Aso

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Aso

Property Description
Active Ingredient Sucralfate
Form Tablet, Oral Suspension
Pharmacological Class Cytoprotective Agent, Gastrointestinal Agent
General Purpose Protection of the gastrointestinal lining (e.g., in ulcer management)
Origin Synthetic Chemical Complex

Aso: Definition and Pharmacological Classification

Aso is a prescription-only pharmaceutical product containing the active substance Sucralfate. It is formally classified as a Cytoprotective Agent and a Gastrointestinal Agent. The medication is a single-ingredient, synthetic chemical complex, derived from sulfated sucrose and aluminum hydroxide.

This pharmacological class is distinct because it operates primarily through a unique, local action within the digestive tract, resulting in minimal systemic absorption. Sucralfate focuses its therapeutic benefit directly on the injured lining, which is clinically recognized for its role in maintaining mucosal integrity when the lining is compromised.


Composition, Form, and Unique Benefit

The active ingredient, Sucralfate, is highly specialized, as the aluminum component is integral to forming the viscous material required for its functionality. Aso is prescribed for oral administration and is typically supplied as both a tablet and an oral suspension. The availability of the oral suspension offers a practical advantage, especially for patients with esophagitis, as it facilitates the thorough coating of the injured esophageal mucosa.

The general purpose of Aso is to serve as a powerful mucosal protectant for upper gastrointestinal lesions. Its benefit is derived from the creation of a physical protective barrier over the ulcer base. This physical layer effectively insulates the damaged area from corrosive digestive fluids, including stomach acid, pepsin, and bile salts, supporting the natural repair process of the injured lining.

Regulatory References

  1. Sucralfate: MedlinePlus Drug Information

What side effects are possible with Aso?

Possible Side Effects and Safety Information

The safety profile of Aso (Antisense Oligonucleotide) is based on data documented in official governmental regulatory sources, classifying potential adverse reactions by frequency and affected body system. This information is strictly descriptive and non-advisory.

Adverse Reaction Scope

Classification Examples of Documented Reactions
Very Common / Common Injection site reactions (e.g., pain, redness), headache, fever, nausea, vomiting, flu-like symptoms.
Uncommon / Rare Severe Hepatotoxicity (liver damage), Thrombocytopenia (low platelet count), Nephrotoxicity (kidney damage), Glomerulonephritis, Severe hypersensitivity reactions.

System-Organ-Classes Involved

Adverse reactions are formally grouped by the body system affected, including Hepatobiliary disorders (liver), Renal and urinary disorders (kidney), Blood and lymphatic system disorders, Immune system disorders, and General disorders and administration site conditions.

Safety Restrictions and Monitoring

Official labels document the risk of Serious Adverse Reactions (SARs), including severe liver injury and hematologic complications. Consequently, regulatory documents mandate specific Safety-Related Restrictions and Monitoring requirements. This includes the required baseline and periodic laboratory monitoring of liver function tests (ALT/AST) and kidney function throughout the treatment duration. Certain severe pre-existing conditions (e.g., severe hepatic or renal impairment) may be listed as contraindications or require extreme caution.

Population-Specific Safety

Safety statements are explicitly documented for specific groups, often requiring caution or adjustment for patients with renal or hepatic impairment.

Overdose and Emergency Response

Overdose and When to Seek Help

This section outlines the official regulatory information for an ASO drug regarding over-exposure, strictly based on government-authorized prescribing documents such as the European Summary of Product Characteristics (SmPC).


Official Regulatory Overdose Profile

The official overdose profile for this Antisense Oligonucleotide (ASO) is defined by the data collected during regulatory-approved clinical trials. According to these documents, no cases of overdose associated with the drug were reported in clinical studies. Consequently, the overdose classification is based on general principles of drug management rather than documented clinical manifestations from over-exposure events.


Required Emergency Response

In the event that an over-exposure is suspected, regulatory labeling mandates specific immediate actions to ensure patient safety and monitoring. The required official procedures are:

  • Supportive medical care should be provided to manage any clinical symptoms that may arise.
  • Consulting with a healthcare professional is required to assess the situation.
  • Close observation of the clinical status of the patient is necessary to monitor for any delayed or unexpected effects of the drug.

These instructions define the threshold for seeking urgent medical assistance: contact a healthcare professional or emergency services immediately if the prescribed dose or administration schedule is exceeded. Management focuses solely on professional observation and providing supportive care.

Therapeutic Uses of Aso

Quick Facts

  • Condition Supported: Chronic Hepatitis C virus (HCV) infection.
  • Patient Population: Adult patients with specific HCV genotypes.
  • Therapy Goal: To help support viral eradication and manage the condition.

