Zikan

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Zikan

Method of action: Miorelaxant

Treatment option: Zika Fever

Medically reviewed

Marina Burgos

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Zikan

Property Description
Active ingredient Chlorzoxazone
Form Tablet (Oral dosage form)
Pharmacological class Centrally Acting Skeletal Muscle Relaxant
Common purpose Relief from acute muscle spasm and associated pain
Origin Synthetic (Benzoxazole derivative)

What Type of Medicine is Zikan?

Zikan is a prescription-only medicinal product containing Chlorzoxazone, a substance that is clinically recognized and officially categorized as a Centrally Acting Skeletal Muscle Relaxant. This classification indicates that the drug achieves its effect by modulating nerve activity within the central nervous system, distinguishing it from peripheral treatments. Chlorzoxazone is a synthetic compound, specifically identified as a Benzoxazole derivative, with a chemical structure that has been the subject of pharmacological studies establishing its role in myorelaxation. Zikan is typically prepared as a single-ingredient, immediate-release oral dosage form, specifically a tablet, ensuring systemic absorption for body-wide muscle tone reduction.


Composition and General Purpose of Chlorzoxazone

The core function of the Chlorzoxazone component is to achieve skeletal muscle relaxation by interrupting the reflex nerve signals that sustain involuntary muscle contraction, or spasm. Chlorzoxazone's ability to modulate nerve pathways is essential for providing symptomatic relief in various musculoskeletal conditions, such as reducing the stiffness that follows an acute muscle strain. The medication, therefore, helps ease the discomfort and restriction of movement associated with muscle spasms. By disrupting the cycle of muscle hypertonicity, the medication’s general purpose is to assist the body in returning to a state of reduced tension, offering relief from the acute pain caused by the spasm itself. This mechanism provides essential relief in scenarios where muscle tension is the primary source of patient discomfort.

Regulatory References

  1. Chlorzoxazone LiverTox Review (NIH)

What side effects are possible with Zikan?

Possible Side Effects and Safety Information

The safety profile of Zikan (Chlorzoxazone) is defined by official regulatory documents, which classify adverse reactions according to the organ system affected and the frequency of occurrence. Effects that may be noted by an occasional patient primarily involve the Nervous System, including drowsiness, dizziness, lightheadedness, and general malaise, alongside general gastrointestinal disturbances.

Serious and Rare Adverse Reactions

The regulatory documentation highlights the risk of serious (including fatal) hepatocellular toxicity (liver damage) in rare instances. This event is described as idiosyncratic and unpredictable. Other reactions reported rarely include allergic-type skin rashes, petechiae, ecchymoses, and, in rare instances, gastrointestinal bleeding. Extremely rare occurrences of severe systemic reactions, such as angioneurotic edema and anaphylactic reactions, are also documented.

Population-Specific Safety Considerations

The official labeling notes that special caution is required for certain patient groups. Individuals with pre-existing hepatic impairment (liver disease) must use the medication with care, as this may increase the risk of serious side effects. Furthermore, the safe use of Chlorzoxazone regarding possible adverse effects upon fetal development has not been established; its use in women of childbearing potential is only advised when potential benefits are judged to outweigh possible risks. Older adults are also noted as a population requiring caution.

Safety-Related Restrictions

Zikan is contraindicated in patients with a known intolerance to the drug. The regulatory documents also specify a high-level safety consequence: the concomitant use of alcohol or other central nervous system depressants may result in an additive depressant effect. Additionally, the development of symptoms suggestive of liver dysfunction requires immediate discontinuation of the medicine.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory profile for Zikan (Chlorzoxazone) overdose describes a spectrum of clinical manifestations primarily affecting the central nervous system and muscle function. Documented overdose presentations often include severe drowsiness, sluggishness, headache, and gastrointestinal disturbances such as nausea, vomiting, and diarrhea. A key manifestation is marked loss of muscle tone, which may inhibit voluntary movement, alongside a decrease or absence of deep tendon reflexes.

Overdose may lead to critical life sign compromise, specifically respiratory depression (shallow, troubled, or irregular breathing) and hypotension (lowered blood pressure). Severe outcomes documented in regulatory texts include the potential for coma and respiratory arrest. It is noted that shock has not been observed following overdose, according to official labeling.

Immediate Medical Intervention Mandate

Regulatory guidance explicitly requires that individuals seek emergency medical attention immediately upon the suspicion of Zikan overdose. Immediate medical help must be sought by calling emergency services (911) if the person has collapsed, experienced a seizure, has trouble breathing, or cannot be awakened. Additionally, contact with the poison control helpline is mandated. No specific antidote is known; management involves supportive procedures such as gastric lavage or emesis, followed by administration of activated charcoal.

