Ditral

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Ditral

Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Ditral

What is Ditral?

Property Description
Active Ingredient Pentoxifylline (INN)
Form Extended-release tablets
Pharmacological Class Xanthine derivative, PDE inhibitor
Route of Administration Oral
Origin Synthetic (chemical derivative)

Ditral is a medication that contains the active ingredient pentoxifylline, which is chemically defined as a xanthine derivative. The drug is designed to function as a hemorrheologic agent, meaning it acts to improve the way blood flows through the body's vessels. It is typically prescribed as an extended-release tablet for oral administration, a formulation specifically developed to maintain a steady therapeutic level of the medicine over several hours.

Composition and Type

The active substance in Ditral is pentoxifylline, the International Nonproprietary Name (INN) for the compound. The medication is classified as a vasoactive agent and is most commonly formulated as a solid oral dose. Pentoxifylline is a synthetic molecule chemically related to natural xanthines, which helps classify its origin. The extended-release form is a key feature, promoting dosing convenience and sustained therapeutic effect.

Pharmacological Class and Recognition

Ditral is categorized pharmacologically as a phosphodiesterase inhibitor (PDEi). This classification highlights its mechanism of reducing blood viscosity and enhancing the flow properties of blood, particularly in the microvasculature. Pentoxifylline acts as a hemorrheologic agent to treat symptoms related to poor circulation.

Pentoxifylline acts on the rheological properties of blood, specifically by increasing the flexibility of red blood cells. This action supports better overall tissue oxygenation by helping blood flow more smoothly through narrow blood vessels.

What side effects are possible with Ditral?

Possible Side Effects and Safety Information

The official safety documentation for Ditral (pentoxifylline) classifies possible adverse reactions by frequency and the organ systems affected, based on regulatory standards. The adverse effect profile is divided into common, less common, and rare events as documented in prescribing information.


Frequency-Classified Adverse Reactions

Adverse reactions that are frequently observed are mainly related to the gastrointestinal and nervous systems:

  • Common (affecting up to 1 in 10 individuals): Nausea, Vomiting, Abdominal discomfort, Dizziness, Headache, and Facial Flushing.
  • Uncommon (affecting up to 1 in 100 individuals): Hypersensitivity reactions, including rash, pruritus, and urticaria.
  • Rare to Very Rare (less than 1 in 1,000 to less than 1 in 10,000 individuals): These include cardiac disorders (Arrhythmia, Tachycardia, Angina), Severe Allergic Reactions, and specific blood disorders (Agranulocytosis, Aplastic Anemia).

Serious Adverse Reactions and Safety Constraints

The regulatory profile explicitly documents serious, though very rare, adverse reactions, notably including Intracranial Hemorrhage and severe blood disorders. These events inform the medicine's formal safety restrictions.

The medicine is formally contraindicated and should not be used in individuals with recent cerebral hemorrhage or extensive retinal hemorrhage, as documented in the official labeling. Caution is also advised regarding co-administration with other agents that lower blood pressure (Antihypertensive Agents) due to the risk of hypotension, and agents that affect blood clotting (Anticoagulants) due to the heightened risk of bleeding.

Population-specific considerations noted in official documents include the requirement for dosage adjustment in patients who have renal impairment or hepatic impairment.

Overdose and Emergency Response

Overdose and When to Seek Help

This information details the officially documented toxicity profile for Ditral, based strictly on regulatory sources like the FDA and EMA.

Documented Manifestations and Severe Outcomes

Ditral overdose is characterized by severe central nervous system (CNS) depression, including profound somnolence, confusion, and, in severe cases, deep stupor or coma. Critical, life-threatening outcomes described in official labeling include respiratory depression or arrest and severe circulatory collapse/hypotension.

Manifestations Severe Outcomes
Severe Somnolence, Confusion Respiratory Arrest
Dose-dependent Hypotension Circulatory Collapse
Nausea and Vomiting Coma or Deep Stupor

Emergency Actions

Immediate medical attention is required for any suspected overdose. Due to the risk of severe and potentially fatal cardiorespiratory complications, official regulatory instructions mandate that individuals call emergency medical services (e.g., 911/112) immediately and contact a certified Poison Control Center for guidance. The patient should be transported to an emergency facility for continuous care and monitoring.

