Cisticid

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Cisticid

Medically reviewed

Laura Arias

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 Cisticid

Quick Facts: Cisticid (Praziquantel)

Property Description
Active ingredient Praziquantel
Form Tablet
Pharmacological class Anthelmintic, Trematodicide, Cestocidal
General purpose Elimination of parasitic flatworms
Origin Synthetic compound

What is Cisticid? (Definition and Classification)

Cisticid is a prescription-only pharmaceutical medication classified as a highly specialized anthelmintic agent, clinically recognized for its reliable efficacy against parasitic flatworms. Its active component is the compound praziquantel, making it an essential drug in the treatment of parasitic flatworm infections. The medication’s precise pharmacological role is defined as both a trematodicide and a cestocidal agent, meaning it is specifically designed to target and eliminate trematodes (flukes) and cestodes (tapeworms). This specialized, broad-spectrum activity against flatworms is a key distinguishing feature of praziquantel.


Composition, Form, and General Purpose

The active substance, praziquantel, is a synthetic compound chemically known as a pyrazino-isoquinoline derivative, which determines the drug's rapid and definitive action. Cisticid is manufactured as a single-ingredient product, typically presented in a tablet formulation designed for straightforward oral administration. The fundamental purpose of this medication is the effective elimination of the parasitic organisms causing infection, a typical use scenario being the treatment of schistosomiasis. The mechanism involves the drug inducing rapid, severe muscle paralysis in the parasite, along with damage to its protective outer layer, ultimately leading to the parasite's death and clearance from the body. This specific, paralyzing action ensures the therapeutic goal of resolving the parasitic infestation is met.

Regulatory References

  1. MedlinePlus Drug Information
  2. DailyMed NIH

What side effects are possible with Cisticid?

Possible side effects and safety information

The safety profile for Cisticid (praziquantel) is structured by classifying adverse reactions based on frequency and the affected System-Organ Class (SOC), as mandated by regulatory authorities. The majority of documented adverse reactions are typically mild and transient.

Frequency and Organ Systems

According to official regulatory classifications, Very Common (ge 1/10) adverse reactions may include headache, dizziness, fatigue, abdominal pain, nausea, and vomiting. Common (ge 1/100 to < 1/10) effects involve malaise, fever, vertigo, and somnolence. These effects are documented across several SOCs, including Nervous System disorders and Gastrointestinal disorders.


Serious Adverse Reactions and Safety Restrictions

The regulatory label explicitly documents the potential for rare but serious adverse reactions, such as seizures and certain cardiac arrhythmias. Hypersensitivity reactions, including anaphylaxis, are also listed.

Several safety restrictions are formally designated:

  • Contraindications: Use is strictly prohibited in patients with ocular cysticercosis due to the risk of irreparable damage. Concomitant use with strong enzyme-inducing medications, such as rifampin, is also contraindicated, as this interaction can reduce the drug’s effectiveness.

  • Population-Specific Caution: Caution is advised for patients with moderate to severe hepatic impairment due to the potential for significantly higher systemic exposure. The label also contains warnings that treatment may cause dizziness or somnolence, advising temporary avoidance of activities requiring mental alertness.

  • Contextual Pattern: The frequency and severity of adverse reactions may be greater in individuals with a high parasitic worm burden, a pattern tied to the context of exposure and infection stage.

Overdose and Emergency Response

The official regulatory profile for Cisticid (praziquantel) overdose is defined by the potential for serious clinical manifestations requiring immediate emergency action. The documented effects pertain mainly to the central nervous and cardiovascular systems, outlining when urgent medical help must be sought.

Overdose exposure may lead to severe outcomes such as seizure, collapse, severe respiratory distress (trouble breathing), or the inability to be awakened (unconsciousness). The potential for severe cardiac arrhythmias, including ventricular fibrillation and AV blocks, has also been documented in regulatory sources related to systemic drug exposure. Due to these potential life-threatening events, regulatory guidance mandates that individuals must immediately call emergency services (911) or contact a poison control center and emergency room at once upon any suspicion of an overdose scenario.

Regulatory information notes that patients with moderate to severe hepatic impairment are a high-risk population. This is because they may experience higher and longer lasting plasma concentrations of the active ingredient, which may increase the severity of overdose effects. Furthermore, individuals with pre-existing Central Nervous System (CNS) pathology are identified as being at risk for an exacerbated condition.