Aso is an approved medication used as part of a combination regimen for the management of chronic Hepatitis C virus (HCV) infection in adult patients. The goal of this therapy is to help support viral eradication.

This treatment option is primarily indicated for individuals with certain HCV genotypes, such as genotype 1b, and is often studied in patients who are either treatment-naive or who have received prior treatments. Aso is used in association with other antiviral agents, such as daclatasvir, to address the viral infection.

The therapeutic approach aims to reduce the presence of the virus in the body, which may help support the overall management of the condition and is associated with a sustained virologic response in a significant percentage of patients.

Patients considering this treatment should review all approved uses and combination therapies with their healthcare provider to ensure it aligns with their specific medical profile and HCV genotype.

Eligibility and Restrictions for Use

Who Can and Cannot Use Aso? - Official Regulatory Information

This section outlines the eligibility and non-eligibility for Aso (Sucralfate) based strictly on official regulatory prescribing information.


Eligibility Constraints

Eligibility Status Population/Condition Regulatory Constraint
Absolute Contraindication Patients with known hypersensitivity to Sucralfate or any excipient. Use is strictly prohibited.
Use Not Established Pediatric patients (under 18 years of age). Safety and effectiveness have not been established.
Conditional Use (Caution) Patients with chronic renal failure or on dialysis. Use with caution due to the risk of aluminum accumulation.
Conditional Use (Caution) Older adult patients (Geriatric). Use with caution due to the greater likelihood of decreased renal function.
Conditional Use (If Clearly Needed) Pregnant women. Use is permitted only if clearly needed, due to insufficient human study data.
Conditional Use (Caution) Patients with conditions predisposing to bezoar formation or Diabetes. Use with caution is advised based on label warnings.

Eligible Population

Aso is officially indicated for use in the adult population (aged 18 and older) under standard labeled conditions. The overall eligibility profile is structured by prohibiting use in patients with hypersensitivity and establishing restrictions for populations with impaired organ function, such as those with renal issues, and for age groups where safety data is insufficient.

What should I know about interactions with other medicines?

Aso’s interaction profile is defined by its unique action as a local cytoprotective agent. Unlike many medications, Aso’s primary interaction mechanism is non-systemic physical binding within the gastrointestinal tract, which can reduce the therapeutic effect of other orally administered medicines. There are no documented metabolic (CYP-mediated) or transporter-based interactions stated in regulatory labeling. The documents establish mandatory timing separation rules to prevent reduced absorption (bioavailability) of co-administered drugs.

Interaction Category Interacting Substances and Rule (Regulatory Basis)
Reduced Bioavailability Cimetidine, Digoxin, Fluoroquinolone antibiotics, L-thyroxine, Phenytoin, Quinidine, Ranitidine, Theophylline, and others. These must be administered 2 hours prior to Aso.
Additive Aluminum Load Aluminum-containing products (e.g., antacids). These should not be taken within 30 minutes of Aso.

This additive aluminum exposure risk is clinically significant for specific patient populations. Patients with Chronic Renal Failure or those receiving Dialysis are noted in official labeling to be at heightened risk of systemic aluminum accumulation and toxicity due to impaired excretion. Aso is not listed as having any formal, absolute drug-drug contraindications based on the binding mechanism; restrictions are managed by mandated timing separation.

Mechanism of Action

How Aso Works: The Mechanism of Action

The mechanism of action for Sucralfate (Aso) is strictly localized to the gastrointestinal lumen and relies on a physical, pH-dependent activation. Upon exposure to an acidic environment ( pH < 4), Sucralfate undergoes polymerization and cross-linking, transforming into a highly viscous, poly-anionic gel. This polymer exhibits a strong electrostatic affinity for the positively charged proteins (e.g., fibrinogen) exposed at the affected tissue surface, forming a dense, durable physical coating.

This adhesive barrier prevents direct contact between the underlying tissue and aggressive intraluminal contents. It performs a critical function by adsorbing and sequestering the proteolytic enzyme Pepsin A and corrosive Bile Salts, thereby blocking continuous chemical disruption. The mechanism also involves trophic activity, indirectly promoting local synthesis of Prostaglandin E2 and shielding endogenous growth factors (EGF, FGF2) from degradation. This combination of physical protection and trophic support promotes epithelial cell restitution and supports the return toward mucosal integrity.

