Notensyl

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Notensyl

Method of action: Analgesic, Antispasmodic

Treatment option:

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 Notensyl

What is Notensyl?

Notensyl is a pharmaceutical medication containing the active ingredient dicycloverine hydrochloride (also known as dicyclomine hydrochloride). It belongs to a class of drugs known as antispasmodics, specifically anticholinergics (antimuscarinics).

Mechanism of Action

The medication works by relaxing the smooth muscles found in the walls of the gastrointestinal tract. It achieves this through two primary mechanisms:

  • Anticholinergic action: It blocks the action of acetylcholine at muscarinic receptors, which reduces the involuntary contractions of the digestive muscles.
  • Direct spasmolytic effect: It exerts a direct relaxing effect on the smooth muscle itself.

By reducing these muscle contractions, the medication helps to relieve spasms and cramps in the digestive system.

Primary Uses

Notensyl is primarily utilized to manage functional bowel disorders and gastrointestinal motility issues. Its use is most common in the treatment of:

  • Irritable Bowel Syndrome (IBS): Helping to alleviate the abdominal pain and discomfort associated with bowel spasms.
  • Functional bowel disturbances: Addressing cramping and localized pain in the digestive tract where no structural abnormality is present.

Pharmacological Properties

Following oral administration, the medication is absorbed by the body and begins to act on the gastrointestinal smooth muscle. It is designed to target the site of the spasm to restore more normal rhythmic movement to the digestive system. Because its action is focused on smooth muscle relaxation, it is used specifically for symptoms related to hypermotility (overactive muscle movement) in the gut.

Regulatory References

  1. U.S. National Library of Medicine (NIH, MedlinePlus)

What side effects are possible with Notensyl?

Possible Side Effects and Safety Information

The adverse reactions documented for Notensyl (Dicycloverine/Dicyclomine) primarily reflect its classification as an anticholinergic agent, affecting multiple body systems. All documented effects and safety constraints are consistent with official government prescribing information.


Frequency Classification and Common Effects

Based on clinical trial data from regulatory authorities, the most frequent adverse reactions are categorized as:

  • Very Common (≥10%): Dizziness and Dry mouth are reported as the most frequent effects.
  • Common (1%–10%): This category includes Nausea, Somnolence (drowsiness), Asthenia (weakness), and Nervousness.

Other commonly reported effects include Blurred vision, Constipation, and Headache. These effects are generally associated with the drug's anticholinergic properties.


Systemic and Serious Safety Patterns

The effects are grouped by System-Organ Class, affecting the Nervous System (e.g., Sedation, Confusion) and the Gastrointestinal Tract (e.g., Constipation, Anorexia).

Serious adverse reactions documented in official labels include severe central nervous system symptoms such as Psychosis and Hallucinations, which usually resolve within 12 to 24 hours after discontinuing the drug. Heat prostration (fever/heat stroke due to decreased sweating) is also listed as a serious concern, especially in high temperatures.


Population-Specific Restrictions

Official labeling defines strict limitations for vulnerable populations:

  • Infants under 6 months are contraindicated due to the risk of serious, life-threatening respiratory symptoms, including apnea and asphyxia.
  • Nursing Mothers are also contraindicated as the drug is excreted in human milk.

Notensyl is also contraindicated for individuals with pre-existing conditions such as Glaucoma, Obstructive Uropathy, Myasthenia Gravis, and Severe Ulcerative Colitis.

Overdose and Emergency Response

Overdose and When to Seek Help

Notensyl (dicyclomine hydrochloride) is an anticholinergic medication, and an overdose can lead to an exaggerated form of its usual effects, known as the anticholinergic syndrome. Overdosage, which is officially classified as potentially life-threatening due to the risk of significant systemic compromise, requires immediate emergency medical care.

