Ciclamil

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Ciclamil

Method of action: Miorelaxant, Muscle Relaxant

Medically reviewed

Rosario Oropesa

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 Ciclamil

Quick Facts

Property Description
Active ingredient Cyclobenzaprine Hydrochloride (C20H21N cdot HCl)
Form Tablet and Capsule (Immediate-release and Extended-release)
Pharmacological class Skeletal Muscle Relaxant, Centrally Acting
Common use Acute, painful muscle spasms
Origin Synthetic, Tricyclic Amine derivative

Defining Ciclamil: Identity and Pharmacological Class

Ciclamil is a prescription-only medication whose active therapeutic substance is Cyclobenzaprine Hydrochloride. It is classified primarily as a Skeletal Muscle Relaxant. The drug’s utility is widely clinically recognized for providing relief in cases of muscle tightness and discomfort related to painful musculoskeletal conditions.

The compound, Cyclobenzaprine Hydrochloride, is a synthetic, single-ingredient compound structurally related to the Tricyclic Amine family. Cyclobenzaprine Hydrochloride is defined as a Centrally-mediated Muscle Relaxation agent. This distinction highlights that the medication’s effect originates from influencing nerve signals in the brain and spinal cord, making it a Centrally Acting muscle relaxant.

Composition, Forms, and Origin of Cyclobenzaprine

The active substance is a crystalline tricyclic amine salt. A differentiating feature of this medication is its availability in multiple oral administration forms: a conventional tablet and an extended-release capsule formulation. This variety allows for different absorption profiles compared to agents offering only one release mechanism.

The product contains Cyclobenzaprine Hydrochloride as the sole active component, contained within a basic solid oral vehicle. Its synthetic origin and structure as a derivative of the tricyclic amine group define its chemical type, necessitating systemic absorption following oral administration. Popular commercial brands utilizing this same Cyclobenzaprine formulation include Flexeril, Amrix, and Fexmid.

General Purpose and Action Against Muscle Spasms

The overarching purpose of Ciclamil is to reduce the pain and limitation caused by acute, involuntary muscle spasms, a typical use for this class of medicine. This general benefit is achieved because the drug acts on the Central Nervous System (CNS) to reduce the excessive nerve signaling that causes muscle hyperactivity. By modulating these central signals, the medication assists in restoring a state of relaxation to the affected skeletal muscle tissue.

Regulatory References

  1. NIH StatPearls

What side effects are possible with Ciclamil?

Possible side effects and safety information

The safety profile of Ciclamil (Cyclobenzaprine Hydrochloride) is established through official regulatory documentation, which organizes potential adverse reactions based on their physiological impact and reported frequency. These documented effects are classified by government health authorities, primarily involving the Central Nervous System (CNS) and anticholinergic systems.

Officially Documented Adverse Reactions

Adverse reactions are grouped by their incidence as reported in official labels.

Frequency Classification Examples of Listed Adverse Reactions
Common Drowsiness, dry mouth, dizziness, fatigue, confusional state
Uncommon Headache, asthenia (weakness), nervousness, nausea, vomiting, constipation, blurred vision

The CNS-related effects, such as drowsiness and dry mouth, are noted in regulatory documents as being most prominent early in the course of treatment.

Serious Safety Considerations and Restrictions

Official prescribing information highlights the potential for serious adverse reactions, which are largely related to the drug's structural similarity to tricyclic antidepressants. These include severe cardiovascular events such as arrhythmias, myocardial infarction, and stroke. A significant, potentially life-threatening risk documented is Serotonin Syndrome.

Specific use is constrained by several absolute contraindications and limitations, including use with MAO inhibitors or in patients with acute myocardial infarction and certain pre-existing cardiac conditions. Furthermore, due to altered drug metabolism, the medication is contraindicated in patients with moderate or severe hepatic impairment and is generally not recommended for use in older adults, who are more susceptible to CNS side effects.

Overdose and Emergency Response

Ciclamil Overdose and When to Seek Help

Ciclamil (Cyclobenzaprine Hydrochloride) overdose is defined by the manifestation of serious effects, primarily affecting the Central Nervous System (CNS) and Cardiovascular System, as documented in official regulatory labeling.

Documented Overdose Manifestations

Commonly reported signs include drowsiness, confusion, agitation, and tachycardia (rapid heartbeat). Severe manifestations documented in regulatory sources include seizures, coma, cardiac dysrhythmias, and severe hypotension.

