Ulcepac

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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 Ulcepac

Quick Facts

Property Description
Active Ingredient Ranitidine Hydrochloride
Form Tablet, Syrup, Injection solution
Pharmacological Class Histamine H2-receptor antagonist (H2-blocker)
Common Use Reduction of gastric acid secretion
Origin Synthetic (Small Molecule)

What Type of Medicine is Ulcepac and What Does it Contain?

Ulcepac is a medicinal preparation whose sole active component is the chemically synthetic small molecule, Ranitidine Hydrochloride. This compound is classified as a Histamine H2-receptor antagonist, commonly known as an H2-blocker, due to its specific action in the body. As a single-ingredient product, Ulcepac relies entirely on the action of Ranitidine Hydrochloride, an established compound whose mechanism is well understood in pharmacology.

Histamine H2-receptor antagonists are used to inhibit acid secretion. This means the medicine is specifically designed to modulate the body's natural acid-secreting process by acting as an antagonist at the H2 receptors on stomach cells, blocking the signal for acid production.


Ulcepac Dosage Forms and General Purpose

The overarching therapeutic purpose of Ulcepac is to function as an effective antiulcer agent by creating a less irritating and acidic environment in the upper digestive tract. The medicine is manufactured in various pharmaceutical preparations to accommodate different needs and routes of administration. These commonly include solid Tablets for oral ingestion, as well as a sterile Injection solution for intravenous or intramuscular use when oral intake is not feasible.

The fundamental benefit stems from its core action of reducing the amount of gastric acid secretion. As a substance that helps manage gastric-acid associated conditions, Ranitidine functions by decreasing acid output. By successfully lowering the acid levels, the medication aids in relieving the uncomfortable burning sensation or discomfort that results from acid irritation.

Regulatory References

  1. National Institutes of Health (NIH)
  2. LiverTox - NIH

What side effects are possible with Ulcepac?

Possible side effects and safety information

The official safety characteristics of Ulcepac, containing Ranitidine Hydrochloride, are systematically classified by regulatory authorities using frequency and System-Organ Classes (SOC), providing a framework for its risk profile.

Adverse Reaction Scope

The most frequently reported effects are categorized as Uncommon (occurring in ge 1/1,000 to < 1/100 patients), typically involving gastrointestinal disorders such as abdominal pain, constipation, and nausea. These gastrointestinal symptoms are noted to mostly improve during continued treatment.

Very Rare reactions (< 1/10,000) span multiple SOCs, including Blood and Lymphatic System ( agranulocytosis, pancytopenia), Hepatobiliary Disorders ( hepatitis with or without jaundice), and Immune System ( anaphylactic shock). Other Very Rare serious events include acute pancreatitis and acute interstitial nephritis.

Safety Considerations

Official labeling addresses specific safety considerations for certain patient groups. Reports of reversible mental confusion, depression, and hallucinations occur more frequently in severely ill and elderly patients. In patients with renal impairment, accumulation of the substance is expected due to reduced renal excretion.

Restrictions and Limitations

A critical safety constraint in the label is the need to exclude gastric malignancy before initiating treatment, as a symptomatic response does not preclude its presence. Furthermore, the substance should be avoided in patients with a history of acute porphyria as it may precipitate attacks. A major regulatory action involved the market withdrawal of previous formulations due to the presence of N-nitrosodimethylamine (NDMA), a probable human carcinogen, which was found to increase over time and at higher temperatures.

Overdose and Emergency Response

The section titled Ulcepac Overdose and when to seek help contains information derived from the official prescribing information regarding situations of overexposure to the active component, Ranitidine Hydrochloride.

Overdose Scope

Documented overdose presentations:

  • Transient adverse effects similar to those experienced in normal clinical use.
  • Abnormalities of gait.
  • Hypotension.

Physiological systems affected (as stated in label):

  • Cardiovascular system (manifested as hypotension).
  • Nervous system (manifested as abnormalities of gait).

Dose-related or exposure-related factors (if applicable):

  • Acute ingestions of up to 18 g orally have been reported.

Emergency-response statements (as written in official documents):

  • Contact a Poison Control Center right away.
  • Get medical help right away.

Resulting Overdose Structure

Official overdose statements:

  • The regulatory guidance mandates explicit emergency actions be taken immediately, requiring individuals to get medical help right away and contact a Poison Control Center.
  • Management involves the employment of usual measures to remove any unabsorbed material from the gastrointestinal tract.
  • Subsequent management requires continuous clinical monitoring and the provision of appropriate symptomatic and supportive therapy for any developing clinical signs.
  • No specific antidote is explicitly documented in the official regulatory sections for treating Ulcepac overdose.

