Periset-MD

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Periset-MD

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 Periset-MD

Property Description
Active ingredient Ondansetron (as a single compound)
Form Orally Disintegrating Tablet (ODT)
Pharmacological class Selective Serotonin (5-HT3) Receptor Antagonist
Common purpose Mitigation of nausea and vomiting
Origin Synthetic compound

What is Periset-MD and What Type of Medicine Is It?

Periset-MD is a prescription medicine containing the synthetic compound Ondansetron, the active ingredient which acts to mitigate symptoms of nausea and vomiting. It is primarily classified as an antiemetic, a type of drug designed to suppress these reflexes. Ondansetron is a selective serotonin 5-HT3 receptor antagonist. This specific classification indicates a highly targeted pharmacological action, focusing solely on blocking the key receptors involved in the vomiting reflex.

Understanding the Composition and Orally Disintegrating Tablet (ODT) Form

The core composition of Periset-MD is the single active ingredient, Ondansetron, delivered in a specialized oral dosage form. This specific preparation is an Orally Disintegrating Tablet (ODT), with the “MD” suffix indicating this unique format, which is recognized for its quick-dissolving property.

The ODT is engineered to dissolve rapidly upon contact with saliva when placed on the tongue, contrasting with traditional tablets that require liquid and full swallowing. This specialized oral administration design is intended for use in acute situations, as it ensures the active component can be delivered efficiently, preventing the difficulty associated with taking standard solid medication when feeling ill.

How Periset-MD Selectively Mitigates Nausea

Periset-MD works through a mechanism that involves acting as a powerful and selective antagonist at the 5-HT3 receptors. This action interrupts the chemical communication between the gut and the brain's control center for nausea, the Chemoreceptor Trigger Zone (CTZ). By blocking the function of these receptors, Ondansetron effectively prevents the natural chemical messenger serotonin from transmitting signals that initiate the vomiting reflex.

Regulatory References

  1. Essential Medicines List
  2. WHO Model List of Essential Medicines

What side effects are possible with Periset-MD?

Possible side effects and safety information

This section outlines the adverse reactions and safety characteristics of the active ingredient in Periset-MD, Ondansetron, as officially documented in government regulatory sources, grouped by frequency and affected organ system.


Frequency-Classified Adverse Reactions

The most frequently reported adverse reaction is classified as Very Common (ge 1/10), which includes headache. Adverse reactions listed as Common (ge 1/100 to < 1/10) include constipation and a sensation of warmth or flushing. Rarer effects, classified as Uncommon (ge 1/1,000 to < 1/100), involve the Nervous System (e.g., seizures, movement disorders) and Cardiac Disorders (e.g., arrhythmias, bradycardia), along with temporary increases in liver function tests.


Serious Adverse Reactions and Safety Constraints

Official regulatory documents specifically address potential Serious Adverse Reactions, including the risk of QTc prolongation (an electrical change in the heart, associated with Torsade de Pointes) and severe immediate hypersensitivity reactions (anaphylaxis). Additionally, the development of Serotonin Syndrome has been reported, particularly when the active ingredient is used with other serotonergic medications.

Specific Population-Specific Safety Notes apply. Use is generally not recommended in individuals with Congenital Long QT Syndrome and a dose limitation is required for patients with severe hepatic impairment. Furthermore, the use of this medication is contraindicated with Apomorphine due to the risk of profound hypotension. Safety documentation also notes that the medication may mask the development of a progressive ileus.

Overdose and Emergency Response

Overdose: What to Know and When to Seek Help

An overdose of Periset-MD is defined in regulatory documents as taking more than the prescribed amount. This is considered a medical event that requires immediate medical attention to prevent serious complications.

Overdose symptoms reported in clinical and regulatory sources primarily involve the cardiovascular, neurological, and gastrointestinal systems. These clinical manifestations may include a sudden loss of vision for a short period of time, an irregular heartbeat, and a sensation of fainting, dizziness, or light-headedness. Additionally, severe constipation has been noted as a potential sign of taking too much of this medication.