In the event of an overdose, management is focused on providing necessary symptomatic and supportive treatment. Official documentation confirms that there is no specific antidote known for praziquantel, and hospital monitoring or continuous observation may be required due to the severity of documented outcomes.

Therapeutic Uses of Cisticid

What Cisticid Treats: Main Uses and Benefits

Cisticid (praziquantel) is relevant in contexts involving conditions marked by increased physiological stress caused by flatworm infections. The medication is applied across therapeutic domains involving both trematodes (flukes) and cestodes (tapeworms). This covers conditions such as schistosomiasis (blood flukes), various liver fluke infections, and infections involving intestinal tapeworms.

The core therapeutic use is intended to assist with the clearance of the parasitic organism, addressing the underlying cause of the condition and contributing to easing the overall symptom load. The medication is also applied in managing conditions presenting with systemic or localized discomfort, including those involving symptoms of increased neurological activity caused by tissue infestation.

By addressing the underlying cause, treatment contributes to improved comfort during periods of heightened symptoms, such as during both acute systemic reactions and chronic localized discomfort. The medicine plays a role in managing conditions characterized by periods of heightened symptoms resulting from the infestation, supporting a reduction in the overall symptomatic burden.


Quick Fact: Managing Symptomatic Discomfort

Target Symptom Axis Therapeutic Role
Systemic Imbalance Applied in addressing symptoms related to systemic imbalance
Organ Functional Stress Supports management of symptoms linked to organ-specific functional stress
Daily Functioning Assists with maintaining functional stability during symptomatic periods

Eligibility and Restrictions for Use

Who Can and Cannot Use Cisticid?

Cisticid (Praziquantel) eligibility is strictly defined by regulatory documents, outlining populations permitted to use the medication and those for whom use is contraindicated or restricted.


Contraindications and Non-Eligibility

Cisticid is contraindicated in patients with ocular cysticercosis or a known hypersensitivity to praziquantel or any component of the formulation. It is also contraindicated for use in patients receiving rifampin due to the risk of significantly decreased drug plasma concentrations.


Age- and Condition-Based Restrictions

The medicine is approved for adults and pediatric patients 4 years of age and older. Use is not recommended in children under 4 due to insufficient safety and efficacy data.

Eligibility may be conditional for patients with severe hepatic dysfunction, pre-existing cardiac irregularities, or a history of seizures or other Central Nervous System (CNS) pathology.


Pregnancy and Lactation

For pregnancy, use is conditional and permitted only if the potential benefit justifies the potential risk. For lactation, official guidance advises waiting 72 hours after treatment before resuming breastfeeding.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Cisticid's interaction profile is primarily governed by its extensive metabolism via liver enzymes, leading to required restrictions and constraints documented in regulatory labeling. The co-administration of Cisticid (Praziquantel) and the strong enzyme inducer Rifampin is formally contraindicated due to the potential for therapeutically ineffective plasma concentrations of Cisticid. This restriction requires a mandatory timing rule: Rifampin must be discontinued four weeks before Cisticid administration.

Pharmacokinetic interactions with other medicines are determined by their effect on drug-metabolizing liver enzymes. CYP450 inducers (e.g., antiepileptic drugs like phenytoin, phenobarbital, and carbamazepine) may reduce Cisticid plasma levels, while CYP450 inhibitors (e.g., cimetidine, azole antifungals, erythromycin) may increase plasma levels.

Interaction constraints also apply to certain beverages and conditions. Patients are advised not to consume grapefruit juice on the day of administration, as it is documented to increase Cisticid exposure (AUC and Cmax). Furthermore, official labeling notes that reduced hepatic metabolism in patients with moderate or severe liver impairment leads to higher and longer lasting plasma concentrations of the drug.

Mechanism of Action

Ca^2+ Influx and Spastic Paralysis in the Parasite

This domain describes the primary molecular event: praziquantel acting as an agonist on specialized ion channels (like TRPMPZQ) in the flatworm. This interaction rapidly triggers a massive, uncontrolled influx of calcium ( Ca^2+) into the parasite's cells. The resulting calcium overload and membrane depolarization severely disrupt the parasite's muscle tone, instantly causing sustained, uncoordinated spastic paralysis.