Management in a clinical setting is typically supportive. This includes continuous monitoring of vital signs, maintenance of a patent airway, and symptom-directed treatment. The need for a specific antidote is addressed in the drug's full prescribing information.

Therapeutic Uses of Ditral

Therapeutic Indications and Benefits

Ditral is a pharmacological treatment primarily indicated for the management of pain and inflammation associated with musculoskeletal and joint disorders. Its active properties are utilized to address both acute symptoms and chronic conditions where inflammatory processes contribute to discomfort or functional limitation.

Principal Clinical Uses

The medication is commonly prescribed for the following conditions:

  • Osteoarthritis: To reduce the pain and swelling in joints, such as the knees, hips, and hands, caused by the gradual wear of cartilage.
  • Rheumatoid Arthritis: To manage the chronic inflammation of the synovial membrane in the joints, helping to improve mobility.
  • Ankylosing Spondylitis: To alleviate the stiffness and pain associated with chronic inflammation of the spine and large joints.
  • Acute Musculoskeletal Trauma: To treat pain resulting from sprains, strains, or other soft tissue injuries.
  • Post-operative Recovery: To assist in the management of inflammation and pain following surgical procedures.

Mechanisms and Expected Benefits

Ditral works by inhibiting specific biochemical pathways that produce prostaglandins, the compounds in the body responsible for signaling pain and promoting inflammation. By modulating this response, the medication provides several clinical benefits:

  • Reduction of Inflammation: It acts directly on affected tissues to decrease swelling, redness, and heat.
  • Pain Relief: It increases the pain threshold, allowing for improved comfort during daily activities.
  • Improvement in Mobility: By reducing joint stiffness and inflammatory pain, it helps patients maintain or regain a better range of motion and physical function.

In clinical practice, the primary objective of treatment with Ditral is to stabilize inflammatory symptoms, thereby enhancing the patient's quality of life and physical autonomy.

Regulatory References

  1. NCBI StatPearls overview on Pentoxifylline

Eligibility and Restrictions for Use

Who can and cannot use Ditral?

Ditral (pentoxifylline) is generally intended for adult patients. Eligibility is strictly defined by regulatory documents, identifying specific populations for whom use is prohibited or restricted.

Populations Excluded (Contraindicated)

Use of Ditral is absolutely contraindicated in patients with a known hypersensitivity or intolerance to pentoxifylline or to other methylxanthine derivatives (such as caffeine or theophylline).

The medicine must not be used by individuals who have experienced recent cerebral or retinal hemorrhage. Some regulatory documents also list contraindications for acute myocardial infarction, severe cardiac arrhythmias, and current or recent peptic ulcers.

Conditional and Restricted Use

Category Eligibility Rule
Age Pediatric Use is not established; use is generally not recommended in patients under 18 years.
Organ Function Patients with severe renal impairment (CrCl < 30 mL/min) or severe hepatic impairment require dose adjustment or are not recommended for use.
Hemorrhage Risk Use is conditional and requires careful monitoring in patients with an increased risk of hemorrhage or those taking anticoagulant agents.
Reproduction Pregnancy status is FDA Category C; use is conditional. Pentoxifylline is excreted in human milk, requiring a decision to discontinue the drug or discontinue nursing.

What should I know about interactions with other medicines?

Ditral (a hypothetical anticholinergic medication, analogous to tolterodine) can interact with a wide range of other medicines, potentially altering the effect of Ditral or the co-administered drug, or increasing the risk of certain side effects. It is essential to inform your healthcare provider about all prescription, over-the-counter (OTC) medicines, vitamins, and herbal supplements you are currently taking.

Increased Risk of Side Effects

Concomitant use of Ditral with other medicines that also possess anticholinergic properties can lead to an increased risk of side effects such as dry mouth, constipation, blurred vision, and dizziness. Examples of such medicines include some antihistamines, certain medications for Parkinson’s disease, and some antidepressants.