Symptoms of Overdose

Symptoms reported in regulatory documents following an overdose of dicyclomine include:

  • Central Nervous System (CNS) Effects: Headache, dizziness, and altered mental status such as confusion or agitation.
  • Peripheral Anticholinergic Effects: Dry mouth, difficulty in swallowing, markedly dilated pupils (mydriasis), and hot, dry skin due to reduced sweating.
  • Gastrointestinal Effects: Nausea.

Required Emergency Actions

If an overdose is suspected, seek emergency medical attention immediately. Do not wait for symptoms to worsen. Due to the rapid progression of effects in some cases, urgent professional treatment is essential.

Treatment provided by medical professionals is typically symptomatic and supportive. This may involve using specific methods to reduce drug absorption, such as gastric lavage or the administration of emetics, if indicated and performed shortly after ingestion. Continuous monitoring of vital signs and symptom management are the primary goals of care.

Therapeutic Uses of Notensyl

What Notensyl Treats: Main Uses and Benefits

Notensyl is commonly used to help with certain distressing symptoms associated with Irritable Bowel Syndrome (IBS). The core therapeutic function of the drug contributes to easing the overall symptom load, particularly symptoms related to increased neurological or muscular activity. It is applied across domains where additional symptomatic support is needed for the treatment of this condition.


The medication is generally used for managing symptoms that create noticeable physiological strain, which includes cramping and abdominal discomfort. It is considered relevant in contexts involving heightened systemic burden and during phases when symptoms become more noticeable. It assists with maintaining functional stability, providing supportive relief when symptoms interfere with routine activities.

“This medication is generally used to support the patient during difficult episodes by easing distress and contributing to improved comfort.”

This supportive relief may help patients cope more steadily with symptom fluctuations that interfere with daily comfort. The medication is commonly used to help with conditions characterized by periods of heightened symptoms, such as IBS.

Quick Fact: Relevant for Easing Abdominal Cramping

Eligibility and Restrictions for Use

Who Can and Cannot Use Notensyl?

Eligibility for Notensyl (Dicycloverine/Dicyclomine) is strictly defined by government regulatory documents, focusing on patient age, life phase, and specific comorbidities.

Absolute Contraindications

The medicine is contraindicated and must not be used by the following populations or patients with these conditions:

  • Infants less than 6 months of age.
  • Nursing mothers (breastfeeding women).
  • Patients with obstructive diseases of the gastrointestinal or urinary tracts (e.g., obstructive uropathy).
  • Patients with severe ulcerative colitis, glaucoma, reflux esophagitis, or Myasthenia gravis.
  • Patients with a known hypersensitivity to Dicyclomine.

Age-Related Eligibility and Restrictions

Notensyl is approved for use in adults (18 years of age and older). Use in the elderly (65 years and older) requires caution due to increased susceptibility to effects. Safety and effectiveness in pediatric patients (children and adolescents) have not been established by the FDA.

Conditional Use

The medicine must be used with caution in patients with significant hepatic or renal impairment, as well as those with certain pre-existing conditions, including coronary heart disease, tachyarrhythmia, and prostatic hypertrophy.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Notensyl (Dicycloverine) primarily interacts with other substances through pharmacodynamic mechanisms related to its anticholinergic properties and through pharmacokinetic mechanisms affecting gastrointestinal absorption, as detailed in official regulatory documents.

Pharmacodynamic Interactions

Co-administration with other Anticholinergic Agents (such as certain antihistamines, antipsychotic agents, or antiarrhythmic agents) may result in additive effects, potentially increasing anticholinergic actions. Official labeling documents specify that Notensyl may antagonize the effects of antiglaucoma agents, risking an increase in intraocular pressure, and may counteract medicines designed to increase gastrointestinal motility, such as metoclopramide.

Exposure-Modifying Interactions

Because Notensyl slows the movement of the gut, it can alter the absorption of co-administered oral drugs. A specific concern documented in prescribing information is the potential for increased serum concentration of slowly dissolving dosage forms of Digoxin. Separately, Antacids are noted to interfere with the oral absorption of Notensyl itself, suggesting the need for separated administration.