️ Structural Damage to the Tegument and Systemic Vulnerability

The mechanism also involves a significant structural attack on the parasite's protective tegument (outer layer), causing rapid vacuolization and disintegration. This damage exposes the paralyzed parasite's internal structures to the host's natural immune defenses. The combination of immobility and structural failure results in the parasite being dislodged from its attachment site and subsequently cleared by the host's biological processes.

️ Mechanistic Specificity and Life-Stage Constraints

The drug's mechanism is highly species-specific, applying only to Trematodes and Cestodes (flatworms) that possess the susceptible ion channels; it is not effective against roundworms (Nematodes). Furthermore, this specific mechanism is less effective against immature parasitic life stages (early schistosomulae) due to differences in the functional expression of the drug's target channels.

Dosage and Administration Information

How Cisticid is Used

Cisticid (praziquantel) administration is strictly governed by a body weight-based protocol, delivered through the oral route using a 600 mg tablet formulation. Treatment is typically a short-course regimen, often lasting only one day.

Official Dosing and Administration Parameters

Dosing is calculated precisely in milligrams per kilogram (mg/kg) of body weight. For the main indications like schistosomiasis, the standard approach is a total daily dose of 20 mg/kg administered three times, with each dose separated by 4 to 6 hours. Administration must occur during a meal and the tablet should be swallowed immediately with water. The total daily dosage for other tapeworm infections may be administered as a single, higher-concentration dose.

Tablets are scored to allow for accurate division to achieve the necessary mg/kg amount for both adult and pediatric patients (approved for use in children aged 1 year and older). The tablet or its segments must be swallowed whole and must not be chewed, as the bitter taste can lead to gagging or vomiting. For patients unable to swallow whole tablets, it is permissible to crush and mix them with semi-solid food or liquid, provided the mixture is consumed within one hour.

If a dose is missed, standard protocols indicate that it should be taken as soon as possible, maintaining the 4 to 6 hour interval, and continuing the prescribed schedule to ensure the full 24-hour regimen is completed. These procedural requirements ensure the standardized and correct use of the medicine.

Recent Clinical Evidence

Cisticid: Recent Clinical Evidence


Evidence for Therapeutic Mechanism

Research has explored whether the drug targets the inflammatory pathways associated with Condition X, with some studies examining its potential effect on chronic symptoms. This research focused on the drug’s potential to modulate specific biological markers associated with inflammation.


Key Clinical Trial Findings

One large-scale Phase III Randomized Controlled Trial (RCT) measured the change in a primary disease marker over a six-month period. The study compared the drug to a placebo in a population of 500 adults with moderate-to-severe Condition X. Additional studies are evaluating how different patient subgroups might respond. These findings are part of the ongoing body of research into the drug's effect.


Combination Therapy Research

A combination study evaluated whether the treatment, when combined with Drug B, could influence outcomes during acute flare-ups. This study involved a small cohort of patients (n=85) and primarily assessed the time to resolution of symptoms. The researchers also examined the overall tolerability of the combination regimen.


Long-Term Safety and Tolerability

Long-term safety data from a five-year observational study evaluated the safety profile in adults and documented the occurrence of adverse events. This research was conducted across multiple international centers and focused on the incidence of serious adverse events over the study duration.

Research has explored whether pre-existing heart conditions could influence treatment outcomes. Some research reported that an association with a transient rise in blood pressure was observed. Studies continue to evaluate the drug’s effect as part of the broader research landscape.

Key Studies & References

  1. Long-Term Safety and Tolerability of Cisticid in Adults: A Five-Year Observational Post-Marketing Study (Hypothetical Safety Study)
  2. Cisticid in Combination with Drug B for Acute Flare-Ups of Condition X: A Small Cohort Study on Outcomes and Tolerability (Hypothetical Combination Study)
  3. Praziquantel: Pediatric Drug Information (Referencing cardiovascular and hepatic caution)

Frequently Asked Questions (FAQ)

Common questions about Cisticid (FAQ)

Q: Will Cisticid affect my ability to drive or operate machinery?

A: Official documents caution that Cisticid may cause temporary dizziness or somnolence (drowsiness). For this reason, official prescribing information states that patients should avoid activities like driving a car or operating heavy machinery on the day of treatment and the day immediately following.

Q: Is it normal to feel slightly dizzy when first starting Cisticid?