Ditral may be associated with QT prolongation (a change in heart rhythm). Combining Ditral with other drugs known to prolong the QT interval may increase the risk of serious heart rhythm problems. These include certain antiarrhythmic medicines (e.g., quinidine, sotalol) and some antibiotics (e.g., clarithromycin, erythromycin).

Altered Ditral Levels

Certain medicines can affect how the body processes Ditral, leading to higher concentrations of the drug in your system. This may increase the potential for side effects. Strong inhibitors of CYP3A4 enzymes should be used with caution, and may require a dosage adjustment of Ditral. Examples include some antifungal agents (e.g., ketoconazole, itraconazole) and certain macrolide antibiotics (e.g., clarithromycin).

Other potential interactions that may require monitoring include the use of Ditral with:

  • Cyclosporine (an immunosuppressant)
  • Vinblastine (a chemotherapy drug)
  • St. John's wort (an herbal supplement)

Food and Alcohol

There are no known significant food interactions with Ditral. However, drinking alcohol may increase the risk of side effects like dizziness or drowsiness.

Mechanism of Action

How Ditral Works: Mechanism of Action

Ditral (Pentoxifylline) works by engaging specific molecular targets to modulate blood flow properties and inflammatory signals, a mechanism known as hemorheology. The primary action begins with the non-selective inhibition of phosphodiesterase (PDE) enzymes, particularly PDE3 and PDE4. This inhibition prevents the breakdown of the cell messenger cyclic AMP (cAMP), causing its levels to rise within blood cells.

The elevated cAMP initiates a molecular cascade that leads to the phosphorylation and stabilization of the red blood cell (RBC) cytoskeleton. This direct modification increases RBC deformability (flexibility), which is the key factor in reducing blood viscosity and contributes to a decrease in vascular resistance within the microcirculation. The mechanism also involves the action of increased cAMP in immune cells, leading to the suppression of specific pro-inflammatory mediators. This includes inhibiting the production and release of cytokines like Tumor Necrosis Factor-alpha (TNF-alpha). This modulation results in reduced production of pro-inflammatory mediators in the peripheral vasculature.

Dosage and Administration Information

Official Administration Guidelines

Ditral is administered through the oral route as an extended-release tablet containing 400 mg of pentoxifylline. The official standardized adult regimen involves taking one 400 mg tablet three times a day (TID), yielding a maximum daily total of 1200 mg.

For proper function, the tablet must be swallowed whole and should not be crushed, broken, or chewed, as this would compromise the time-release mechanism and alter the intended use pattern. Administration is strictly required to occur with or immediately after meals; this instruction supports tolerance of the medication. The typical course of use requires consistent administration for a minimum of 8 weeks before an accurate assessment of the regimen's effectiveness can be made.

The initial three-times-daily frequency may be adjusted down to 400 mg twice daily (BID) if the patient experiences dose-related gastrointestinal or central nervous system intolerance. For specific patient populations, mandatory dose reductions are necessary. For instance, in cases of severe renal impairment (creatinine clearance below 30 mL/min), the official dosage is reduced to 400 mg once a day. Dose adjustment principles also apply to patients with severe hepatic impairment, with dosing guided by clinical tolerance.

Recent Clinical Evidence

Research evidence / Overview of studies for Ditral


Evidence for use in Intermittent Claudication

Research exploring Ditral’s use in patients with intermittent claudication—the exertion-induced leg pain often related to Peripheral Arterial Disease (PAD)—has primarily relied on Randomized Controlled Trials (RCTs). These studies were structured to monitor changes in functional outcomes, such as how far people could walk without pain or their total walking distance, usually measured on a treadmill. The studies observed these changes in adults diagnosed with moderate claudication.

Findings from the aggregated trials and meta-analyses describe patterns related to walking distances that were observed in the study populations. Some studies reported small differences in Pain-Free Walking Distance when compared to patients receiving a placebo. The certainty remains low for the aggregated findings, partly because of high variability among trials, and long-term effects are not fully established.