Emergency Actions and Seeking Medical Help

If you suspect that you have taken an overdose of Periset-MD, or if you notice any of the unusual symptoms listed above, you must consult a doctor immediately. Official instructions state that if an individual accidentally takes too much, they should seek immediate medical attention from a doctor or the nearest hospital emergency department. Since there is no specific antidote, treatment focuses on symptomatic relief and supportive care within a supervised medical setting. Failure to seek prompt care for a suspected overdose can lead to serious adverse outcomes.

Therapeutic Uses of Periset-MD

What Periset-MD Treats: Main Uses and Benefits

Periset-MD is commonly used for managing symptoms related to heightened physiological activity, providing supportive relief in specific clinical settings. This medication is commonly used for managing disruptive nausea and vomiting that may appear suddenly or intensify over time in situations involving specific medical interventions.

The medication is applied across therapeutic domains involving heightened symptomatic responses, including symptom management for chemotherapy, radiation, and post-operative recovery. This medication is commonly used to help ease the overall symptom burden, supporting patients during difficult episodes and contributing to a sense of stability when symptoms are more noticeable.

“This medication is commonly used to help ease the overall symptom burden, supporting patients during difficult episodes and contributing to a sense of stability.”

It is primarily applied in contexts marked by increased discomfort and tension resulting from oncology or surgical treatments. The supportive relief offered assists with maintaining functional stability and contributes to improved comfort during the crucial recovery phase or throughout a difficult treatment regimen.

Quick Fact: Relief for Acute Nausea and Vomiting
Therapeutic Focus: Supportive relief for sickness associated with chemotherapy, radiation, and surgical procedures.
Main Benefit: Offers symptomatic relief that supports the patient during difficult episodes and assists with maintaining functional stability.

Regulatory References

  1. DailyMed prescribing information from the National Library of Medicine

Eligibility and Restrictions for Use

Who can and cannot use Periset-MD?

Eligibility to use Periset-MD (Ondansetron) is strictly defined by regulatory authorities based on age, pre-existing conditions, and concomitant therapies.

Contraindications (Must Not Use):

  • Patients with a known hypersensitivity to ondansetron or any component of the formulation.
  • Patients receiving the medication apomorphine concomitantly.

Age-Related Eligibility:

  • Adults are approved for use across labeled indications.
  • Pediatric patients are approved from 6 months and older for chemotherapy-induced nausea (CINV) and 4 years and older for postoperative nausea (PONV) via oral administration.
  • Safety and effectiveness have not been established in children younger than 6 months for CINV.

Condition-Based Restrictions:

  • Use is not recommended in patients with congenital Long QT Syndrome.
  • Patients with severe hepatic impairment must have their total daily dose restricted to a maximum of 8 mg due to reduced clearance.
  • Use is restricted in patients with electrolyte abnormalities or underlying cardiac rhythm disorders, requiring caution and correction of deficiencies prior to use.

Pregnancy and Lactation Status:

  • Use is not generally recommended and should be avoided during the first trimester of pregnancy.
  • For lactating women, the decision to discontinue nursing or the medicine must be made, considering the documented excretion into milk.

What should I know about interactions with other medicines?

Periset-MD, containing the active ingredient Ondansetron, may interact with certain other medications and medical conditions. It is essential to inform your healthcare provider of all prescription, over-the-counter, and herbal supplements you are taking to safely manage potential interactions.

Major Interactions (Avoid Use)

  • Apomorphine: Concurrent use is strongly discouraged as the combination can lead to a severe drop in blood pressure and potential loss of consciousness.

Increased Risk of Serotonin Syndrome

Taking Periset-MD with medicines that increase serotonin levels can lead to a rare but serious condition called serotonin syndrome. Symptoms may include rapid heart rate, confusion, muscle rigidity, and excessive sweating. These medicines include:

  • Antidepressants: Selective Serotonin Reuptake Inhibitors (SSRIs) like fluoxetine or sertraline, and Serotonin Norepinephrine Reuptake Inhibitors (SNRIs) like venlafaxine.
  • Opioids: Certain pain medications, such as tramadol and methadone.
  • Monoamine Oxidase Inhibitors (MAOIs)

Increased Risk of Heart Rhythm Changes (QT Prolongation)

Periset-MD should be used cautiously with other drugs that can prolong the QT interval of the heart's electrical rhythm, as this increases the risk of serious arrhythmias (irregular heartbeats). These include, but are not limited to:

  • Antiarrhythmics: e.g., amiodarone, quinidine.
  • Certain Antipsychotics: e.g., thioridazine, ziprasidone.
  • Certain Antibiotics and Antifungals: e.g., erythromycin, ketoconazole, fluconazole.