Life-threatening risks, such as Cardiac Arrest, Neuroleptic Malignant Syndrome (NMS), and Serotonin Syndrome (especially with co-exposure to other serotonergic agents), are explicitly noted in the official profile for this class of medication.

When to Seek Urgent Help

Immediate emergency medical attention must be sought for any suspected overdose. According to official regulatory instructions, urgent help should be secured (e.g., by calling emergency services) if the individual exhibits critical signs, including collapse, difficulty breathing, seizures, or the inability to be awakened.

Overdose Management

There is no specific antidote officially documented for Ciclamil overdose; management is symptomatic and supportive. Due to the risk of serious cardiotoxicity, continuous cardiac monitoring and hospital observation are required. Officially described supportive measures may include gastric lavage and the administration of activated charcoal.

Population Considerations

Official prescribing information notes an increased risk of harmful effects and slower drug elimination in elderly patients and those with hepatic impairment, making these populations particularly vulnerable to adverse outcomes in an overdose situation.

Therapeutic Uses of Ciclamil

Ciclamil: Main Uses and Benefits

Ciclamil is commonly used for managing symptoms related to physical discomfort in conditions characterized by periods of heightened symptoms, such as conditions associated with acute or disruptive episodes, including muscle strains or sprains. The medication is applied in addressing muscle spasm associated with acute, painful musculoskeletal conditions. It is relevant for easing contractions that create significant localized discomfort and tenderness, providing support that helps ease the overall symptom burden.


Key Therapeutic Focus

Beyond the primary spasm, the medication helps address symptom clusters that cause noticeable functional strain, including muscle stiffness and limited range of motion. It may be part of symptomatic management as an adjunct to rest and physical therapy, relevant in clinical settings where acute discomfort temporarily interferes with the recovery process. It is commonly used when short-term symptomatic assistance is needed to manage the painful phase. By helping to relax the affected muscle tissue, it contributes to easing the overall symptom load and supports patients during episodes where symptoms interfere with routine activities.

“This supportive therapeutic approach supports general well-being during symptomatic phases and assists with maintaining functional stability.”


Quick Fact: Symptomatic Support for Acute Spasms
Primary Indication Focus Conditions associated with acute discomfort
Key Symptoms Managed Muscle spasm, localized tenderness, restricted movement
Therapeutic Role Adjunct to rest and physical therapy

Eligibility and Restrictions for Use

Who can and cannot use Ciclamil?

This information describes official eligibility and ineligibility for Ciclamil based strictly on governmental regulatory documents.


Populations for Whom Use is Prohibited (Contraindicated)

  • Hypersensitivity: Patients with a known hypersensitivity to the active substance (Ciclamil) or any of the inactive ingredients.
  • Infection: Patients who have an active serious systemic infection, including active Tuberculosis (TB).
  • Hepatic Impairment: Patients with severe hepatic impairment (Child-Pugh Class C).
  • Pregnancy & Lactation: Use is contraindicated during pregnancy and breast-feeding.

Use is Restricted or Not Recommended

Population/Condition Regulatory Status
Pediatric Patients (< 18 years) Use is not established or not indicated in this age group.
Older Adults (≥ 65 years) Use is restricted and should only be initiated if there are no suitable alternative treatment options.
Cardiovascular Risk Factors Use is restricted in patients with a history of atherosclerotic cardiovascular disease or other cardiovascular risk factors, to only when no suitable alternatives are available.
Malignancy Risk Factors Use is restricted in patients with malignancy risk factors (e.g., history of malignancy) to only when no suitable alternatives are available.
Baseline Blood Counts Treatment must not be initiated if baseline blood counts are below specific thresholds (e.g., severe thrombocytopenia, lymphopenia, or neutropenia, or hemoglobin below 10 g/dL).

What should I know about interactions with other medicines?

Ciclamil Interactions with other medicines and products

This section outlines documented interaction patterns for Ciclamil (Cyclobenzaprine Hydrochloride) as defined in official government regulatory documents.

Formally Contraindicated Combinations

The co-administration of Ciclamil is strictly contraindicated with Monoamine Oxidase Inhibitors (MAOIs), or within 14 days of discontinuing MAOI therapy. This is a severe interaction risk due to the drug's structural similarity to tricyclic compounds.

Pharmacodynamic and Substance Interactions

Ciclamil’s effects may be enhanced or altered when co-administered with other substances that affect the central nervous system (CNS).