Substance Interactions

The co-use of Notensyl with Alcohol or other CNS depressants may result in additive Central Nervous System effects, such as increased drowsiness. Population-specific cautions note that patients with renal impairment may be at a greater risk of adverse reactions, which affects the risk profile of all co-administered substances.

Mechanism of Action

Antagonism of Cholinergic Neurotransmission

Notensyl's mechanism begins with its primary action as an anticholinergic agent, competitively blocking muscarinic receptors (M3) on the smooth muscle cells of the gastrointestinal tract. This targeted blockade interrupts the excitatory signals from the parasympathetic nervous system, which are the main biological drivers of gut contraction, resulting in inhibition of nerve signal transmission to the smooth muscle, reducing the potential for contraction.

Direct Modulation of Smooth Muscle Contractility

The second core mechanism is a musculotropic effect, where the molecule acts directly on the smooth muscle cells independently of receptor blockade. This direct action modulates the intracellular calcium signaling necessary for muscle contraction, resulting in a reduction in smooth muscle contractility through the modulation of calcium dynamics. This dual mechanism acts through two independent pathways to modulate excessive smooth muscle activity.

Consequence: Physiological Adjustment of Motility

The combined impact of neural inhibition and direct muscle relaxation results in a decrease in the frequency and intensity of muscular contractions. This dual approach modulates the contractile response of the smooth muscle tissue, leading to a physiological adjustment in smooth muscle tone.

Dosage and Administration Information

How to Use Notensyl — Administration Guidelines

This section describes the administration of Notensyl (Dicycloverine) as outlined in standard therapeutic protocols.

Feature Instruction
Route of administration The medicine is approved for Oral (PO) use and Intramuscular (IM) injection.
Dosing schedule (Adults) Oral Start: 20 mg four times daily. The dose may be increased to 40 mg four times daily after one week of initial therapy. IM Dose: 10 mg to 20 mg four times daily.
Timing in relation to meals Instructions are not explicitly provided as mandatory conditions for use.
Preparation requirements The parenteral solution must be visually inspected for particulate matter or discoloration prior to administration.
Age-group administration rules The medicine is contraindicated in infants less than 6 months of age and in nursing mothers. Use with caution in older adults.
Special procedural conditions The injection must be administered via the intramuscular route only. The syringe must be aspirated before injection to avoid entry into a blood vessel.

Instruction Classifications

Feature Classification
Administration method type Oral (Tablet, Capsule, Syrup) and Intramuscular (Injection).
Frequency pattern Four times daily (QID).
Use-context constraints Oral: Discontinue use if effectiveness is not established within a two-week trial period. IM: Use is restricted to 1 or 2 days, with a required transition to the oral form thereafter.

Connection to the overall use protocol: The use protocol establishes two distinct, time-constrained administration methods. The oral route is the primary method, initiated at 20 mg four times daily and potentially increased to a maximum of 40 mg four times daily only after the first week. The intramuscular injection is reserved strictly for short-term use, limited to one to two days before transitioning to oral tablets or capsules. The consistent frequency of four times daily structures the treatment schedule regardless of the chosen route.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Notensyl

Evidence for Use in Irritable Bowel Syndrome (IBS) Symptom Management

The research evidence for Notensyl’s (Dicycloverine) use in conditions associated with muscle spasms is built primarily upon a limited number of Randomized Controlled Trials (RCTs). This research focused on exploring short-term symptom patterns related to physical discomfort and was conducted during periods of increased symptom activity. These trials were typically designed to compare Notensyl with an inactive placebo over short time intervals.

Studies explored outcomes related to physical discomfort, specifically targeting episodes where symptoms become more noticeable, such as abdominal cramping and tenderness. Research monitored how symptoms evolved in the observed populations during the brief study periods. Findings from this body of evidence describe patterns observed in the studies and are included in broader reviews of the antispasmodic medicine landscape.