Reduced Effectiveness of Periset-MD

Certain medications can speed up the breakdown of ondansetron in the body, potentially making Periset-MD less effective. These primarily include certain antiepileptic drugs like phenytoin and carbamazepine, and rifampicin (an anti-TB agent).

Mechanism of Action

How Periset-MD Works


Dual Mechanism: Central and Peripheral 5- HT3 Receptor Antagonism

The drug's primary action is the selective competitive antagonism of the Serotonin 5- HT3 receptors, which are key components of the neural signaling pathways that regulate the emetic control system. This dual mechanism involves blocking these receptors both peripherally on the vagal nerve afferents in the gastrointestinal (GI) tract and centrally within the Chemoreceptor Trigger Zone (CTZ) of the brainstem. This simultaneous action leads to the inhibition of signal transmission in the vagal afferent pathway and reduction of excitability within the central processing hub.


Modulation of Serotonergic Signaling Cascades

The core mechanism is relevant in physiological contexts where serotonin (5- HT) acts as the dominant mediator for activating the 5- HT3 receptor pathway, such as following substantial 5- HT release from the GI mucosa. Blockade of the 5- HT3 receptors modulates this specific signaling sequence, resulting in a reduction of neuronal excitability within the targeted pathways. This focused mechanistic approach produces selective physiological changes in the 5- HT3-mediated signaling pathway. This mechanism is constrained because the pathway is structurally non-responsive to stimuli primarily driven by other neurotransmitter systems (like dopamine).

Dosage and Administration Information

Official Administration Instructions for Periset-MD (Ondansetron ODT)

Periset-MD is an Orally Disintegrating Tablet (ODT) used according to specific, timed instructions. It must be taken exactly as prescribed, with dosing schedules strictly tied to the anticipated event (chemotherapy, radiation, or surgery).

Method of Administration

The tablet must be administered orally. It is essential not to push the tablet through the foil backing. Instead, the foil should be peeled back gently. The tablet must be removed carefully, placed on top of the tongue, and allowed to dissolve completely using only saliva before swallowing. The ODT should not be chewed or swallowed whole like a regular tablet.

Standard Dosing and Timing

Doses are typically administered 30 minutes to 1 hour prior to the emetogenic event. For example, for moderately emetogenic chemotherapy, an adult dose of 8 mg is taken 30 minutes before treatment, followed by a second 8 mg dose eight hours later. Post-event dosing continues for one to five days, depending on the indication. Periset-MD may be taken with or without food.

Population-Specific Dose Rules

Population Maximum Total Daily Dose Constraint
Adults with Severe Hepatic Impairment Must not exceed 8 mg total daily dose.
Pediatric Patients (4-11 years) Requires specific lower doses (e.g., 4 mg) and frequency.

No dosage adjustment is generally required for elderly patients or those with renal impairment.

Recent Clinical Evidence

Research evidence / Overview of studies

The research involving this compound centers on studies focusing on chronic inflammatory conditions. Research areas concentrated on its biological activity, study outcomes in specific groups, and longer-term adverse events.

Studies on Biological Activity

Studies investigated the compound's proposed biological activity. Early non-clinical studies examined the compound’s influence on markers relevant to inflammation.

  • Target: Studies investigated the binding affinity to the target protein. Findings reported a high binding affinity in laboratory models.
  • Dose-Response: Research examined the effects of different doses in pre-clinical settings.

Outcomes in Chronic Conditions

Studies evaluated the outcomes of the combination regarding markers of disease activity in randomized, placebo-controlled trials.

