Opiren

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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 Opiren

Quick Facts

Property Description
Active ingredient (INN) Lansoprazole
Pharmacological class Proton Pump Inhibitor (PPI)
Typical Forms Hard Gastro-Resistant Capsules; Orally Disintegrating Tablets (FLAS)
General use Reducing stomach acid
Origin Synthetic compound

What Type of Medicine is Opiren?

Opiren, which contains the active ingredient Lansoprazole, is a prescription medicine categorized as a Proton Pump Inhibitor (PPI). This class of drugs is clinically recognized for its ability to effectively and selectively block the mechanism responsible for acid production in the stomach. Opiren’s primary role is essential in managing conditions that require a sustained reduction of gastric acid, such as providing reliable and lasting relief from issues caused by excess stomach acid, like heartburn.


Opiren's Composition and Form

The active component in Opiren, Lansoprazole, is a synthetically derived benzimidazole compound manufactured under strict pharmacological control. The medicine is available in two oral forms. Opiren is commonly supplied as a hard gastro-resistant capsule, or as an Orally Disintegrating Tablet (FLAS) in some regions. The specialized gastro-resistant coating on the capsules ensures the active ingredient passes safely through the highly acidic stomach environment before dissolving in the intestine, maximizing its therapeutic effect.

Regulatory References

  1. NIH MedlinePlus Drug Information on Lansoprazole

What side effects are possible with Opiren?

Possible Side Effects and Safety Information

The safety profile for Opiren, containing Lansoprazole, is established through formal regulatory classification of adverse reactions, categorized by frequency and the physiological system affected. The medicine's official documentation defines three primary frequency tiers for potential effects.

  • Common adverse reactions, reported in 1% or more of patients, typically involve the Gastrointestinal System and the Nervous System. These include diarrhea, abdominal pain, nausea, constipation, headache, and dizziness. Increases in liver enzyme levels are also listed as common.
  • Uncommon effects include depression, joint pain (arthralgia), and muscle pain (myalgia).

Serious adverse reactions are specifically documented in official prescribing information. These include Severe Cutaneous Adverse Reactions (SCARs), such as Stevens-Johnson Syndrome (SJS), Acute Tubulointerstitial Nephritis (TIN), and the potential for severe diarrhea known as Clostridium difficile-Associated Diarrhea (CDAD).

Safety Considerations for Long-Term Exposure

Official safety documents explicitly link certain risks to the duration of treatment. Long-term use (one year or longer) is associated with an increased risk for bone fractures of the hip, wrist, or spine, and decreased magnesium levels (Hypomagnesaemia). Additionally, the development of benign Fundic Gland Polyps may increase with extended exposure beyond one year. For specific patient populations, caution is noted; for example, dose reduction is a consideration in patients with severe hepatic impairment.

Regulatory documentation emphasizes a key safety constraint: symptomatic response to treatment does not exclude the presence of gastric malignancy.

Overdose and Emergency Response

Overdose Scope

Element Official Regulatory Statement
Documented overdose presentations Specific acute clinical signs or unique symptom profiles are not extensively detailed in official labeling. Regulatory summaries focus instead on management actions.
Dose-related or exposure-related factors Clinical experience primarily references doses up to 600 mg, which are often observed to be without significant clinical consequence.
Emergency-response statements The regulatory guidance requires that in case of overdose, immediate medical help must be sought, and a Poison Control Center must be contacted.

Overdose Classifications

Element Official Regulatory Statement
Severity classification Outcomes are often described as being without significant clinical consequence or involving mild adverse events.
Antidote availability A specific antidote is not available for Lansoprazole.

Resulting Overdose Structure

Official overdose statements:

  • Treatment for overdose must be symptomatic and supportive.
  • Procedures such as gastric emptying and the administration of activated charcoal may be recommended for supportive management.
  • Lansoprazole cannot be removed from circulation by haemodialysis.
  • No unique or specific overdose management considerations for special populations are documented in the regulatory sections.