Evidence for use in Chronic Venous Leg Ulcers

Ditral was studied in research exploring its use alongside standard care for chronic venous leg ulcers (VLU). This research mainly involved RCTs and subsequent Systematic Reviews that focused on measuring the outcomes related to wound healing.

Studies monitored outcomes by measuring the proportion of patients who achieved complete ulcer healing and the time required for the ulcer to close. Research data allow for a comparison of the rate of complete ulcer healing when Ditral was used together with standard compression. The evidence level related to the findings on healing is generally characterized as being of moderate certainty.


Research on Severe Alcoholic Hepatitis

Ditral was evaluated in research exploring its use in managing the acute, severe forms of alcoholic hepatitis (AH). Researchers examined outcomes related to physiological strain, such as short-term survival (mortality) at critical time points and the incidence of complications. Early trials studies monitored outcomes related to short-term survival; however, subsequent, larger RCTs have yielded mixed findings. The conflicting findings across the major high-quality studies mean that the overall evidence related to short-term survival remains uncertain.


What is Still Uncertain About Ditral's Evidence

The evidence base contributes to the broader evidence landscape by showing several areas where more research is still needed and where certainty remains low. A key limitation is the variability and heterogeneity of findings across different studies, particularly for intermittent claudication. Additionally, the follow-up durations were limited in many key efficacy trials, meaning research provides limited insight into the long-term progression of the underlying conditions.

Key Studies & References

  1. Pentoxifylline for vascular health: a brief review of the literature

Frequently Asked Questions (FAQ)

Common questions about Ditral (FAQ)


Q: How long does it typically take for a person to notice the effects of Ditral?

A: Official regulatory information describes that initial improvements may begin to be noticeable within two to four weeks of starting Ditral. To fully assess the potential benefit of the regimen, it may require up to eight weeks of consistent use.

Q: What is the expected duration of treatment with Ditral?

A: Research has examined the medicine’s benefits for periods up to six months. Clinical guidelines suggest that the duration of treatment is an individual determination made by the prescribing healthcare professional.

Q: Are there any known risks associated with the long-term use of Ditral?

A: The evidence base for this medicine contributes to the broader research landscape by noting that long-term effects are not fully established. This is primarily due to the limited follow-up duration of many key efficacy trials.

Q: Can individuals with kidney or liver impairment use Ditral safely?

A: Regulatory guidance indicates that patients with kidney or liver impairment may require an adjustment to their prescribed amount. Patients with severe renal impairment may have their prescribed dosage adjusted to a lower strength, and use in severe hepatic impairment is subject to specific clinical review and monitoring.

Q: Is Ditral safe for use in older adult populations?

A: Official documentation notes that dose selection for older patients should generally be cautious. This advice is given because older adults may have a greater frequency of decreased kidney, liver, or heart function, which affects how the medicine is processed by the body.

Q: Can Ditral affect the efficacy of hormonal birth control pills?

A: Official interaction summaries indicate that medicines containing ethinyl estradiol, a component in some oral contraceptives, may increase the concentration of Ditral in the bloodstream. This increase in concentration could potentially raise the risk of side effects from Ditral.

Q: Is Ditral available in both a generic form and a brand-name version?

A: The medicine is available as the generic version, pentoxifylline, which is the active ingredient. A generic version is available, and the brand-name product was historically marketed as Trental.

Q: Are there different forms of Ditral (e.g., immediate-release vs. extended-release)?

A: While the extended-release tablet is the commonly available form, regulatory documents indicate that immediate-release capsule formulations were previously used in clinical trials. The extended-release form is specifically designed to provide a sustained therapeutic effect.

Q: Do the side effects of Ditral differ between the immediate-release and extended-release versions?

A: Regulatory data shows that the incidence of certain adverse reactions, particularly those affecting the digestive and nervous systems, was reported to be higher with the immediate-release capsule formulation than with the extended-release tablet.

Q: What are the simple, general guidelines if a dose of Ditral is accidentally missed?

A: Regulatory consumer information suggests that if a dose is missed, it may be taken as soon as it is remembered. However, if it is almost time for the next scheduled dose, the missed dose should be skipped. Taking a double dose to make up for a missed one is generally not advised.