Therapeutic Uses of Ulcepac

Quick Facts

  • Target Condition: Helicobacter pylori (H. pylori) infection
  • Primary Use: Supporting the eradication of H. pylori bacteria
  • Therapeutic Domain: Conditions related to H. pylori, such as peptic ulcer disease

Ulcepac is a combination product used in the therapeutic management of Helicobacter pylori infection in adults. The primary goal of this therapy is the successful eradication of the H. pylori bacteria from the gastrointestinal tract. Eradicating the bacteria is a widely utilized approach to help address conditions where the infection plays a major role, such as peptic ulcers (duodenal and gastric ulcers).

This regimen works to manage the bacterial load, which may help support the healing process of the gastric lining and reduce the potential for recurrence of peptic ulcer disease related to the infection. It may also be utilized to help manage other gastrointestinal issues where H. pylori is a contributing factor.

Treatment protocols involving combinations like Ulcepac are important in clinical practice to help overcome potential bacterial resistance. Such multi-agent regimens are designed to achieve high eradication rates and follow established therapeutic approaches for managing H. pylori.

Eligibility and Restrictions for Use

Eligibility for Ulcepac

Ulcepac eligibility is strictly determined by governmental regulatory documentation, which defines absolute exclusions and conditional use based on age, physiological status, and pre-existing conditions.

Contraindications and Absolute Exclusions

Ulcepac must not be used by individuals with a known hypersensitivity to ranitidine or any component in the formulation. Use is also absolutely contraindicated in patients with a history of acute porphyria, as the medicine may precipitate acute attacks.

Age and Life-Stage Eligibility

Use is established for adults and adolescents (12 years and over). For children, the minimum established use is from 3 years of age and over 30 kg body weight. The safety and efficacy of Ulcepac are not established in neonates (newborn patients). During pregnancy and lactation, use is conditional and restricted to only if considered essential by a healthcare professional.

Condition-Specific Restrictions

Eligibility is restricted for those with impaired renal function (creatinine clearance < 50 mL/min), requiring close medical supervision due to the risk of drug accumulation. Additionally, in patients with a gastric ulcer, the possibility of malignancy must be excluded before starting Ulcepac, as the medicine may mask symptoms of carcinoma.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Ulcepac (Ranitidine Hydrochloride) has officially documented interaction patterns that primarily relate to its influence on gastric pH and its use of the renal cationic transport system for clearance.

Pharmacokinetic Interaction Patterns

Classification Interacting Substance Official Interaction Description
pH-Dependent Effect Erlotinib, Ketoconazole, Atazanavir Co-administration may decrease their bioavailability and exposure (AUC/Cmax).
pH-Dependent Effect Triazolam, Midazolam Co-administration results in increased plasma concentrations and exposure.
Renal Transporter Effect Procainamide Ranitidine may reduce its renal clearance, leading to elevated plasma levels.
Timing-Sensitive High-Potency Antacids Simultaneous administration is reported to decrease the absorption of Ranitidine.
Special Caution Coumarin Anticoagulants (e.g., Warfarin) Official reports note altered prothrombin time; close monitoring is required.

Official Regulatory Notes

Ranitidine is avoided in patients with a history of acute porphyria as documented in labeling. Since the medicine is primarily cleared by the kidney, patients with impaired renal function (Creatinine Clearance less than 50 ml/min) may experience accumulation and elevated plasma concentrations, necessitating attention to its co-administration profile. Absorption of Ranitidine is not significantly impaired by food.

Mechanism of Action

How Ulcepac Works

Ranitidine's mechanism involves modulation of gastric acid secretion through interaction with specific signaling pathways within the stomach lining.


Histamine H2 Receptor Antagonism

The core action involves the selective blockade of the Histamine H2 receptor (H2 R) on the gastric parietal cells. Ranitidine acts as a competitive antagonist, reversibly binding to the H2 R and preventing the endogenous mediator, histamine, from activating the receptor. The mechanism targets the primary histaminergic signal that promotes acid release, causing a reduction in the acid output rate of the parietal cells.


Interruption of the Acid Secretion Cascade

By blocking the H2 R, the drug interrupts the subsequent intracellular signaling cascade involving cAMP and Protein Kinase A. This interruption prevents the necessary activation of the final acid-secreting pump, the Hydrogen-Potassium ATPase ( H^+/ K^+ ATPase). The mechanism involves alteration of an acid regulatory process, resulting in the attenuation of both basal (resting) and stimulated acid output.