Connection to the overall overdose profile The official regulatory documents define the overdose profile primarily by the mandated actions required of the patient and healthcare providers. The urgent requirement to seek immediate medical assistance is necessary because no specific antidote exists, and management is strictly limited to established supportive care, such as symptomatic treatment. Furthermore, the drug’s properties confirm that it cannot be removed from the body by haemodialysis, reinforcing the focus on early symptomatic management.

Therapeutic Uses of Opiren

Main Uses and Benefits of Opiren

Opiren (lansoprazole) belongs to a class of medications known as proton pump inhibitors (PPIs). It is primarily used to manage conditions related to excessive gastric acid production. By reducing the amount of acid produced by the stomach, the medication helps alleviate symptoms and promotes the healing of the digestive tract.

Treatment of Gastric and Duodenal Ulcers

Opiren is used to treat active ulcers in the stomach (gastric ulcers) and the upper part of the small intestine (duodenal ulcers). It helps in the healing process of the ulcerated tissue and provides relief from the pain associated with these conditions. It is also utilized for the prevention of duodenal ulcers.

Gastroesophageal Reflux Disease (GERD)

This medication is frequently prescribed for the treatment of gastroesophageal reflux disease, commonly referred to as acid reflux. It is effective in managing both symptomatic GERD—addressing issues like heartburn and acid regurgitation—and erosive esophagitis, a condition where the lining of the esophagus has been damaged by stomach acid. Following initial treatment, it may be used for the long-term maintenance of healed erosive esophagitis.

Eradication of Helicobacter pylori

In patients with peptic ulcers caused by the bacterium Helicobacter pylori, Opiren is used as part of a combination therapy with specific antibiotics. The reduction in stomach acid creates an environment that allows the antibiotics to work more effectively in eliminating the infection, thereby reducing the risk of ulcer recurrence.

NSAID-Associated Gastric Ulcers

For individuals who require long-term treatment with non-steroidal anti-inflammatory drugs (NSAIDs), Opiren is used to treat stomach ulcers that may develop as a result of these medications. It is also indicated for reducing the risk of developing such ulcers in patients at risk who continue to use NSAIDs.

Hypersecretory Conditions

Opiren is indicated for the long-term treatment of pathological hypersecretory conditions, such as Zollinger-Ellison syndrome. In these cases, the stomach produces abnormally high levels of acid, and the medication helps to manage and maintain acid secretion at safer levels.

Therapeutic Benefits

  • Symptom Relief: Significant reduction in frequency and severity of heartburn and acid-related chest pain.
  • Tissue Healing: Promotes the repair of the esophageal and gastric mucosa damaged by acid exposure.
  • Prevention: Helps prevent the recurrence of ulcers and protects the digestive lining during necessary long-term medication use.

Eligibility and Restrictions for Use

Who Can and Cannot Use Opiren?

Eligibility for Opiren (Lansoprazole) is strictly defined by regulatory authorities based on age, physiological conditions, and existing health status.

Populations for Whom Use is Prohibited (Contraindications):

Opiren is formally contraindicated in patients with a known severe hypersensitivity to Lansoprazole or any component of its formulation. Co-administration with certain antiretroviral drugs, specifically Atazanavir and Rilpivirine-containing products, is also forbidden as it significantly affects the other medicine's efficacy. Additionally, certain formulations (like the Orally Disintegrating Tablet) are contraindicated in patients with Phenylketonuria (PKU) due to the presence of phenylalanine.

Age and Conditional Use Restrictions:

Use is established in adults and in pediatric patients aged 1 to 17 years for appropriate indications. However, safety and efficacy have not been established in children younger than 1 year of age, and its use is officially not recommended in infants.

Patients with moderate to severe hepatic impairment (liver disease) require caution, and a dosage reduction should be considered due to delayed drug clearance. Prior to treating a gastric ulcer, regulatory guidelines mandate that the possibility of an underlying malignant gastric tumour must be excluded, as Opiren may mask symptoms.