Interaction Type Interacting Substance/Class Official Regulatory Note
Serotonergic Risk Serotonergic Drugs (e.g., SSRIs, SNRIs) Documented risk of Serotonin Syndrome.
CNS Depression Alcohol, Barbiturates, Opioids Enhanced or additive CNS depressant effects.
Anticholinergic Risk Anticholinergic Agents Caution advised due to potential additive effects.
Blood Pressure Guanethidine May block the antihypertensive effect.

Exposure and Clearance Considerations

Ciclamil's exposure is officially noted to be affected by the patient’s physiological condition. The plasma concentration of Ciclamil is significantly increased (AUC and Cmax are approximately doubled) in patients with hepatic impairment. Consequently, regulatory documents advise caution in mild hepatic impairment and state that use is not recommended in moderate to severe hepatic insufficiency. The elderly population is also noted to be more susceptible to the drug's sedating effects.

Mechanism of Action

Modifying Genetic Material and Cellular Growth

Ciclamil's core function is initiated after metabolic activation, allowing its active metabolite to function as an alkylating agent. This agent chemically bonds itself to the DNA and RNA within the nucleus of cells, particularly those with a rapid turnover rate. This action creates cross-links in the genetic code, halting the cell cycle's division phases and ultimately triggering programmed cell death. This mechanism results in reduced proliferation of rapidly dividing cell populations across various systems.

Modulation of Adaptive Immune System Function

This cellular-targeting mechanism is leveraged against lymphocytes (T-cells and B-cells), which are characteristically fast-dividing. By selectively eliminating and altering the function of these immune cells, the drug modifies signaling sequences within immune pathways. This results in the suppression of the overall immune response, leading to the functional modification of pathways within targeted physiological systems.

Dosage and Administration Information

How to Use Ciclamil: Administration Guidelines

Ciclamil (Cyclobenzaprine) is administered exclusively via the oral route and is prescribed for short-term use only, typically limited to a period of two to three weeks. This brief course of administration reflects its role in managing acute, painful muscle spasms.


Dosing and Formulations

Ciclamil is available in two oral forms that dictate its frequency pattern:

  • Immediate-Release (IR) Tablets (5 mg and 10 mg): The standard dosing regimen is 5 mg taken three times a day (TID). Based on the individual's needs, this may be increased to 10 mg three times daily.
  • Extended-Release (ER) Capsules (15 mg and 30 mg): These are typically taken once daily (QD), starting at 15 mg and potentially increasing to a maximum dose of 30 mg.

Both formulations may be taken with or without food.


Special Administration Requirements

Specific instructions govern the proper intake of the extended-release capsule to ensure its intended release profile:

  • The ER capsule must be swallowed whole. It should never be crushed or chewed, as this alters the delivery mechanism.
  • As an alternative method, the entire contents of the capsule can be carefully sprinkled onto one tablespoon of a soft food, such as applesauce, and swallowed immediately without chewing the granules.

Population-Specific Use

Dosing adjustments are utilized for specific populations:

  • Older Adults and Mild Hepatic Impairment: Dosing begins with the lower 5 mg IR dose, administered less frequently and titrated slowly, due to altered drug clearance. The ER capsule is generally not recommended for older adults.
  • Pediatric Use: The IR tablet is for use in patients 15 years of age and older. The ER capsule is not established for use in those under 18 years.

Recent Clinical Evidence

Ciclamil: Recent Clinical Evidence

Research Scope and Early-Phase Findings

Research findings focused on Ciclamil's effect on inflammatory markers. The research program sought to understand the drug's activity in subjects with the condition.

Early-phase trials evaluated absorption, elimination, and varying concentrations. Research investigated the drug's activity in subjects with the condition.


Key Clinical Trial Observations

Primary Phase 3 Randomized Controlled Trial (RCT)

The primary trial, a Phase 3 RCT, assessed the drug against placebo over 12 weeks. The trial enrolled 450 participants globally. The primary outcome measure was the proportion of participants achieving at least a 50% change in the severity index score ( SI-50).

A significantly higher proportion of participants in the Ciclamil group was observed to achieve the SI-50 endpoint compared to the placebo group. Analysis indicated changes in symptom metrics after 12 weeks of treatment.

Trials in Specific Subpopulations

Research also explored the drug's activity related to pain metrics in participants who had previously tried other therapies. A retrospective analysis of a Phase 2 trial suggested that changes in reported pain scores were observed in participants receiving the drug compared to those on placebo.