Therapeutic Uses of Zikan

Quick Facts about Zikan

  • Primary Use: Used to help manage moderate to severe plaque psoriasis.
  • Additional Use: Utilized for active psoriatic arthritis in adult patients.
  • Gastroenterology Use: May be prescribed to manage moderately to severely active Crohn's disease.

What Zikan Treats: Main Uses and Benefits

Zikan is a prescription therapeutic agent used by healthcare providers to help manage several chronic inflammatory conditions. Its primary role involves helping to manage the symptoms and progression of moderate to severe plaque psoriasis in patients who may be candidates for systemic therapy or phototherapy.

Additionally, Zikan is a treatment option used to address active psoriatic arthritis in adult patients. It may be used as a standalone treatment or in combination with other nonbiologic disease-modifying antirheumatic drugs (DMARDs) to help support improvements in joint symptoms and physical function.

In the field of gastroenterology, Zikan may be used to manage moderately to severely active Crohn’s disease in adult patients whose condition has shown an inadequate response to other treatments. The therapy aims to help induce and maintain clinical response. The specific therapeutic regimen and determination of the appropriate use of Zikan should be guided by a qualified healthcare professional.

Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Zikan — Official Regulatory Information

Eligibility Scope

Classification Population or Condition
Contraindicated Patients with known intolerance to Chlorzoxazone.
Adult Use Indicated Adult patients are the intended population for use.
Use Not Established Pediatric patients (safety and efficacy have not been established).
Conditional Use Women of childbearing potential (safe use in pregnancy has not been established; use is conditional on potential benefits outweighing risks).
Conditional Use Patients with preexisting liver disease or a history of allergic reactions to drugs (use with caution).
Not Recommended Geriatric patients (older adults) (Skeletal muscle relaxants are considered potentially inappropriate for this group, requiring extreme caution).
Immediate Discontinuation Patients who develop abnormal liver enzymes or symptoms suggestive of liver dysfunction (e.g., jaundice, dark urine).

Eligibility Classifications

  • Eligibility Severity: Contraindicated, Use Not Established, Conditional/Caution, and Immediate Discontinuation Mandate are classifications used in regulatory documentation.
  • Regulatory Basis: Eligibility is defined by official product labels (e.g., FDA DailyMed) and prescribing information.

The regulatory profile for Zikan defines eligibility primarily by mandating absolute exclusion for individuals with known intolerance to the drug and establishing that adults are the indicated population. Furthermore, the label requires the drug to be discontinued immediately upon signs of liver damage and restricts use in sensitive groups, as safety is not established for pediatric patients and pregnant women.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Zikan has the potential for drug-drug interactions that may alter its effectiveness or increase the risk of adverse effects. It is primarily metabolized by certain cytochrome P450 (CYP) enzymes in the liver, making it sensitive to co-administration with other medicines that affect these metabolic pathways.

Key Interacting Product Classes

Classification Potential Effect of Interaction
Strong CYP3A4 Inhibitors (e.g., ketoconazole, clarithromycin) May significantly increase Zikan levels in the blood, raising the risk of dose-related side effects.
Strong CYP3A4 Inducers (e.g., rifampin, phenytoin) May significantly decrease Zikan levels in the blood, reducing its therapeutic effectiveness.
CNS Depressants (e.g., benzodiazepines, opioids, alcohol) Concurrent use may potentiate sedative effects such as drowsiness and dizziness. Use should be avoided or monitored closely.

Additional Considerations

Co-administration with QT-prolonging medicines is generally advised against due to a potential additive risk to cardiac rhythm. Patients on multiple therapies or those with underlying health conditions should consult their healthcare provider for a comprehensive review of all prescription, over-the-counter, and herbal products, including St. John’s Wort, before starting Zikan. Dosage adjustments or a change to an alternative therapy may be necessary to safely manage clinically significant interactions.

Mechanism of Action

Targeted Inhibition of Viral DNA Synthesis

Zikan is activated by enzymes within the body, specifically in virus-infected cells, where it functions as an inhibitor of the Viral DNA Polymerase enzyme. By structurally mimicking a natural DNA building block, Zikan's active form is incorporated into the growing viral DNA chain. This incorporation immediately halts further synthesis (chain termination) because the drug lacks the necessary chemical structure for the next building block to attach.