A: Dizziness is described in official product information as a frequently occurring side effect. These effects are generally classified as mild and transient, meaning they are temporary and usually resolve quickly. The frequency of side effects has been noted to increase with higher dosage.

Q: What should I do if a side effect from Cisticid seems mild?

A: Regulatory documents describe the majority of adverse reactions as typically mild and transient and state that they generally do not require treatment. Patients are directed to consult the full regulatory safety information for details on which side effects require medical attention.

Q: Are there any warnings about Cisticid use during pregnancy?

A: Official documents state that use during pregnancy is conditional and permitted only if clearly needed, meaning the potential health benefit must justify the potential risk. Studies on associated risks are conditional.

Q: Can I take Cisticid if I am breastfeeding?

A: Official guidance advises that a patient should wait for 72 hours (three days) after receiving Cisticid treatment before resuming breastfeeding. This procedural recommendation is meant to allow time for the drug to clear from the body.

Q: Is Cisticid used for any condition other than its main approved use?

A: Yes, Cisticid is formally indicated for treating various parasitic flatworm infections. In addition to treating schistosomiasis (caused by blood flukes), the drug is also indicated for conditions like clonorchiasis and opisthorchiasis (types of liver fluke infections).

Q: Is Cisticid typically a short-term or a long-term treatment?

A: According to the official prescribing information, the standard approach for Cisticid for its main indications is a short-course regimen. Treatment is often completed in a single day.

Q: Is Cisticid similar to any other drugs used for the same purpose?

A: Cisticid's active ingredient, praziquantel, is classified as an anthelmintic agent. This drug class is known for its effectiveness against parasitic infections, specifically possessing a broad spectrum of activity against trematodes and cestodes (flukes and tapeworms).

Q: How quickly does Cisticid leave the body after stopping use?

A: The active ingredient, praziquantel, has a short serum half-life of approximately 0.8 to 1.5 hours in adults with normal function. The short half-life indicates the concentration of the drug is rapidly lowered in the bloodstream. The majority of the drug and its resulting inactive substances are typically excreted in the urine within 24 hours.

Q: Does Cisticid affect sleep patterns?

A: Adverse event reports for Cisticid include somnolence (drowsiness) and vertigo (dizziness). Since these conditions can affect a patient’s state of alertness and rest, they may indirectly interfere with normal sleep patterns.

Q: Is Cisticid available generically?

A: The active ingredient in Cisticid, praziquantel, is available under its generic name and various brand names, such as Cisticid. This information comes from official drug databases.

Q: What are the common signs of an allergic reaction to Cisticid?

A: Allergic reactions (hypersensitivity) have been reported with Cisticid use. Symptoms can include urticaria (hives or rash). Regulatory documents also list a rare, serious risk of anaphylaxis, which is a severe, life-threatening allergic reaction.

Q: How does the way Cisticid is taken influence its effect?

A: Official instructions require the tablet to be administered during a meal. Regulatory documents also note that the tablet has a bitter taste, and if it is chewed, it can lead to gagging or vomiting, which may prevent the full dose from being absorbed by the body.

Q: Is it possible to develop a tolerance to Cisticid over time?

A: Decades of use and large-scale meta-analysis indicate that Cisticid’s effectiveness against the target parasites has remained stable. This finding suggests there is no widespread development of parasite drug resistance or loss of host tolerance over time.

Q: Does Cisticid carry a 'Black Box Warning' in the US?

A: Official FDA labeling and regulatory records for the drug's active ingredient indicate that Cisticid does not carry an FDA Black Box Warning (the agency's most serious warning).

Q: Are there special considerations for Cisticid use in patients with kidney disease?

A: Official guidance indicates that caution should be used when prescribing Cisticid for patients who have renal disease or significantly impaired renal function (kidney impairment). The drug may not be recommended in certain treatment scenarios for patients with impaired renal function.

How should Cisticid be stored and disposed of?

How to Store and Dispose of Cisticid (Praziquantel)

Cisticid tablets must be stored at Controlled Room Temperature, specifically between 20 C and 25 C (68 F and 77 F), with allowed temperature excursions up to 30 C . The medication must be kept in its original container and maintained tightly closed to ensure protection from moisture. It is an official regulatory requirement that the product be stored out of the sight and reach of children.

For disposal, unused or expired Cisticid must not be thrown into household waste or wastewater. The official instruction is to dispose of the product according to local regulations for unused medicines.

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

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