Modulation of Intragastric pH

The resulting physiological effect of the blockade is a decrease in the concentration of hydrogen ions ( H^+) in the stomach fluid. This leads to an increase in intragastric pH. This physiological change is the direct consequence of the H2 receptor blockade.

Dosage and Administration Information

How to Use Ulcepac

Ulcepac, which contains the active ingredient Ranitidine Hydrochloride, is administered using specific therapeutic protocols. The primary routes of administration include oral (PO), typically for general therapy and maintenance, as well as Intravenous (IV) and Intramuscular (IM) routes for patients unable to take the medicine by mouth.


Dosing Regimens

Usage follows distinct schedules for acute and maintenance phases. For active conditions, the standard adult oral dose is often 150 mg twice daily (BID) or 300 mg once daily (QD), usually taken at bedtime. For long-term management (maintenance therapy), the regimen typically reduces to 150 mg QD. The course of treatment for acute conditions generally lasts 4 to 8 weeks, though maintenance therapy may extend up to one year.


Administration Conditions and Special Populations

Oral Ulcepac may be administered with or without food or antacids. The once-daily 300 mg dose should generally be taken at night, after the evening meal or at bedtime.

For patients with impaired renal function (creatinine clearance < 50 mL/min), the dosage is adjusted to 150 mg every 24 hours to account for reduced drug clearance.

In the hospital setting, the 50 mg IV injection requires dilution to a 20 mL volume (≤ 2.5 mg/mL) and must be administered slowly over at least 5 minutes to comply with procedural guidelines.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Ulcepac


Evidence for Healing of Duodenal Ulcers

This section will summarize the research studies and clinical trials that was studied for its effect on the process of healing of ulcers in the duodenum. The summary will focus on what kinds of comparative studies exist for this indication.

Ulcepac was evaluated in studies exploring how symptoms change over time and examining outcomes related to physical discomfort. These were often comparative studies, where one group received Ulcepac and another received a different treatment or a placebo (an inactive substance) to monitor the process over defined time intervals.

Research describes patterns related to observed changes in duodenal ulcers in the observed populations. Findings indicate that research examined patterns related to changes in the ulcer site in conditions characterized by acute or disruptive episodes. Studies report how the size of the ulcers evolved in the observed populations during the short-term study periods.

However, the evidence quality varies across studies, and findings describe patterns observed in specific research settings, not individual predictions. Comparative evidence against some other treatment approaches is lacking, and the research provides insight into short-term changes, but does not determine whether an individual will respond similarly.


Evidence for Eliminating Helicobacter pylori Infection

This section will outline the evidence from studies that specifically assessed Ulcepac's effect on the elimination (eradication) of H. pylori bacteria from the stomach, which is a focus of research for preventing ulcer recurrence.

Studies focusing on episodes where symptoms become more noticeable have explored Ulcepac’s effect on the elimination (eradication) of the H. pylori bacteria, which is associated with many duodenal ulcers. This research examined outcomes reflecting daily functioning or activity level during the treatment phase. Ulcepac was evaluated in research contexts involving the study of fluctuating or unstable symptoms typical of conditions involving periods of heightened symptoms.

Findings indicate that the combination of medicines in Ulcepac was studied for its patterns related to eliminating the infection. Studies monitored patterns of elimination (clearance) of the bacteria, which is a key measure used in research exploring short-term symptom changes. Data show patterns related to how often the bacteria were successfully cleared in the studied groups.

Research is ongoing, and data are still emerging, particularly regarding how the bacteria may become resistant to the medicines over time. While studies show patterns related to eradication rates, results apply only to the populations studied, and findings were mixed in some instances depending on the study design and location.


Long-term Studies and Follow-up

This section will summarize available information from studies that tracked patients over an extended period to evaluate the durability of the observed patterns of ulcer healing and ongoing elimination patterns of H. pylori, highlighting what is known and unknown about outcomes beyond the initial treatment phase.

Research exploring short-term symptom changes and outcomes linked to inflammatory or irritative states typically covers the initial period of treatment and healing. However, studies have also explored long-term outcomes to assess the durability of the observed patterns and patterns related to preventing ulcer recurrence—conditions characterized by fluctuating or episodic manifestations.

Evidence contributes to understanding symptom patterns over time. Long-term effects are not fully established, as follow-up durations were limited in many initial trials. There is limited information for long-term outcomes, especially regarding how the body manages systemic or functional imbalance years after treatment.

Evidence highlights what is known and what is still uncertain about how elimination of H. pylori was associated with patterns related to preventing ulcer recurrence over many years.