Mechanistic Cascade Leading to Reduced Viral Load

This molecular action initiates a cascade by effectively suppressing the enzyme required for viral proliferation. The selective cessation of viral DNA synthesis prevents the virus from rapidly multiplying across the tissue. The resulting physiological consequence is a reduction in the rate of viral replication, which allows the body's natural processes to contain the infectious agent.

Dosage and Administration Information

How to Use Zikan (Chlorzoxazone)

The use of Zikan, which contains the active ingredient Chlorzoxazone, follows specific prescribing instructions. It is administered via the oral route as an immediate-release tablet for systemic use. This medicine is intended for short-term use and should only be continued for the necessary duration to address the acute condition. The administration pattern is typically based on multiple daily dosing to maintain continuous activity.


Administration Pattern

Usage Parameter General Guideline
Dose per Administration The single dose ranges from 250 mg to 750 mg, adjusted to patient response.
Maximum Daily Intake The total 24-hour dose should not exceed 3000 mg.
Frequency Administration is scheduled three to four times per day (TID or QID) at spaced intervals.
Food Relation The tablet may be taken with or without food, though co-administration with food is permissible.

Dosing Considerations

The use protocol specifies certain considerations for patient populations. Older adults are generally instructed to start Zikan treatment at the lowest end of the dosing range. Specific procedural caution and careful dosage titration are required when Zikan is administered to patients with hepatic impairment, as the liver is involved in its metabolism. If a dose is missed, standard instructions suggest taking it when remembered, unless it is close to the time for the next scheduled dose, in which case the missed dose should be skipped.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Zikan


Evidence for Use in Acute Muscle Spasm and Associated Pain

Research examining Zikan (Chlorzoxazone) has explored its use for acute, painful musculoskeletal conditions, such as muscle strains or temporary back pain, where muscle spasm is a factor. Studies monitored short-term experiences, using randomized controlled trials (RCTs) to compare the medicine against a placebo or against other treatments. Research explored whether changes occurred in patient-reported outcomes describing perceived discomfort, such as pain intensity measured by scales, and the severity of the muscle spasm itself.

Research highlights changes measured during the study period, typically over one to three weeks. Systematic reviews of this drug class examined whether changes in patient-reported outcomes occurred compared to placebo in some studies. However, when research specifically examined Chlorzoxazone, findings were mixed or inconsistent across some aggregated data sets.


How Zikan Was Studied in Clinical Trials

Zikan was evaluated in research exploring short-term symptom changes. These studies were mainly conducted in adult patients with acute issues that often resolve relatively quickly. The follow-up durations were limited, reflecting that Zikan was studied for conditions associated with acute or disruptive episodes, where use is typically defined by research as being for a brief period.


Long-Term Studies and Follow-up

Research focused on the study of Zikan and its core components involves studies monitoring patient experiences over defined time intervals that are quite short—typically two to three weeks. These follow-up durations were limited because the medicine was evaluated in research relevant in trials assessing short-term or episodic symptom patterns. As a result, long-term effects are not fully established. There is limited information for long-term outcomes, and few studies have explored the study of this medicine for chronic, ongoing conditions.


What is Still Uncertain About Zikan

Scientific reviews highlight several areas where certainty remains low or research is incomplete. One key limitation is that comparative evidence is lacking when trying to determine if Zikan holds consistent findings over other commonly researched centrally acting skeletal muscle relaxants. The efficacy findings were mixed across different studies, contributing to the overall sense of uncertainty regarding the precise context of Zikan within its therapeutic class. Furthermore, because follow-up durations were limited, questions remain about the long-term patterns of symptom control and recurrence.

Key Studies & References WHO ATC/DDD Classification on Muscle Relaxants, Centrally Acting

Frequently Asked Questions (FAQ)

Common questions about Zikan (FAQ)


Q: Does Zikan have any warnings about driving or operating machinery?

A: Official regulatory labeling includes warnings that Zikan may affect your mental and physical abilities. Due to potential central nervous system effects like drowsiness and dizziness, regulatory information indicates that activities requiring mental alertness, such as driving or operating heavy machinery, should be avoided until the effect of the medicine is known. This is standard guidance for drugs with sedative properties.

Q: Are there any reported long-term side effects associated with Zikan?

A: Research on Zikan has primarily investigated short-term use, and official regulatory information notes that the effects of long-term use are not fully established. Safety warnings primarily focus on the rare, acute risk of liver toxicity, which is listed as an idiosyncratic event.

Q: Is it normal to feel [non-emergency, common symptom] when starting Zikan?