Dosage and Administration Information

How to Use Aso

Aso, which contains the active substance Sucralfate, is approved solely for oral administration and is supplied as both a tablet and an oral suspension. The required dosing frequency is dictated by the treatment phase. For the short-term treatment of active duodenal ulcers, the established schedule is a 1 gram dose taken four times daily (q.i.d.). When used for longer-term prophylactic maintenance after ulcer healing, the standard regimen is a 1 gram dose administered twice daily (b.i.d.).

A critical requirement for administration is that Aso must be taken on an empty stomach to ensure proper function. This typically involves scheduling doses approximately one hour before meals and a final dose at bedtime during the active treatment phase. The official instructions mandate separation from other substances: antacids must not be taken within 30 minutes of Aso, and other oral medications must be separated by at least two hours. If the oral suspension form is used, it is a procedural requirement that the liquid is thoroughly shaken before each use.

The duration of active therapy is defined as four to eight weeks, or until healing is confirmed. Maintenance therapy, if prescribed, may continue for up to 12 months. For specific patient populations, caution is required: safe and effective use in pediatric patients is not established, and dosing for older adults or those with impaired kidney function must begin at the lower range. Intravenous administration is prohibited under all circumstances.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Osteoarthritis Pain Management

Studies have evaluated whether the drug is associated with changes in pain reduction and overall joint function in osteoarthritis patients. Research involved randomized controlled trials (RCTs) and long-term observational studies.

  • Meta-Analysis Findings: Specifically, a meta-analysis reported observed differences in the Western Ontario and McMaster Universities Arthritis Index (WOMAC) score compared to placebo during the study period.
  • Dose Response: Studies have examined whether patients who did not meet primary endpoints were studied with varied dosages.
  • Combination Therapy: Research has explored whether the combination of the drug with standard Nonsteroidal Anti-inflammatory Drugs (NSAIDs) was associated with a change in the total daily NSAID dose needed. This combination has been studied for its use in long-term treatment protocols.

Rheumatoid Arthritis and Inflammatory Modulation

Research has also focused on the drug's role in the management of rheumatoid arthritis (RA).

  • Mechanism of Action: In patients with rheumatoid arthritis, research has explored the drug's effect on inflammatory markers, and studies have assessed whether this is associated with changes in Disease Activity Score 28 (DAS28) results.
  • Flare Management: The anti-inflammatory properties of the drug have been examined to determine if they are associated with differences in flare severity.
  • Safety Profile: Clinical trials tracked the incidence of adverse events, including gastrointestinal and cardiovascular events, to characterize the long-term observation of patient experiences.

Frequently Asked Questions (FAQ)

Common questions about Aso (FAQ)


Q: Is Aso the same as other medications used for the same condition?

A: Aso (Sucralfate) is officially classified as a cytoprotective agent. Its function involves creating a physical coating, like a barrier, over the ulcer to offer protection from harsh digestive fluids. This mechanism is distinct from other common ulcer medications that work primarily by chemically reducing the amount of acid the stomach produces.


Q: Does Aso interact with common vitamins or herbal supplements?

A: Official product information advises that healthcare providers should be made aware of all medicines, including vitamins and herbal products, being taken. Because Aso works by physically binding to things in the stomach, there is a possibility that it could reduce the absorption of other orally administered substances. Consultation with a healthcare provider is generally recommended to determine the appropriate time separation for these products.


Q: Is it common to have headaches when starting Aso?

A: Regulatory information indicates that a headache is a reported adverse effect of Aso.


Q: Can Aso be prescribed for more than one condition?

A: The regulatory approval for Aso (Sucralfate) is specifically for the short-term treatment and longer-term maintenance of duodenal ulcers.


Q: How does Aso compare to similar over-the-counter options?

A: Aso is a prescription-only medication. Its method of action is to form a physical protective barrier over the damaged lining, distinguishing it from over-the-counter antacids, which work chemically to neutralize stomach acid. This physical action is distinctive to its pharmacological class as a cytoprotective agent.


Q: Are there any documented long-term safety concerns with Aso?

A: A documented safety concern for long-term use exists for patients with chronic renal failure (severe kidney problems) or those on dialysis. Due to impaired kidney function, there is a risk of aluminum accumulation and toxicity over time. Regulatory documents state that patients with chronic renal failure or those on dialysis require specific monitoring for this risk.


Q: Does taking Aso impact the ability to get pregnant or affect fertility?

A: Studies in animals have shown no evidence that Aso impairs fertility. However, there is insufficient data available from human studies to draw a conclusion on the drug's effect on fertility in humans.


Q: Is Aso a steroid or a non-steroid drug?

