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Lorzone (Chlorzoxazone)

Prescription requiredOnly Available By Prescription
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Top Generic choice

What is Generic?

What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.


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Lorzone is a muscle spasm treatment medication available by prescription and used to stop involuntary muscle spasming and pain that comes from having muscles contracting involuntarily that way. Chlorzoxazone is a muscle relaxer drug and works by messaging with the central nervous system and making it remove the stimuli that is causing the muscles to become tense and spasm. In rarer instances Lorzone may also be prescribed for treatment of bone conditions, but it is almost always used to reduce muscle spasm when people experience them frequently. Buy Lorzone from Canada and Canpharm and get the lowest Lorzone cost for it.

What is Muscle Spasm?

A muscle spasm is when muscles contract and tighten painfully and the person does not have any voluntary control over it. Muscle spasms are most commonly experienced in the thighs, calves, feet, hands, arms, and abdomen. Spastic muscles may feel harder to touch or appear visibly distorted, and spasms can occur for any number of reasons, from restrictions in blood supply to fatigue or electrolyte depletion to involuntary nerve discharges. The use of medication for muscle spasm treatment is best when it is paired with stretching and massage for affected muscles in the body.

Fact Table
Formula C7H4ClNO2
License FDA approved
Bioavailability Not well documented
Legal status Prescription only (US: Schedule IV)
Chemical Name Chlorzoxazone
Elimination half-life 1.1 hours
Dosage (Strength) Tablets; commonly available in 375 mg and 750 mg
Pregnancy advice Category C (US); Not recommended
Brands Lorzone, Parafon Forte, Remular-S among others
Protein binding Approximately 25%
PubChem CID 2732
MedlinePlus a682514
ChEBI 3655
ATC code M03BB03
DrugBank DB00356
KEGG D00771
Routes of administration Oral

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The standard dosage for Lorzone is to take medication 3 to 4x a day, with dosage strength based on your condition and indicated in your prescription. Always take your medication exactly as shown in your prescription and do not exceed dosage regulations.


The active ingredient in Lorzone is Chlorzoxazone.


Let your doctor know of any history of liver disease or major allergies before starting on Lorzone

Use of this medication may make you dizzy or drowsy

Limit alcohol consumption while using this medication

Be aware of medication expiry date


Negative drug interactions may occur between Lorzone and other Rx medications, including Adderall, amitriptyline, lorazepam, baclofen, clonazepam, cyclobenzaprine, duloxetine, cyclobenzaprine, gabapentin, clonazepam, pregabalin, meloxicam, metformin, naproxen, hydrocodone, omeprazole, oxycodone, prednisone, levothyroxine, tizanidine, topiramate, tramadol, trazodone, alprazolam, and cetirizine.

Let your doctor know of all medications you are currently taking before getting a prescription and proceeding to buy Lorzone generic online.

Side Effects

Lorzone side effects may occur, and some users may experience drowsiness, dizziness, lightheadedness, fatigue, stomach upset, or headache. If side effects are experienced it may be best to stop use and meet with a doctor again to discuss muscle spasm treatment medication alternatives.

Remember, these are not exhaustive lists, and it's important to consult with a healthcare professional for personalized advice and guidance. If you prefer, you may contact the U.S. Food and Drug Administration (FDA) directly. Visit or call 1-800-FDA-1088

Frequently Asked Questions about Lorzone

Does Lorzone make you sleepy?

Yes, drowsiness is one of the potential side effects from using this medication.

How long does Lorzone stay in your system?

This can vary based on a person’s physiology, but for most people Lorzone will stay in their system for approximately 8 hours.

Is Lorzone a controlled substance?

No, this is an Rx medication but it is not currently classified as a controlled substance.

Can Lorzone get you high?

No, this medication is used to relieve muscle spasms and it will not have any narcotic effect on a person.

Is Lorzone addictive?

This medication is not known to cause dependency, but it is important to always take this medication at the dosage / frequency indicated in your prescription. The risk of dependency increases when users do not adhere to these guidelines, and that can be true for many different types of Rx medications.

IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.