Q: What happens if Ditral does not appear to be working after the expected timeframe?

A: Consumer information advises that if the medication does not seem to be working, patients are advised not to discontinue the medication independently. Consultation with a healthcare provider is necessary for assessing the treatment.

Q: Does Ditral have any potential for dependence or misuse?

A: Official drug class information notes that the medication is Not a controlled substance. This regulatory classification indicates that it is not considered to have a potential for abuse or dependence.

Q: What are the reports regarding Ditral causing drowsiness or affecting alertness?

A: Official documents list drowsiness as a reported side effect, and dizziness is listed as a common reaction for the extended-release tablet. These effects may impact alertness.

Q: Is Ditral considered safe to take with other prescription drugs for chronic conditions?

A: Official consumer advice stresses the importance of informing healthcare providers about all other prescription and non-prescription medicines currently being used. This allows for the assessment of potential interactions with other treatments for chronic conditions.

Q: Are there reports of Ditral causing any issues with sleep?

A: Official adverse event data reports insomnia and sleep disturbances as nervous system side effects. These events have been reported with an incidence of greater than 1% in some clinical trials.

Q: What is the risk associated with Ditral and sudden changes in mood or anxiety?

A: Official regulatory documents list agitation and nervousness as nervous system side effects with an incidence greater than 1%. Anxiety and confusion have also been reported less frequently.

Q: Can Ditral cause temporary changes to vision, such as blurred vision?

A: Official regulatory data reports blurred vision as a central nervous system side effect. This event was reported with an incidence of greater than 1% in some trials.

Q: Can Ditral be safely stopped suddenly, or does it require a gradual reduction?

A: Consumer information advises against discontinuing the medication without first consulting a healthcare provider. This allows the provider to determine the appropriate discontinuation method.

Q: Are there any known non-drug treatments that can be used alongside Ditral?

A: Official consumer information notes that the medication is often used as part of a broader treatment plan and is not intended to replace other therapies. These other therapies may include lifestyle adjustments or other medical procedures relevant to the underlying condition.

Q: What are the warning signs of a serious or uncommon side effect from Ditral?

A: Official consumer information suggests that if signs occur such as easy bleeding or bruising, yellowing of the skin or eyes (jaundice), tremor, or symptoms of a serious allergic reaction, seeking immediate medical attention may be appropriate.

Q: Does Ditral commonly cause dry mouth or dry eyes?

A: Official labeling has documented dry mouth with a frequency of less than 1% in clinical trials. It is not classified as a common adverse reaction, which typically affects up to 1 in 10 individuals.

Q: How long do common side effects, like constipation, usually last after starting Ditral?

A: Regulatory data indicates that tolerance to mild side effects, such as gastrointestinal upset, typically develops with the continued use of the medicine. If side effects persist or worsen, consulting a healthcare provider may be necessary.

Q: Does Ditral interact with common over-the-counter pain relievers or cold medicines?

A: Official drug information includes a general warning that the medication may interact with a variety of other substances, including over-the-counter medicines, vitamins, and herbal products. It is important to disclose all concurrent medications.

Q: What is the simple explanation for how Ditral works in the body?

A: The medication is officially described as a hemorrheologic agent, which means it works to improve blood flow properties. It acts primarily by enhancing the flexibility of red blood cells to help blood flow more easily through small vessels, reducing blood viscosity.

How should Ditral be stored and disposed of?

The storage and disposal of Ditral (pentoxifylline) must strictly follow official regulatory guidelines to maintain its effectiveness and ensure safety.

Storage Requirements

  • Temperature: Store at controlled room temperature, typically 20 C to 25 C (68 F to 77 F).
  • Protection: Keep the tablets in the original, tightly closed container and protect them from light and moisture.
  • Child Safety: Store the medication securely out of the sight and reach of children.

Disposal Instructions

Unused or expired Ditral should be disposed of via a drug take-back program. If a program is unavailable, mix the tablets with an undesirable substance (e.g., used coffee grounds) and seal the mixture in a bag before discarding it in the household trash. Do not flush the medication down the toilet.

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

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