A: Aso is classified as a Cytoprotective Agent and a Gastrointestinal Agent. It is a synthetic chemical compound and is not classified as a steroid.


Q: How quickly does Aso usually start to work?

A: Aso begins its action by forming a protective barrier over the injured area, with this protective effect starting in approximately 1 to 2 hours after administration. This local protective effect lasts for about six to eight hours per dose.


Q: What are the most common side effects people report when taking Aso?

A: According to regulatory documents, the most commonly reported adverse effect in clinical studies is constipation, which occurs in an estimated 1% to 10% of patients.


Q: Will Aso make me feel sleepy or tired during the day?

A: Sleepiness (drowsiness) is listed in regulatory documents as a reported adverse effect of Aso.


Q: Can I take Aso with Tylenol (acetaminophen) or ibuprofen?

A: Aso is generally required to be administered separately from other oral medications due to the risk of reduced absorption. The established regulatory guidance for Aso requires separating administration from other oral medications by a specific time period to help ensure they work correctly. Information regarding time separation for non-prescription medicines is available from a healthcare professional.


Q: Does Aso have a generic version available, and is it identical?

A: The generic version of Aso is sucralfate, and it is available in both tablet and oral suspension forms. Generic products must meet the same strict quality, strength, and effectiveness standards as the brand-name product.


Q: Why do some people say Aso stopped working for them after a while?

A: Official labeling notes that the underlying duodenal ulcer condition is naturally chronic and recurrent. While Aso is effective for short-term healing, successfully completing a course of treatment does not prevent the possibility of future ulcer recurrence.


Q: Does Aso affect appetite or cause weight changes?

A: Loss of appetite is listed in regulatory documents as a reported adverse reaction of incidence not known.


Q: Is it true that Aso should not be taken with alcohol?

A: Regulatory documents note that the use of the medication alongside alcohol or tobacco should be a topic of discussion with a healthcare professional, as potential lifestyle interactions may be relevant.


Q: Does Aso have any warnings related to driving or operating machinery?

A: The official adverse reactions list includes effects such as dizziness and sleepiness. Individuals should be mindful of these potential effects before performing activities that require concentration, like operating machinery or driving.


Q: How long does Aso stay in your system after stopping treatment?

A: Aso is minimally absorbed into the bloodstream (less than 5%) due to its local action in the gut. The small amount that is absorbed is rapidly excreted, with an estimated half-life of 6 to 8 hours.


Q: Is Aso considered a controlled substance?

A: Aso (Sucralfate) is not classified as a federally controlled substance.


Q: What happens if I accidentally take too much Aso?

A: Symptoms reported in regulatory documents in the event of an overdose may include indigestion, nausea, vomiting, and abdominal pain. Information for managing a suspected overdose is available from a healthcare professional.


Q: Is Aso safe for people with pre-existing heart conditions?

A: Official guidance advises caution in dose selection for older adults due to the greater likelihood of decreased hepatic, renal, or cardiac function in that population. The need for caution in patients with pre-existing conditions, including decreased cardiac function, is noted in regulatory information, especially for older adults.


Q: Is it normal to feel a bit dizzy when first starting Aso?

A: Dizziness is listed in regulatory documents as a reported adverse effect of Aso, indicating that it is an effect experienced by some patients.


Q: Does Aso carry a Boxed Warning (Black Box Warning) in official documents?

A: A serious safety warning exists in official documents against inappropriate intravenous administration. The warning clarifies that Aso should only be administered via the oral route, as use in the blood vessels is associated with a risk of fatal complications.


Q: Is Aso habit-forming or addictive?

A: Aso is not listed as a federally controlled substance. This classification indicates that Aso has not been determined to have a high potential for abuse or dependence.


Q: What does the FDA (or other agency) say about Aso's approval?

A: Aso is approved by the FDA for the short-term treatment and maintenance of duodenal ulcers.

How should Aso be stored and disposed of?

How to Store and Dispose of Aso (Sucralfate)

Official regulatory documents define strict conditions for storing and discarding this medication to ensure its stability and public safety.

Storage Requirements

The product must be stored at controlled room temperature, generally between 20 C and 25 C (68 F and 77 F). The container must be kept tightly closed and stored in a dry place, protected from excessive moisture and heat. It is a mandatory requirement to protect the oral suspension from freezing. The medication must always be stored out of the sight and reach of children.

Disposal Instructions

Unused or expired Aso must be disposed of according to local regulatory protocols. The product must not be flushed down a toilet, poured down a sink, or thrown into household trash. Instead, patients should use a government-approved medicine take-back program or a designated disposal site.

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

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