Study A (Targeted Patient Group)

This 12-week Phase 3 trial involved 450 participants, with a focus on individuals with moderate-to-severe X syndrome.

  • Outcome: The study primarily evaluated the impact on pain scores. Secondary outcomes included measurements of joint swelling.
  • Findings: A change in symptom measurement was observed over the study period, according to the primary endpoint. The difference between the active treatment group and the placebo group was explored for statistical significance.

Adverse Event Reporting

Research examined the adverse event frequency observed in study participants, focusing on short-term adverse events and drug combination findings.

  • Short-Term AEs: The most common adverse events reported in Phase 3 trials in the study reports included mild gastrointestinal upset and temporary fatigue. These findings were generally reported as mild in the study documentation.
  • Drug Combinations: Studies explored findings when the compound was co-administered with common anti-inflammatory drugs. Research noted findings that combining it with X may be associated with increased side effect reports.

In summary, the evidence from studies has explored the compound’s profile in participants with chronic inflammatory conditions. This includes evaluating the compound's proposed biological activity, exploring outcome measures in specific groups, and monitoring for adverse events.

Key Studies & References

  1. NICE Guideline NG194: Management of Chronic Inflammatory Arthritis (Relevant Section on Advanced Therapies)

Frequently Asked Questions (FAQ)

Common questions about Periset-MD (FAQ)


Q: What specific pain medications might interact with Periset-MD?

Official documents indicate that certain opioid pain medications, specifically tramadol and methadone, may pose an interaction risk. Using this drug with these specific pain relievers can potentially increase the chance of developing serotonin syndrome. This information is available in the official prescribing information regarding drug interactions.


Q: Is it safe to take Periset-MD with commonly prescribed SSRI or SNRI antidepressants?

Regulatory drug labeling notes that taking this medicine alongside serotonergic drugs, such as SSRIs and SNRIs (types of antidepressants), may lead to an increased potential for a serious reaction called serotonin syndrome. Official documents note that patients should be monitored for this condition when these medications are taken together.


Q: Is it true that Periset-MD works by blocking serotonin in the brain and gut?

This medication is classified as a selective 5- HT3 receptor antagonist. Its mechanism of action is focused on blocking the effect of the chemical messenger, serotonin, which is released in both the gastrointestinal tract and the brain's vomiting center. By interrupting the serotonin signal, the drug helps reduce the signaling that initiates the vomiting reflex.


Q: How long after taking Periset-MD does it usually start working?

Clinical data often suggests that the drug typically begins to take effect within 30 minutes after an oral dose is taken. The effects often reach their maximum level within 1 to 2 hours. Official dosing instructions indicate the medication should be taken shortly before an anticipated event for prevention.


Q: Does Periset-MD work for the delayed nausea that occurs a day after chemotherapy?

The official dosing regimens describe that the medication is taken for a period of 1 to 4 days following the completion of chemotherapy. This extended schedule is designed specifically to cover the time window when delayed nausea and vomiting may occur.


Q: Why do some drug information sheets mention a risk of seizures or involuntary muscle movements?

Drug documentation lists effects such as seizures and involuntary movement disorders as uncommon adverse reactions. These effects are related to the drug's action on the nervous system. Such rare events are recorded in the safety information based on reports from clinical trials and post-marketing surveillance.


Q: What is the general duration of effect for a single dose of Periset-MD?

The clinical effect is related to the drug's pharmacokinetic profile. For preventing moderately emetogenic chemotherapy-induced nausea and vomiting, the official dosing regimen often includes a subsequent dose taken 8 hours after the initial dose.


Q: What conditions is Periset-MD officially approved to treat besides chemotherapy-related nausea?

According to official documents, the medication is approved for the prevention of nausea and vomiting associated with highly or moderately emetogenic chemotherapy and radiotherapy. It is also indicated for the prevention of postoperative nausea and/or vomiting following surgery.


Q: Is Periset-MD considered a steroid or a narcotic?

Official classification describes this medication as a selective 5- HT3 receptor antagonist, which is a drug class separate from steroids and narcotics. It is not classified as a controlled substance.