What should I know about interactions with other medicines?

Opiren’s interaction profile is officially documented across several domains, stemming from its effect on gastric pH and its metabolism via CYP enzymes.

Contraindicated and High-Risk Combinations

Co-administration of Opiren is contraindicated with certain antiretroviral agents, including Atazanavir and Rilpivirine. This restriction is formally documented in regulatory labeling due to the risk of significantly reduced plasma exposure of the antiretroviral agent. Other combinations, such as Warfarin and Tacrolimus, are classified as high-risk; the official constraints mandate close monitoring (monitoring INR for Warfarin and whole blood concentrations for Tacrolimus) due to the potential for increased drug concentrations.

Interactions Affecting Drug Exposure

Opiren influences the systemic exposure of other medicines through two main pathways. The first is a pharmacodynamic effect where gastric acid suppression alters the absorption of drugs requiring an acidic environment; this can reduce bioavailability for agents like Ketoconazole and Itraconazole, while increasing exposure for Digoxin. The second is a pharmacokinetic effect related to CYP enzyme inhibition, which may reduce the effectiveness of Clopidogrel by impeding the formation of its active metabolite. The official labeling notes that Opiren clearance is slower in patients with severe hepatic impairment.

Timing and Substance Constraints

Administration with certain substances requires mandated separation. The official regulatory text states that Opiren must be administered at least 30 minutes prior to Sucralfate to prevent physical interference that decreases Opiren's bioavailability. Additionally, concurrent use of CYP enzyme inducers, such as the herbal product St John's Wort, can markedly reduce Opiren's plasma concentrations.

Mechanism of Action

Irreversible Blockade of Acid Production

Opiren functions as a prodrug that undergoes chemical transformation when exposed to the high acidity within the secretory canaliculi of the stomach's gastric parietal cells. This activation generates a highly reactive metabolite that selectively and permanently binds to the H^+/K^+-ATPase, commonly known as the Proton Pump.

This binding is an irreversible inhibition achieved through the formation of a covalent disulfide bond with cysteine residues on the enzyme. By chemically locking the pump, the drug blocks the final step of acid secretion, preventing the efflux of hydrogen ions (H^+) into the stomach lumen.

Sustained Modulation of Gastric pH

The inhibition of the H^+/K^+-ATPase results in a sustained reduction in the output of gastric acid and a subsequent increase in the pH level within the stomach. This alteration of the intragastric environment is a key physiological consequence that facilitates the regeneration of damaged mucosal tissue.

Dosage and Administration Information

Official Administration Guidelines for Opiren (Lansoprazole)

This section outlines the proper use and administration of Opiren.

Administration Timing and Handling

Opiren should be taken once daily (or twice daily for H. pylori eradication regimens) and must be administered before eating, ideally 30 minutes prior to the first meal of the day. Taking the drug after food significantly reduces its absorption.

Dosage Form Procedural Rule Alternative Administration (If Swallowing Difficulty)
Delayed-Release Capsule Must be swallowed whole with liquid; do not crush or chew the capsule. Contents may be sprinkled onto a tablespoon of soft food (e.g., applesauce) or mixed with a small volume (60 mL) of juice and swallowed immediately.
Orally Disintegrating Tablet (ODT) Place on the tongue to disintegrate, then swallow; do not break, cut, or chew. N/A

Dosing and Population Rules

The standard adult dose is typically 15 mg or 30 mg once daily. For pathological hypersecretory conditions (e.g., Zollinger-Ellison Syndrome), the starting dose is 60 mg once daily, with daily doses exceeding 120 mg required to be administered in divided doses. The duration of the course is defined by the condition being managed, generally ranging from 2 to 8 weeks for acute treatment.