Evidence in Special Populations

This section will outline what research has been conducted on Ulcepac's effects in specific patient groups, such as older adults, people with other existing health conditions (comorbidities), or groups where evidence is typically limited or complex.

Studies explored its effects on outcomes related to physical discomfort in special populations. This includes studies where the medicine was observed in older adults and other populations who may have comorbid conditions marked by functional limitations.

Data for certain groups remain insufficient. For instance, evidence is limited regarding patients with severe pre-existing kidney or liver conditions, and certainty remains low for these subgroups. The sample sizes were modest for many studies exploring these populations, meaning that the findings describe group patterns but do not provide context for individual predictions.

For children, pregnant patients, or nursing mothers, the research is also ongoing, and evidence quality varies across studies. Therefore, specific information and results apply only to the limited populations studied.


What is Still Uncertain About Ulcepac

This section will clearly synthesize the main gaps in the current research evidence, including any inconsistent findings across studies, areas where more investigation is needed, and questions that remain unanswered about the product's use.

While research describes patterns related to observed changes and elimination, several areas remain subjects of ongoing research. Comparative evidence is lacking against all alternative treatment strategies, and the findings were mixed in some research exploring how symptoms change over time.

Data are still emerging about research related to Ulcepac in people with conditions presenting with cycles of stability and flare-ups, and how these findings relate to other studied treatments. Subgroup findings are uncertain for many patients with significant health issues.

The evidence contributes to the broader evidence landscape but has limitations. Future research is needed to provide more clarity on long-term effects, refine subgroup data, and better understand patient-reported outcomes describing perceived discomfort in real-world settings.

Frequently Asked Questions (FAQ)

Common questions about Ulcepac (FAQ)

Q: What is Ulcepac used for?

Ulcepac is used to treat peptic ulcers (stomach or duodenal ulcers) that are caused by the Helicobacter pylori (H. pylori) bacterium. It is a combination therapy designed to eliminate the bacteria and allow the ulcer to heal.


Q: How does Ulcepac work?

Ulcepac is a combination medication containing two antibiotics (to kill the H. pylori bacteria) and one proton pump inhibitor (PPI) (to reduce the amount of acid produced in the stomach). Reducing stomach acid helps the antibiotics work more effectively and allows the ulcers to heal.


Q: What are the common side effects of Ulcepac?

Common side effects of Ulcepac often include:

  • Diarrhea
  • Nausea or vomiting
  • Taste disturbance (a metallic or bitter taste)
  • Abdominal pain
  • Headache

These side effects are usually temporary and resolve after treatment is finished. Inform your healthcare provider if any side effect is severe or persistent.


Q: Can Ulcepac be taken with food?

Yes, Ulcepac should be taken with food or immediately after a meal. Taking it with food can help reduce stomach upset, such as nausea and stomach pain, which are common side effects of the medication.


Q: What should I do if I miss a dose of Ulcepac?

If you miss a dose of Ulcepac, take it as soon as you remember. However, if it is almost time for your next scheduled dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you miss multiple doses, contact your healthcare provider for guidance.


Q: How long is the typical treatment course with Ulcepac?

The typical treatment course for Ulcepac is usually 10 to 14 days. It is crucial to complete the full course of therapy as prescribed by your healthcare provider, even if you feel better. Stopping early may not fully eradicate the H. pylori bacteria, leading to a recurrence of the infection and antibiotic resistance.


Q: Can I drink alcohol while taking Ulcepac?

Do not drink alcohol while taking Ulcepac and for at least three days after stopping the medication. One of the antibiotics in Ulcepac can interact severely with alcohol, causing an unpleasant reaction that may include flushing, rapid heartbeat, nausea, and vomiting. This interaction is known as a disulfiram-like reaction.

How should Ulcepac be stored and disposed of?

How to Store and Dispose of Ulcepac (Ranitidine)

Official instructions for Ranitidine-containing products, such as Ulcepac, are governed by a mandatory market withdrawal request from regulatory bodies due to product instability.

Storage Requirements

Official testing showed that the impurity N-Nitrosodimethylamine (NDMA) increases over time, even under normal conditions, with levels increasing significantly at higher-than-room temperatures. Therefore, the primary requirement is immediate disposal rather than long-term storage.

Disposal Instructions

Regulatory authorities require that consumers stop taking and dispose of any remaining product immediately. The medication should not be returned to a drug take-back program. The disposal procedure involves mixing the tablets (which must not be crushed) with an unappealing substance, placing the mixture in a sealed bag, and discarding it in the household trash. As with all medicines, the product must be kept out of sight and reach of children.

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

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