A: Regulatory documents list certain effects, such as drowsiness, dizziness, lightheadedness, and mild gastrointestinal disturbances, as being reported by an occasional patient. These effects are described as potential adverse reactions when initiating the medicine. Official sources encourage the reporting of any new or bothersome effects.

Q: Are there any specific foods or supplements that should be avoided while using Zikan?

A: Official documents specifically warn against taking the medicine with the herbal supplement St. John’s Wort due to potential interactions. Otherwise, the tablet can be taken with or without food. However, it is recommended that individuals discuss all supplements with a health professional.

Q: Is it safe to use Zikan with herbal medicines or remedies?

A: Regulatory documents specifically list the herbal supplement St. John’s Wort as a potential interaction and generally advise caution with this class of products. Because Zikan is metabolized by the liver, official information indicates that all herbal products should be reviewed by a health provider.

Q: What common blood pressure or heart medications are known to interact with Zikan?

A: Official documents warn against combining Zikan with certain heart medications classified as QT-prolonging medicines. This combination carries a potential additive risk to cardiac rhythm and is generally advised against. The presence of existing heart conditions or medications necessitates review by a healthcare provider.

Q: Can people with pre-existing kidney or liver conditions use Zikan?

A: Caution and careful dosage titration are required for patients with pre-existing hepatic impairment (liver disease), and the medicine must be discontinued immediately if signs of liver dysfunction occur. The official labeling does not explicitly address kidney conditions as a specific contraindication or risk factor, and available documentation implies no specific restriction based solely on kidney condition.

Q: What other health conditions are listed as contraindications for Zikan?

A: The official labeling states that Zikan is absolutely contraindicated in patients with a known intolerance or hypersensitivity to the drug itself. No other specific health conditions are listed as contraindications in the current regulatory documents, apart from a known intolerance to the drug itself.

Q: What should a person know about discontinuation of Zikan?

A: Regulatory guidance specifies that Zikan is intended for short-term use and should be continued only for the necessary duration to treat the acute condition. Furthermore, regulatory guidance mandates immediate discontinuation of the medicine if symptoms or laboratory signs suggestive of liver damage occur due to the risk of serious side effects.

Q: What is the maximum duration of treatment with Zikan mentioned in official guidelines?

A: Regulatory guidance specifies that the drug is for short-term use for acute conditions, reflecting the brief follow-up periods of clinical studies. Official information emphasizes that use should be limited to the necessary duration, rather than mandating an absolute maximum number of days.

Q: Is Zikan a generic or brand-name drug?

A: Zikan is a brand name for the active ingredient Chlorzoxazone. Official product information confirms that Chlorzoxazone is the generic name and is also widely available in generic formulations.

Q: How quickly do the effects of Zikan typically start to appear?

A: Clinical pharmacology information indicates that the onset of action is usually relatively quick, typically within one hour of administration. The drug has a short half-life, which is consistent with a relatively short duration of activity.

Q: Is Zikan a controlled substance or a scheduled medication?

A: Official regulatory documents and drug scheduling lists specify that Zikan (Chlorzoxazone) is not a federally scheduled controlled substance in the United States. It is classified as prescription-only.

Q: How long does Zikan stay in a person's system after the last use?

A: The drug's presence in the body is described by its pharmacokinetic data. Official labeling indicates that the active ingredient has an elimination half-life of approximately 1.1 hours, meaning half of the dose is typically cleared from the plasma in that time.

Q: Can Zikan be safely crushed, split, or chewed?

A: Zikan is supplied as an immediate-release oral tablet. Regulatory instructions do not include guidelines for crushing, splitting, or chewing the tablet. Therefore, it is typically taken whole as specified in the prescribing information, unless modification is explicitly authorized.

Q: Is weight gain a known or common side effect of Zikan?

A: Official regulatory documents do not list weight gain or weight loss among the frequently reported or serious adverse reactions associated with the use of Zikan. Reported side effects mainly focus on central nervous system and gastrointestinal disturbances.

Q: Does Zikan interact with common over-the-counter pain relievers like ibuprofen or acetaminophen?

A: The drug interactions section does not specifically mention common over-the-counter pain relievers by name. However, regulatory guidance indicates that a health professional should review all prescription and over-the-counter products to safely manage potential interactions.

Q: Can Zikan be used safely by women who are breastfeeding?

A: The safety of using Zikan while breastfeeding has not been established in clinical studies. Official product information provides no data on whether the medicine is passed into human milk or what effects it might have on a nursing infant. The decision to use the medicine in this population involves a detailed benefit-risk assessment.