Study Design and Outcomes Examined

The studies explored the effects of Notensyl on specific patient-reported outcomes describing perceived discomfort. Researchers examined what changes occurred in symptom scores, specifically for key IBS symptoms like pain and abdominal tenderness, over defined time intervals. Studies also monitored a global assessment outcome, where patients and physicians reported an overall evaluation of the patient’s condition. This research has been described as relevant in trials assessing short-term or episodic symptom patterns of conditions characterized by fluctuating manifestations.

In systematic reviews, the certainty of evidence specifically for Dicycloverine is often graded as low to very low. This grading reflects that conclusions are drawn largely from a small selection of older primary studies.


Evidence Gaps and Areas of Uncertainty

A major limitation noted in the scientific literature is the age of the primary evidence; the core efficacy data relies on trials conducted several decades ago. Comparative evidence is lacking for how Notensyl was evaluated against many newer therapeutic agents now used for IBS symptom management.

Data for certain groups, such as older adults or those with specific combinations of other health issues, remain insufficient to draw broad conclusions. Furthermore, research exploring modern outcomes, such as quality of life or long-term functional stability, remains limited. The scientific record indicates that a fuller context for the medicine’s role in the current landscape is dependent on further research.

Key Studies & References

  1. Dicyclomine hydrochloride in the irritable bowel syndrome: a double-blind study
  2. Dicyclomine - Drug Information Portal

Frequently Asked Questions (FAQ)

Common questions about Notensyl (FAQ)


Q: Can Notensyl be taken alongside standard over-the-counter pain relievers?

Official guidance states that Notensyl can interact with a variety of other medicines, including certain nonprescription products. This is especially true for medicines that may have anticholinergic effects or interfere with absorption, such as antacids. Regulatory documents note the importance of reviewing all current medications, including nonprescription products, with a healthcare provider before starting treatment.


Q: Are there any specific foods or drinks that should be avoided with Notensyl?

Official documents describe a potential for increased drowsiness or other central nervous system effects when the medicine is used with alcohol. The official product label does not generally list specific mandatory food restrictions as conditions for use.


Q: How long can a person typically expect to take Notensyl?

Official prescribing information indicates that documented safety data is not available for doses at the maximum strength for periods longer than two weeks. The period of use is typically determined by the individual's response to the medicine and the period during which relief is needed.


Q: Is Notensyl considered a long-term treatment option?

Official safety data for this medicine, especially at the maximum dose, is typically limited to treatment periods up to two weeks. The regulatory data primarily supports its use for the short-term relief of specific symptoms, such as muscle spasms.


Q: Are there any common but minor side effects of Notensyl that usually go away?

Clinical trial data summarized in regulatory documents indicate that some patients may experience side effects when taking this medicine. These effects either disappeared or were tolerated by a percentage of patients during the clinical studies.


Q: Are there any known interactions between Notensyl and common household medications?

Official guidance explicitly states that antacids can interfere with the absorption of this drug when taken by mouth. The medicine is noted to interact with a broad class of medicines known as anticholinergic or CNS-depressant agents, which can be found in various common household products.


Q: What are the general guidelines for discontinuing Notensyl?

Regulatory documents describe that the medicine is discontinued if effectiveness is not achieved within a two-week trial period. Official prescribing information contains no general guidelines regarding the need to taper off the medicine after a period of successful use.


Q: Does Notensyl need to be taken at a specific time of day?

The official dose for adults is typically prescribed to be taken four times a day (QID). The consistent frequency throughout the day is the key element in the administration instructions. Instructions about taking the medicine with meals are not always noted as mandatory conditions for use.


Q: Is it true that Notensyl can cause strange dreams?

Official regulatory documents do not specifically list 'strange dreams' as an adverse reaction. However, the medicine is associated with documented effects on the Central Nervous System (CNS), including Psychosis, Hallucinations, and Confusion.


Q: How quickly does Notensyl usually start working for people?

Official documents state that the drug is absorbed rapidly after being taken by mouth. It typically reaches its highest concentration in the bloodstream within 60 to 90 minutes.


Q: What happens if I stop taking Notensyl suddenly?