Dose Adjustments: Patients with severe hepatic impairment (Child-Pugh Class C) are typically advised to reduce the standard daily dose to 15 mg. For older adults, the 30 mg daily dose should not be exceeded unless there is a compelling clinical indication. If a dose is missed, it should be taken as soon as remembered, but not doubled to compensate for the missed dose.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Opiren

Evidence for Healing of Erosive Esophagitis and Ulcers

This section summarizes the pivotal, short-term randomized controlled trials (RCTs) and subsequent systematic reviews that examined the medicine's role in evaluating changes in mucosal damage, such as lesions found in the esophagus or stomach. Opiren was evaluated in numerous short-term RCTs, where participants were randomly assigned to receive the medicine, an inactive substance (placebo), or an active comparator compound. Research explored its use for conditions associated with cycles of stability and flare-ups, such as ulcers in the stomach (gastric) and the upper part of the small intestine (duodenal), and inflammation with damage to the esophagus (erosive esophagitis). Studies monitored patients over defined time intervals, typically four to eight weeks, focusing on objective outcomes such as endoscopic measurements. Findings describe patterns observed in the studies where the primary outcome—lesion healing—was recorded across observed populations. For conditions involving periods of heightened symptoms, research monitored the measured rates of bacterial presence after combined therapy for cases involving H. pylori.

Evidence for Short-Term Relief of Frequent Heartburn

For the context of frequent heartburn, Opiren was evaluated in controlled trials applied in studies examining patient-reported experiences. These trials were typically short-term and compared the medicine to an inactive pill (placebo). These investigations were relevant in trials assessing short-term or episodic symptom patterns, focusing on outcomes related to physical discomfort. Research explored short-term symptom changes, with findings indicating patterns related to the proportion of days and nights patients reported as being without symptoms. Data show patterns related to patient-reported outcomes describing perceived discomfort during these episodes. Follow-up durations were limited, typically 14 days, and there is limited information for continuous use beyond this short period.

Long-Term Studies and Maintenance of Status

Opiren was also observed in long-term research focusing on Maintenance of Status, particularly in conditions where symptoms may vary in intensity or those presenting with cycles of stability and flare-ups. Researchers conducted continuous observation studies to evaluate long-term acid output. For certain specialized populations, such as those with Zollinger-Ellison Syndrome (ZES), the medicine was observed in open-label settings for multiple years. Research monitored objective outcomes, specifically physiological markers related to high gastric acid output. Since the research often involved open-label designs without a randomized, contemporary control group, the data are still emerging regarding certain long-term effects associated with this class of medicine.

Frequently Asked Questions (FAQ)

Common questions about Opiren (FAQ)


Q: Is Opiren used for the relief of general heartburn or only for specific diagnoses?

Opiren (Lansoprazole) is indicated for treating specific diagnosed conditions such as ulcers and erosive esophagitis. According to official product information, it is also approved for the short-term treatment of frequent heartburn, which is defined as occurring two or more days a week. It is generally not recommended for immediate or occasional heartburn relief, as its mechanism requires time to take full effect.


Q: How long does it usually take for Opiren to start working and relieve symptoms?

Opiren is a long-acting medicine that works by irreversibly blocking the acid pumps in your stomach. Because of this sustained mechanism, symptom relief is not immediate; official information indicates that it may take 1 to 4 days for the full effects to be noticeable. To help achieve the full therapeutic effect, the medication is typically taken consistently as directed.


Q: Does Opiren provide immediate relief, or is it a long-term treatment?

Opiren is classified as an antisecretory compound, meaning it suppresses acid over a sustained period by blocking the proton pumps. It is not an immediate-relief medication. It is typically prescribed as a short-term course of treatment for healing, but in some cases, it may be used as a longer-term maintenance therapy.


Q: Is Opiren similar to other acid reducers like Zantac or Pepcid (H2 blockers)?

Opiren belongs to a class of drugs called Proton Pump Inhibitors (PPIs). This class works by blocking the final step of acid secretion in the stomach. Official regulatory information highlights that this mechanism is distinct from H2-receptor antagonists (like the active ingredients in Zantac or Pepcid), which suppress acid production through a different pathway.


