriptyline, fluoxetine, sertraline. |
| Painkillers | A morphine-type (narcotic) painkiller given for severe pain. |
| Anesthetics | General anesthetics used for surgery and local anesthetics used for numbness. |
| Medicines for epilepsy | Medications such as phenobarbital and primidone. |
Things to be careful about when taking medicine
- Drowsiness and dizziness: You may feel drowsy or dizzy after taking this medicine. Therefore, avoid activities that require alertness, such as driving, operating machinery, or working at heights, until you know how this medicine affects you.
- Changing positions: Don't go from standing to sitting suddenly. Especially if you're older, change positions slowly. Otherwise, you could get dizzy and fall.
- Alcohol: As we mentioned before, avoid drinking alcohol completely while taking this medication.
- Part of the treatment: Remember, this medication is only one part of the treatment. Along with this, you should also follow the rest, exercise, or physical therapy prescribed by your doctor.
Change in urine color: While taking this medication, your urine may turn orange or purple-red. This is normal and should not be alarming. This condition will go away after you stop taking the medication. This is not a side effect of the medication and is harmless.
Side effects that may occur due to medication
Like any medicine, Chlorzoxazone can cause side effects in some people. Let's break them down into serious and common ones.
| Serious side effects that should be reported to your doctor immediately | |
|---|---|
| Allergic reactions | Skin rash, itching, swelling of the face, lips or tongue. |
| Symptoms of liver injury | Dark yellow or brown urine, yellowing of the eyes or skin, pain in the upper right part of the stomach, nausea, loss of appetite, pale stools. |
| Difficulty breathing | Shortness of breath, rapid breathing. |
| Unusual bleeding or bruising | If the skin bruises or bleeds easily. |
| Severe weakness or vomiting | If you feel unimaginably tired or continue to vomit. |
| Side effects that are usually not serious, but should be reported to the doctor if they persist | |
| Dizziness, drowsiness | These can usually occur in the first few days. |
| Headache, nausea, stomach ache | These can be reduced by taking the medicine with food. |
Take-Home Message
- Chlorzoxazone is a medicine used for short-term, sudden muscle pain. Do not continue to use it without your doctor's advice.
- Before you start taking this medicine, tell your doctor about all your medical conditions and all other medications you are taking.
- Do not drink alcohol while taking this medicine for any reason.
- Since the medication can cause drowsiness, be very careful when performing tasks that require concentration, such as driving.
- Don't worry if your urine turns orange or purple-red, it's a normal, harmless condition.
- If you experience severe symptoms such as yellowing of the skin, difficulty breathing, or severe allergic reactions, see your doctor immediately.
- If you have any questions about this medicine, ask your doctor.
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