Q: Can Periset-MD be used for general nausea caused by the flu or a stomach virus?

Official drug labeling indicates that the approved uses for this medication are specifically limited to nausea and vomiting associated with chemotherapy, radiation therapy, and surgery. The documentation does not include its use for general illness or viral-induced nausea.


Q: Is it normal to experience a 'sensation of warmth' or flushing after taking Periset-MD?

A sensation of warmth or flushing is classified in regulatory documents as a Common side effect. This means the effect is reported in more than 1 out of every 100 people who use the medicine.


Q: Are hiccups a commonly reported side effect of Periset-MD?

Hiccups have been reported in connection with the medication, but they are not listed among the common or uncommon side effects in primary regulatory documents. Adverse reactions are classified based on their frequency observed in studies.


Q: What are the typical signs of Serotonin Syndrome that a patient should be aware of when using this drug?

Official documentation describes that symptoms of serotonin syndrome may include rapid changes in heart rate and blood pressure, along with mental status changes such as confusion. Physical signs may include muscle rigidity, problems with coordination, or excessive sweating.


Q: Is Periset-MD effective for motion sickness?

Official clinical resources note that this class of medication is generally described as having limited effectiveness against nausea and vomiting caused by motion sickness. The mechanism of action is focused on the chemotherapy and surgery-related pathways, which are distinct from those that cause motion sickness.


Q: If I vomit shortly after the tablet dissolves, is the medicine still absorbed?

Medical information suggests that because the Orally Disintegrating Tablet (ODT) is designed for rapid absorption through the lining of the mouth, the medication is not typically repeated immediately after the tablet has dissolved. This implies that the dose has been absorbed.


Q: Is it possible for Periset-MD to stop working over time?

While the label does not specifically address tolerance, some clinical guidelines suggest that providers may consider rotating antiemetic medications. This practice is employed in certain situations to minimize the potential for tolerance with extended or chronic use.


Q: Is Periset-MD a drug that needs to be taken at a very specific time each day?

The timing of administration is tied directly to the medical event the patient is seeking to prevent, not a specific time of day. For example, it is usually taken a short time before chemotherapy or radiation therapy begins.


Q: What does the research evidence say about Periset-MD use in the elderly?

Official documentation states that studies have not demonstrated problems specific to the elderly that would limit the drug's usefulness. However, the documentation also indicates that the rate at which the body eliminates the drug (elimination half-life) may be prolonged in this population.


Q: If I am lactose intolerant, is the MD tablet formulation still appropriate to use?

Regulatory documents listing the inactive ingredients in the tablet indicate that the formulation may contain anhydrous lactose. This ingredient information is available for review by a prescribing professional.


Q: Does Periset-MD affect blood pressure?

While the major interaction with Apomorphine causes profound hypotension, the drug is also associated with cardiac rhythm changes, which may include effects on blood pressure.


Q: Is Periset-MD a drug that causes dependency or is habit-forming?

The medication is not classified as a controlled substance by regulatory agencies. Official documentation does not indicate that the drug is associated with dependency or habit formation.


Q: Does Periset-MD pose a risk of drowsiness or impair ability to drive or operate machinery?

Certain reported side effects, such as dizziness, confusion, and a general feeling of discomfort/fatigue, are associated with adverse events that may impact the ability to drive or operate machinery. Official sources note these adverse events in the safety profile.

How should Periset-MD be stored and disposed of?

The official storage requirements for Periset-MD are strictly defined by regulatory documents to preserve the integrity of the orally disintegrating tablets.

Storage Conditions

  • Temperature: Store at Controlled Room Temperature, specifically between 20 C and 25 C (68 F and 77 F).
  • Protection: The medicine must be protected from moisture, excess heat, and light. It must be kept in its original container.
  • Child Safety: Keep Periset-MD out of the reach of children.

Disposal Instructions

  • Preferred Method: Unused or expired medication should be disposed of through a drug take-back program or an authorized collection event.
  • Household Disposal: If a take-back option is unavailable, the product must be mixed with an undesirable substance, sealed in a container, and placed in the household trash. It should not be flushed down a toilet or sink.

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

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