Q: Is it normal to experience diarrhea or stomach discomfort when starting Opiren?

Yes, according to clinical trial data, diarrhea and abdominal pain are listed as common side effects, meaning they were reported by 1% or more of patients. These effects are generally reported as common, and when they occur, they are often experienced during the initial phase of treatment.


Q: Are there any serious side effects of Opiren that I should watch out for?

Official regulatory documents list several serious but rare adverse reactions, which include severe skin reactions (like Stevens-Johnson Syndrome), kidney inflammation (acute tubulointerstitial nephritis), and severe diarrhea (Clostridium difficile infection).


Q: Are there any specific foods or drinks that should be avoided while taking Opiren?

The official administration guidelines emphasize that the medicine should be taken before a meal, as food can significantly reduce its absorption. While regulatory labeling does not strictly forbid alcohol, alcohol consumption is known to increase stomach acid and could potentially counteract the medicine's effect.


Q: Can Opiren be taken with antacids, and if so, how long apart?

Official documentation mandates that certain substances, like the drug Sucralfate, must be taken at least 30 minutes after Opiren to prevent absorption interference. While a specific time separation is not mandated for common over-the-counter antacids, general guidance suggests separating the doses to help ensure Opiren's effectiveness.


Q: Can Opiren be used during pregnancy or while breastfeeding?

Official regulatory documents indicate that data on the use of Opiren during pregnancy is limited, and use is generally not recommended unless the potential benefit justifies the potential risk. Furthermore, it is not known if the medicine passes into human milk, and official information indicates that its use is generally not recommended during breastfeeding.


Q: Is there an age limit for who can use Opiren?

According to official product information, the use of Opiren is established for adults and for pediatric patients aged 1 to 17 years for appropriate indications. However, safety and effectiveness have not been established in children younger than 1 year of age, and regulatory documentation states that its use has not been established or recommended for infants.


Q: Is Opiren the same as lansoprazole or dexlansoprazole?

Opiren is a brand name for the active ingredient Lansoprazole. Dexlansoprazole is a distinct, but related, medicine with its own specific regulatory and chemical profile.


Q: Does the 'Dual Delayed Release' formulation of Opiren make it different from other drugs?

The formulation of Opiren is designed to be 'gastro-resistant' or 'delayed release.' This specialized coating prevents the active ingredient from being destroyed by the harsh acidic environment of the stomach. This allows the medicine to safely pass into the intestine, where it can be absorbed and become fully effective.


Q: Can taking Opiren interfere with the effectiveness of antibiotics?

Opiren is often intentionally used in combination with specific antibiotics for the eradication of H. pylori bacteria. However, because Opiren reduces stomach acid levels, it may potentially alter the absorption of antibiotics or other medicines that require an acidic environment to be effective.


Q: Why is Opiren sometimes prescribed along with antibiotics?

Official indications show Opiren is prescribed as part of combination therapy (dual or triple therapy) with certain antibiotics. This combination is specifically used for the treatment of an infection caused by the bacteria Helicobacter pylori (H. pylori) to help eradicate the bacteria and prevent the recurrence of ulcers.


Q: What are the typical signs that Opiren is starting to work for my condition?

The medicine’s primary goal is to reduce gastric acid output, which leads to the healing of damaged tissue and relief from acid-related symptoms. As the medicine takes effect, you should begin to notice a sustained reduction in symptoms like frequent heartburn or acid reflux.


Q: Is Opiren safe for people with known liver problems?

Official regulatory guidance advises caution for patients with moderate to severe liver impairment (hepatic impairment). In these cases, official guidelines suggest a dosage reduction may be considered due to delayed drug clearance.


Q: Is it possible for Opiren to cause a rash or skin sensitivity to the sun?

Official safety information lists severe skin reactions (SCARs) as potential, serious side effects. Additionally, there are regulatory warnings about Subacute Cutaneous Lupus Erythematosus (SCLE), which can manifest as a rash, particularly in areas exposed to sunlight.