Q: What kind of routine medical monitoring may be required while taking Zikan?

A: Due to the potential for serious liver damage, regulatory guidelines emphasize the need for patients to be monitored for signs and symptoms of liver dysfunction. If symptoms occur, blood tests for liver enzymes are required for immediate action. The need for routine monitoring is a decision based on the specific clinical judgment of the prescribing physician.

Q: Does Zikan affect the results of any common laboratory blood tests?

A: Regulatory documents note that the drug can cause elevations in liver function tests (abnormal liver enzymes) in rare instances. Patients who experience symptoms of liver damage are monitored with blood tests. The medicine may also cause urine to change to an orange or purple-red color.

Q: Is Zikan known to cause any sexual side effects or loss of interest?

A: Official regulatory documents do not list sexual dysfunction or loss of interest among the commonly reported or serious adverse reactions associated with the use of Zikan. Side effect profiles primarily focus on effects related to the central nervous system and gastrointestinal tract.

Q: What happens if Zikan is taken with grapefruit or grapefruit juice?

A: Official labeling notes that Zikan is metabolized by certain CYP enzymes in the liver. Although grapefruit juice is not explicitly named, it is known to inhibit these enzymes, which could potentially lead to increased drug levels in the blood. For this reason, caution is indicated when Zikan is taken with known enzyme inhibitors.

Q: Does Zikan affect a person's mood or emotional state?

A: Regulatory documents list central nervous system effects such as drowsiness, dizziness, and general malaise (a general feeling of being unwell). Specific effects on a person's mood or emotional state are not generally listed among the commonly reported adverse reactions.

Q: What is the main reason Zikan requires a prescription?

A: Zikan is classified as a prescription-only medicinal product. This classification is primarily due to the need for a healthcare professional to assess the potential for serious, rare side effects, such as liver toxicity, and to ensure appropriate management of drug interactions.

Q: Does Zikan impact fertility in men or women?

A: Regulatory documents state that the effects of Zikan on human fertility have not been studied or established in clinical trials. As a result, the official documentation states that the effects of the medicine on human fertility have not been established.

Q: Is Zikan considered a medication with a high or low risk of drug dependence?

A: Zikan (Chlorzoxazone) is not scheduled as a controlled substance by federal regulatory bodies. Official labeling contains no specific warnings regarding a risk of physical dependence or abuse.

Q: Can Zikan cause a headache or migraine?

A: Official regulatory documents do not list headache or migraine among the commonly reported or serious adverse reactions associated with the use of Zikan. The nervous system effects primarily reported are dizziness, drowsiness, and lightheadedness.

Q: What is the difference between an allergic reaction and a serious side effect from Zikan?

A: Official regulatory documents list several types of serious safety concerns. Allergic-type reactions, such as skin rashes or anaphylaxis, are listed separately from other serious effects like idiosyncratic hepatocellular toxicity (liver damage). These represent different mechanisms of serious adverse events.

Q: What specific allergies prevent a person from using Zikan?

A: Zikan is absolutely contraindicated in patients with a known intolerance or hypersensitivity to the drug itself. The official label does not typically name specific non-active components, but any prior allergic reaction to the drug means its use is contraindicated.

Q: Can Zikan be used by people with diabetes?

A: Regulatory documents do not list diabetes as a contraindication or a specific cautionary condition that prevents the use of Zikan. However, caution is advised for any patient with underlying health conditions, and overall health status necessitates review by a prescribing physician.

Q: Does Zikan interact with any vitamins or mineral supplements?

A: The official label specifies certain enzyme inhibitors and inducers that interact with the drug. Regulatory guidance indicates that a health professional should review the safety of combining Zikan with all supplements, as general vitamins or mineral supplements are not named as specific documented interactions.

How should Zikan be stored and disposed of?

Storage and Disposal Requirements for Zikan

Zikan (Chlorzoxazone tablets) must be stored and disposed of according to specific regulatory requirements to maintain product integrity.

Storage Conditions

Requirement Specification
Temperature Store at 20 C to 25 C (68 F to 77 F) (Controlled Room Temperature).
Protection Keep tightly closed in the original container, away from excess heat, moisture, and direct light.
Prohibited The product must be kept from freezing.
Child Safety Must be kept out of the sight and reach of children.

Disposal Instructions

Unused or expired Zikan should not be flushed down the toilet. The preferred method for disposal is utilizing a medicine take-back program. If a take-back program is unavailable, follow governmental guidance by mixing the medication with an undesirable substance and placing it in a sealed container for household trash disposal.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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