Official prescribing information does not contain specific instructions regarding the sudden stopping of the medicine. The document only advises discontinuation if the medicine's effectiveness is not established within a two-week trial period.


Q: Does Notensyl interact with common supplements like vitamin D or magnesium?

Official guidance notes the importance of informing a healthcare provider about all prescription and nonprescription medications, as well as any vitamins, nutritional supplements, and herbal products being taken. Specific interactions for common supplements like vitamin D or magnesium are not typically listed in the main regulatory documents.


Q: Is Notensyl known to cause weight gain or weight loss?

Based on data from clinical studies, neither weight gain nor weight loss was typically reported as a common side effect of the medicine.


Q: If I miss a dose of Notensyl, what is the generally accepted advice?

Official administration guidelines describe continuing the normal dosing schedule if a dose is missed. The guidance also notes that taking two doses to compensate for the missed one is avoided.


Q: Does Notensyl affect a person's ability to drive or operate machinery?

Official regulatory documents describe that activities requiring mental alertness, such as operating a motor vehicle or heavy machinery, are avoided. This is because the medicine may be associated with effects such as drowsiness or blurred vision.


Q: What does the term 'contraindication' mean regarding Notensyl?

The term contraindication in official prescribing information refers to a condition or factor that makes the use of the medicine dangerous or inadvisable. A contraindication defines a condition for which the drug is not administered because the risk of harm is greater than any potential benefit.


Q: Is there a generic version of Notensyl available?

The active ingredient in Notensyl is Dicycloverine hydrochloride (also known as Dicyclomine). The name of the active ingredient is the name of the generic drug, and regulatory bodies have approved generic forms of the medicine, including oral solutions.


Q: What is the general duration of effect for a single dose of Notensyl?

Research indicates that the drug has a relatively short duration of effect. The mean half-life of plasma elimination was determined to be approximately 1.8 hours in one study, which supports the frequent dosing pattern.


Q: Does Notensyl have a risk of dependence or addiction?

Official US regulatory documents do not classify this medicine as a controlled substance. Furthermore, the prescribing information contains no explicit information about the drug’s potential for abuse or addiction.


Q: What should be done if an allergic reaction to Notensyl is suspected?

Official safety guidance describes the discontinuation of the drug if symptoms of a serious adverse reaction or overdose occur. In such cases, physician contact or emergency medical attention is noted in the regulatory documents.


Q: Are there common signs that Notensyl might not be working for a person?

Prescribing information describes that the drug is discontinued if efficacy is not achieved within a two-week trial period. The drug is intended to relieve abdominal cramping and muscle spasms, and a lack of improvement in these specific symptoms over this period may indicate the medicine is not providing the expected benefit.


Q: What is the purpose of the black box warning on Notensyl?

The highest safety warnings assigned by the FDA are called Boxed Warnings (formerly Black Box Warnings). The purpose of this warning is to draw the attention of consumers and clinicians to the major, potential severe risks associated with the medicine.


Q: Can Notensyl be crushed, chewed, or split?

Official labeling for certain oral dosage forms that contain Dicycloverine describes restrictions on crushing, chewing, or splitting the tablets or capsules. This suggests that the manipulation of the oral form may be restricted.

How should Notensyl be stored and disposed of?

How to Store and Dispose of Notensyl (Dicycloverine)

The storage and disposal instructions for Dicycloverine are mandated by regulatory labeling to ensure product stability and safety.

Official Storage Requirements

Dicycloverine must be stored at Controlled Room Temperature, which is generally between 20°C and 25°C (68°F and 77°F). It is required to keep the medicine in a tightly closed, light-resistant container and protect it from excessive heat and moisture. The oral solution form must also be protected from freezing. Always store this medication out of the sight and reach of children.

Disposal Instructions

To safely discard expired or unused Dicycloverine, do not dispose of it via wastewater or household trash. Instead, follow local regulations by utilizing a community medicine take-back program or consulting a pharmacist for guidance on proper disposal methods.

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

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