Q: Can Opiren cause or worsen symptoms of lupus?

Official regulatory warnings indicate that lupus erythematosus (both cutaneous and systemic) has been reported in patients taking this class of medicine. Regulatory labeling notes that if signs or symptoms of lupus occur, healthcare providers are advised to consider discontinuation of the medicine.


Q: Is there any research on Opiren's use in children under the age of 12?

Yes, official regulatory documents state that use is established in pediatric patients aged 1 to 17 years for appropriate indications. Specific dosing regimens have been established for children aged 1 to 11 years based on their weight.


Q: Can Opiren increase the risk of developing stomach polyps?

Official safety information indicates that extended use of Opiren, particularly for periods of one year or longer, may increase the risk of developing benign Fundic Gland Polyps.


Q: What happens when you stop taking Opiren after long-term use?

Official regulatory labels do not provide specific guidance or protocols for stopping the medicine. The medicine is typically prescribed to heal a condition, and treatment may stop once healing is complete. Consulting with a healthcare professional is recommended for any decision regarding discontinuing long-term therapy.


Q: Does Opiren affect other mineral levels besides magnesium, like calcium or potassium?

Official safety information specifically links long-term use (one year or more) to a potential for decreased magnesium levels (hypomagnesaemia). The medicine may also decrease the absorption of Vitamin B12, but regulatory warnings do not cite a direct connection to calcium or potassium levels.


Q: Is a headache a common side effect when first taking Opiren?

Headache is listed in regulatory documents as a common adverse reaction, reported in 1% or more of patients during clinical trials. Although the documents do not specify the exact time of onset, common side effects are often noticed when a person first begins treatment.


Q: Can Opiren affect the results of certain medical tests?

Yes, regulatory warnings note that Opiren may interfere with specific laboratory tests, such as those that measure Chromogranin A (CgA). Official guidance advises that the medicine should be stopped for a specified period before certain tests.


Q: Can Opiren be taken with other herbal supplements or vitamins?

The official label explicitly mentions an interaction with the herbal product St John's Wort. Concurrent use of this supplement can significantly reduce the amount of Opiren in the body. Patients are generally advised to discuss all supplements and vitamins with their healthcare provider.


Q: Does Opiren interact with methotrexate?

Yes, official drug interaction information states that using Opiren together with high doses of methotrexate may increase the amount of methotrexate in the blood. This could potentially lead to toxicity, and the potential need for temporary cessation of Opiren may be reviewed by a healthcare professional.


Q: Is a dry mouth or throat a common complaint with Opiren?

In clinical trials, dry mouth or throat was not listed as a common side effect (occurring in 1% or more of patients). However, dry mouth has been mentioned in reports received after the medicine was released to the market (post-marketing reports).


Q: Can Opiren cause symptoms like dizziness or feeling tired?

Official adverse reaction reports list dizziness as a common side effect. While feeling tired (fatigue) is not listed as common, it can be a symptom of hypomagnesaemia (low magnesium levels), which is a serious, long-term side effect associated with the medicine.

How should Opiren be stored and disposed of?

How to Store and Dispose of Opiren

Opiren must be stored according to official regulatory requirements to ensure its stability and effectiveness. The product label mandates storage at a specific temperature (e.g., below 25, C or 30, C) and requires protection from moisture and light. To maintain its integrity, the medicine must be kept in its original packaging and the container should be tightly closed if applicable.

Key Storage and Handling Rules:

  • Temperature: Store below the stated maximum temperature.
  • Protection: Keep product in the original container to protect from light and moisture.
  • Freezing: Do not freeze the medicine.
  • Child Safety: Always store Opiren out of the sight and reach of children.

Disposal Requirements:

Unused or expired Opiren must be disposed of following official guidelines. The required method is typically through an authorized medication take-back program. Do not dispose of the medicine by pouring it down a sink or toilet.

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

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