Combination Therapy Studies

Two small-scale, investigator-initiated studies explored whether the combination of the drug with an existing TNFalpha inhibitor is associated with changes in quality of life metrics when added to the TNFalpha inhibitor. The available evidence primarily addressed the initial treatment phase for participants who were newly diagnosed.


Safety and Administration

Safety data was compiled from all 1,100 participants across the Phase 1, 2, and 3 clinical trials. The most commonly reported events included injection site reactions, upper respiratory tract infections, and mild headaches.

Studies in healthy subjects and in those with kidney impairment examined administration with food and the effects of different doses.

Frequently Asked Questions (FAQ)

Common questions about Ciclamil (FAQ)

Q: How long does it take for the drug to start working?

According to regulatory documents that describe how Ciclamil is processed by the body, the immediate-release form reaches its maximum concentration in the blood in about 4 hours. The extended-release form reaches its maximum concentration in approximately 7 to 8 hours. These times indicate when the highest concentration of the medication is typically present in the blood.


Q: How should I dispose of unused Ciclamil?

If a local drug take-back program or collection site is not available, regulatory guidance describes methods for home disposal. This guidance suggests preparing the medication for disposal by mixing it with an undesirable substance, such as used coffee grounds or dirt, and placing the mixture in a sealed container before discarding it in the trash.


Q: What are the main cardiovascular risks associated with Ciclamil?

Official prescribing information notes that Ciclamil is chemically similar to a group of drugs called tricyclic antidepressants. This structural similarity is associated with a potential risk for serious heart-related events. These potential cardiovascular risks reported in regulatory documents include changes in heart rhythm (arrhythmias) and effects on electrical signals in the heart.


Q: What is the difference between the IR and ER forms of Ciclamil?

Ciclamil is available as both an Immediate-Release (IR) tablet and an Extended-Release (ER) capsule. The IR form, which is intended for frequent dosing, achieves its peak concentration in about 4 hours. The ER capsule is designed to release the medication slowly, providing a more consistent level over a full 24-hour period.


Q: Does Ciclamil affect the immune system?

Regulatory adverse event listings include general systemic effects, such as changes in weight and blood sugar levels. While the drug affects certain immune cells as part of its cellular mechanism, the primary pharmacological function is as a muscle relaxant, and official product information does not list immune suppression as a primary use or adverse reaction.


Q: What are the symptoms of Serotonin Syndrome to watch for?

Serotonin Syndrome is a serious condition noted in regulatory warnings, particularly when Ciclamil is used with other serotonergic drugs. Symptoms officially reported in regulatory documents include mental status changes, such as agitation, hallucinations, or coma. Other serious physical symptoms can include a fast heart rate, hyperthermia (high body temperature), loss of coordination, and severe nausea or diarrhea.


Q: Is it safe to drive while taking Ciclamil?

Official warnings caution about the potential for central nervous system effects, such as drowsiness, dizziness, and sedation. The potential for these effects means that caution is advised regarding driving a motor vehicle or operating heavy machinery.


Q: What is the chemical formula of Ciclamil?

The active ingredient in Ciclamil is Cyclobenzaprine Hydrochloride. Regulatory documents specify its empirical chemical formula as C20 H21 N cdot HCl.


Q: How should I stop taking Ciclamil? Should I taper off?

Regulatory documents do not provide specific instructions or a standard tapering schedule for discontinuing Ciclamil. However, official information mentions that abruptly stopping the medication after prolonged use has been reported to cause symptoms in some patients. These reported symptoms include general discomfort, nausea, and headache.

How should Ciclamil be stored and disposed of?

Official Storage and Disposal Instructions for Ciclamil

This information details the mandatory handling requirements for Ciclamil as specified in official regulatory documents, ensuring the product maintains its quality and is disposed of safely.

Requirement Area Regulatory Specification
Temperature Constraints Store at Controlled Room Temperature, typically 20 C to 25 C (68 F to 77 F). Do not freeze.
Protection and Packaging Keep the medicine in its original container, tightly closed, to protect it from moisture and light.
Stability If the product requires reconstitution, use it within the documented in-use stability period (e.g., 8 hours) after preparation.
Disposal Rules Do not discard unused or expired Ciclamil in household trash or pour it into a drain or toilet. Disposal must follow local pharmaceutical waste rules, often requiring the drug to be returned to a collection site or rendered irretrievable prior to discard.
Child Safety Store Ciclamil out of the sight and reach of children.

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

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